Page 1 of 2

[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Mike Davis
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch" <im_planecrazy@yahoo.com>
To: "Murphy Rebel Builders" <rebel-builders@dcsol.com>
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Jim Cole
Hi Keith, my Rebel came in at 821 empty weight with the 912ULS installed.
I used the Fife wing tips but do not have the cuffs. I also have the 44 gal
tanks and if I was doing it over again I wouldn't go three bays I would use
only two.

Cheers
Jim
Rebel 333

On 10/17/2007 12:58 PM, "Mike Davis" <mike.davis@dcsol.com> wrote:
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch" <im_planecrazy@yahoo.com>
To: "Murphy Rebel Builders" <rebel-builders@dcsol.com>
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Keith Leitch
Mike,
I guess the way I look at it is if I were to go with the IO-240 I may as well use the O-320. Not that much differnce in fuel usage and the weight is still fairly hight for the HP rating.
This was the reason, and of course Bob always glamorizing the Rotax, that I have been rethinking using the Rotax.
Keith

Mike Davis <mike.davis@dcsol.com> wrote:
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch"
To: "Murphy Rebel Builders"
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Keith Leitch
Jim,

Unfortunately I have already done the 3-bays fuel tank. Is it that much of a con to using the 44 gallon wings. I understand that there would be WAY more fuel than a guy needs but other than that is there much problem?
How do you like the performance with the Rotax?
If you want to mail my home email that is ok im_planecrazy at yahoo dot com.

Keith

Jim Cole <jcole@rangroup.com> wrote:
Hi Keith, my Rebel came in at 821 empty weight with the 912ULS installed.
I used the Fife wing tips but do not have the cuffs. I also have the 44 gal
tanks and if I was doing it over again I wouldn't go three bays I would use
only two.

Cheers
Jim
Rebel 333

On 10/17/2007 12:58 PM, "Mike Davis" wrote:
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch"
To: "Murphy Rebel Builders"
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by David Jackson
The only time you have too much fuel is when you are on fire. There is nothing to stop you from only carrying the fuel you require for the flight you have planned. Having the larger tanks available will give you more options if you travel somewhere solo, you can fill the tanks and have an extra degree of safety to find an alternate or use the fuel to fly longer legs on a trip.

Dave J> Date: Wed, 17 Oct 2007 11:32:11 -0700> From: im_planecrazy@yahoo.com> Subject: Re: [rebel-builders] Rebel empty weight with Rotax> To: rebel-builders@dcsol.com> > Jim,> > Unfortunately I have already done the 3-bays fuel tank. Is it that much of a con to using the 44 gallon wings. I understand that there would be WAY more fuel than a guy needs but other than that is there much problem?> How do you like the performance with the Rotax?> If you want to mail my home email that is ok im_planecrazy at yahoo dot com.> > Keith> > Jim Cole <jcole@rangroup.com> wrote:> Hi Keith, my Rebel came in at 821 empty weight with the 912ULS installed.> I used the Fife wing tips but do not have the cuffs. I also have the 44 gal> tanks and if I was doing it over again I wouldn't go three bays I would use> only two.> > Cheers> Jim > Rebel 333> > On 10/17/2007 12:58 PM, "Mike Davis" wrote:> > > Have you considered an IO-240?> > > > Mike> > > > ----- Original Message -----> > From: "Keith Leitch" > > T
o: "Murphy Rebel Builde
r
s" > > Sent: Wednesday, October 17, 2007 8:46 AM> > Subject: [rebel-builders] Rebel empty weight with Rotax> > > > > >> Well guys, I'm still about 50 years from completeing my Rebel and with> >> fuel prices going through the roof I have been relooking at installing the> >> Rotax in my Rebel "when" I get to that point. The problem I feel is a may> >> be a little on the heavy side to use this engine. I have been spraying> >> every piece, prior to assembly, with 2-part epoxy primer as I plan on> >> putting it on floats. I also built the wings with the 44 gallon tanks, and> >> have plans to install Angus's cuffed leading edge. I wasn't as worried> >> about the weight as I originally was installing an O-320. BUt now I am> >> wondering if I will end up with a very heavy Rebel to be powered by the> >> Rotax.> >> > >> What is the average completed empty weight of a Rebel with the Rotax?> >> > >> Also, I have another question for the airplane gurus on here. I have a> >> 7AC Champ with an 0-235
in it and am thinking o
f
putting an Aeromatic prop> >> on it. Has anyone used one of these props? Also, has anyone ever thought> >> about useing one on a Rebel? Just asking because I may still have to build> >> with the O 320.> >> > >> Thank you,> >> Keith R661> >> > >> > >> __________________________________________________> >> Do You Yahoo!?> >> Tired of spam? Yahoo! Mail has the best spam protection around> >> http://mail.yahoo.com> >> > >> > >> > >> -----------------------------------------------------------------> >> List archives located at: https://mail.dcsol.com/login> >> username "rebel" password "builder"> >> Unsubscribe: rebel-builders-unsubscribe@dcsol.com> >> List administrator: mike.davis@dcsol.com> >> -----------------------------------------------------------------> >> > >> > >> > > > > > > > > > > -----------------------------------------------------------------> > List archives located at: https://mail.dcsol.com/login> > username "rebel" password "builder"> > Unsubscribe: rebel-builders-unsu
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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by WALTER KLATT
If you want to keep it as light as possible (to also maximize your fuel savings), I wouldn't go with the cuffs. Keep in mind that lighter weight also lowers your stall speed, and the stock Rebel wing already has a very low stall speed. If you still want to lower it even more, you can always add VGs later, which don't add any measurable weight, and do the same thing, and maybe get some other benefits like more aileron authority at low speeds. I have them on my Rebel, and they lowered my stall speed by about 8 - 10 mph in the neutral flap position (can't even measure my stall speed with full flaps now), and no adverse effects on speed or anything else.

On the engine choice, bear in mind that it takes the same hp to pull the plane through the air at the same weight. Of course, the plane will be about 100 pounds lighter with the Rotax, but am not sure how much that translates into less hp required. However, contrary to popular opinion, the 912 Rotax uses the same fuel per hp per hour that the Lycoming does when properly leaned.

I have another plane that I fly with the 912 Rotax, and have fuel monitors in both. I then was able to determine that at 65% power, my 320 used .46 lb/hp/hr, and have found this to also be exactly the same in the 912 plane at 65% power as well. And if you check the power charts in the Lycoming and Rotax manuals, they also say the same thing.

So other than weight, your 320 Lycoming is really not that inefficient. Of course if you use all that power, you will pay, but you don't have to. In the summer, at my cabin, when I am just taking friends up for short flights around the lake, I usually cruise at around 80 mph, lean it out, and am only using 5.0 US gph. They don't know the difference (unless it is another pilot, in which case I usaully go a little faster).

I think you could get a used 320 Lyc for about the same if not less money than a new 912 ULS. And I don't think there are too many used 100 hp 912's around.

JMHO
Walter

----- Original Message -----
From: Keith Leitch <im_planecrazy@yahoo.com>
Date: Wednesday, October 17, 2007 11:32 am
Subject: Re: [rebel-builders] Rebel empty weight with Rotax
To: rebel-builders@dcsol.com
Jim,

Unfortunately I have already done the 3-bays fuel tank.
Is it that much of a con to using the 44 gallon wings. I
understand that there would be WAY more fuel than a guy needs
but other than that is there much problem?
How do you like the performance with the Rotax?
If you want to mail my home email that is ok
im_planecrazy at yahoo dot com.

Keith

Jim Cole <jcole@rangroup.com> wrote:
Hi Keith, my Rebel came in at 821 empty weight with the
912ULS installed.
I used the Fife wing tips but do not have the cuffs. I also have
the 44 gal
tanks and if I was doing it over again I wouldn't go three bays
I would use
only two.

Cheers
Jim
Rebel 333

On 10/17/2007 12:58 PM, "Mike Davis" wrote:
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch"
To: "Murphy Rebel Builders"
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel
and with
fuel prices going through the roof I have been relooking at
installing the
Rotax in my Rebel "when" I get to that point. The problem I
feel is a may
be a little on the heavy side to use this engine. I have been
spraying>> every piece, prior to assembly, with 2-part epoxy
primer as I plan on
putting it on floats. I also built the wings with the 44
gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't
as worried
about the weight as I originally was installing an O-320. BUt
now I am
wondering if I will end up with a very heavy Rebel to be
powered by the
Rotax.

What is the average completed empty weight of a Rebel with
the Rotax?
Also, I have another question for the airplane gurus on here.
I have a
7AC Champ with an 0-235 in it and am thinking of putting an
Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone
ever thought
about useing one on a Rebel? Just asking because I may still
have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Bob Patterson
Hi Dave !

Actually, there are several very good reasons why it's much better
to have only 2 bays/side on the Rebel .... especially considering
that a stock 3 bay setup is already almost 50 % more fuel than
a C-172 ! Two bays/side will still give you approx. 28 - 32 gallons -
considering the Rotax will only burn 5 gal./hr if you beat it,
that's still almost 6 hours endurance !!

If you want to fly light, with a couple of hours fuel -
say 10 gallons - imagine how deep that will be, spread out
over 6 bays total ..... not a lot of head pressure there !
Now, if you do a steep turn, with a bit of slip or skid,
you might uncover a fuel outlet ...... gee, it's quiet !! :-(

If you park it with that 10 gallons aboard, you have a
LOT of air in there, and a lot of surface - there'll be more
evaporation, and more condensation - could end up with
a lot of water in those almost-empty tanks ....
..... water doesn't burn well ! :-(

If you DO fill up those regular tanks, you will be dragging
along 300 lb..... = another passenger, and some luggage !!!
(or more than a set of floats ! )

If you ever DO have a really long trip, you can always
put one or two 5 gallon cans in the back, and, if you really
can't stop, you can hook them into the fuel system,
and the Rotax will happily suck fuel from them for a
few more hours ! We've done that on some very long trips !

Soooooo....... if you have a choice, and are going for
a Rotax 912, you are far better off to just build for 2 bays/side.
A bonus is that you will save a few pounds, and some work, in
the smaller tank skins & fewer rivets.

That said, I've been doing a lot of thinking about ways
to reduce the capacity of existing large tanks - like
inserting a rubber bladder, or ping-pong balls, to fill
space .... I'm sure we can come up with something easy !

And Keith - don't worry toooo much - she'll fly just fine,
even the way you have built her -- should weigh between
725 - 825 lb, tops. Jim & Tom both had a great Ramble
this summer, through the Rockies, with Rotax 912's,
and came home with some big smiles !!! :-) :-)
(especially when they saw the gas bills - less than HALF
the cost of running the O-320 !!)
You will still have the option of going to an O-320, or
a new diesel, if one should come along later .... that's
the beauty of the Rebel - you're not stuck with just ONE engine !

--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Wednesday 17 October 2007 19:21, David Jackson wrote:
The only time you have too much fuel is when you are on fire. There is
nothing to stop you from only carrying the fuel you require for the flight
you have planned. Having the larger tanks available will give you more
options if you travel somewhere solo, you can fill the tanks and have an
extra degree of safety to find an alternate or use the fuel to fly longer
legs on a trip.

Dave J> Date: Wed, 17 Oct 2007 11:32:11 -0700> From:
im_planecrazy@yahoo.com> Subject: Re: [rebel-builders] Rebel empty weight
with Rotax> To: rebel-builders@dcsol.com> > Jim,> > Unfortunately I have
already done the 3-bays fuel tank. Is it that much of a con to using the 44
gallon wings. I understand that there would be WAY more fuel than a guy
needs but other than that is there much problem?> How do you like the
performance with the Rotax?> If you want to mail my home email that is ok
im_planecrazy at yahoo dot com.> > Keith> > Jim Cole <jcole@rangroup.com>
wrote:> Hi Keith, my Rebel came in at 821 empty weight with the 912ULS
installed.> I used the Fife wing tips but do not have the cuffs. I also
have the 44 gal> tanks and if I was doing it over again I wouldn't go three
bays I would use> only two.> > Cheers> Jim > Rebel 333> > On 10/17/2007
12:58 PM, "Mike Davis" wrote:> > > Have you considered an IO-240?> > > >
Mike> > > > ----- Original Message -----> > From: "Keith Leit ch" > > To:
"Murphy Rebel Builde
r
s" > > Sent: Wednesday, October 17, 2007 8:46 AM> > Subject:
[rebel-builders] Rebel empty weight with Rotax> > > > > >> Well guys, I'm
still about 50 years from completeing my Rebel and with> >> fuel prices
going through the roof I have been relooking at installing the> >> Rotax in
my Rebel "when" I get to that point. The problem I feel is a may> >> be a
little on the heavy side to use this engine. I have been spraying> >> every
piece, prior to assembly, with 2-part epoxy primer as I plan on> >> putting
it on floats. I also built the wings with the 44 gallon tanks, and> >> have
plans to install Angus's cuffed leading edge. I wasn't as worried> >> about
the weight as I originally was installing an O-320. BUt now I am> >>
wondering if I will end up with a very heavy Rebel to be powered by the> >>
Rotax.> >> > >> What is the average completed empty weight of a Rebel with
the Rotax?> >> > >> Also, I have another question for the airplane gurus on
here. I have a> >> 7AC Champ with an 0-235 in it and am thinking o
f
putting an Aeromatic prop> >> on it. Has anyone used one of these props?
Also, has anyone ever thought> >> about useing one on a Rebel? Just asking
because I may still have to build> >> with the O 320.> >> > >> Thank you,>
Keith R661> >> > >> > >>



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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Keith Leitch
Walther,

What you have stated has been my way of thinking also as far as using less fuel if I want to. My problem being....I will be letting my medical expire next year for various reasons and this is the ONLY reason I want to go with the Rotax. The Champ I fly now with an O-235 is fairly good on fuel because I do the same thing....just put around slow most of the time. But when I push it, it burns nearly the same as what I normally cruise my O-300 powered 172 at.

I guess I could build it with the O-320 and not tell anyone about the medical because all my flying is from my farm anyways. What are they going to do....take my medical away! LOL

Keith

WALTER KLATT <Walter.Klatt@shaw.ca> wrote:
If you want to keep it as light as possible (to also maximize your fuel savings), I wouldn't go with the cuffs. Keep in mind that lighter weight also lowers your stall speed, and the stock Rebel wing already has a very low stall speed. If you still want to lower it even more, you can always add VGs later, which don't add any measurable weight, and do the same thing, and maybe get some other benefits like more aileron authority at low speeds. I have them on my Rebel, and they lowered my stall speed by about 8 - 10 mph in the neutral flap position (can't even measure my stall speed with full flaps now), and no adverse effects on speed or anything else.

On the engine choice, bear in mind that it takes the same hp to pull the plane through the air at the same weight. Of course, the plane will be about 100 pounds lighter with the Rotax, but am not sure how much that translates into less hp required. However, contrary to popular opinion, the 912 Rotax uses the same fuel per hp per hour that the Lycoming does when properly leaned.

I have another plane that I fly with the 912 Rotax, and have fuel monitors in both. I then was able to determine that at 65% power, my 320 used .46 lb/hp/hr, and have found this to also be exactly the same in the 912 plane at 65% power as well. And if you check the power charts in the Lycoming and Rotax manuals, they also say the same thing.

So other than weight, your 320 Lycoming is really not that inefficient. Of course if you use all that power, you will pay, but you don't have to. In the summer, at my cabin, when I am just taking friends up for short flights around the lake, I usually cruise at around 80 mph, lean it out, and am only using 5.0 US gph. They don't know the difference (unless it is another pilot, in which case I usaully go a little faster).

I think you could get a used 320 Lyc for about the same if not less money than a new 912 ULS. And I don't think there are too many used 100 hp 912's around.

JMHO
Walter

----- Original Message -----
From: Keith Leitch
Date: Wednesday, October 17, 2007 11:32 am
Subject: Re: [rebel-builders] Rebel empty weight with Rotax
To: rebel-builders@dcsol.com
Jim,

Unfortunately I have already done the 3-bays fuel tank.
Is it that much of a con to using the 44 gallon wings. I
understand that there would be WAY more fuel than a guy needs
but other than that is there much problem?
How do you like the performance with the Rotax?
If you want to mail my home email that is ok
im_planecrazy at yahoo dot com.

Keith

Jim Cole wrote:
Hi Keith, my Rebel came in at 821 empty weight with the
912ULS installed.
I used the Fife wing tips but do not have the cuffs. I also have
the 44 gal
tanks and if I was doing it over again I wouldn't go three bays
I would use
only two.

Cheers
Jim
Rebel 333

On 10/17/2007 12:58 PM, "Mike Davis" wrote:
Have you considered an IO-240?

Mike

----- Original Message -----
From: "Keith Leitch"
To: "Murphy Rebel Builders"
Sent: Wednesday, October 17, 2007 8:46 AM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel
and with
fuel prices going through the roof I have been relooking at
installing the
Rotax in my Rebel "when" I get to that point. The problem I
feel is a may
be a little on the heavy side to use this engine. I have been
spraying>> every piece, prior to assembly, with 2-part epoxy
primer as I plan on
putting it on floats. I also built the wings with the 44
gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't
as worried
about the weight as I originally was installing an O-320. BUt
now I am
wondering if I will end up with a very heavy Rebel to be
powered by the
Rotax.

What is the average completed empty weight of a Rebel with
the Rotax?
Also, I have another question for the airplane gurus on here.
I have a
7AC Champ with an 0-235 in it and am thinking of putting an
Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone
ever thought
about useing one on a Rebel? Just asking because I may still
have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Keith Leitch
Bob,

I recall you saying something similar to this awhile ago on the site, that was the reason for the question. But I am past the point of being able to only go 2-bays. But like you said....maybe I can put something in there to fill up space. I guess what I need to do is put some type of big inspection cover on the top of the tank so I can do such a thing.

The reason for my question may have been a little misleading...the fuel burn is not the main reason for going the Rotax route...I am planning on not renewing my medical next year when it becomes due and going the Sport Pilot route. I really don't want to but as everyone knows...things happen in life that we have no control over.

Also, I think I responded to Walter and he said don't use the cuffs....my reason for using them besides the performance benefit is my wife was helping me moved the leading adge and I tried telling her how to handle the sheet and of course being the wife...she thought she had a better idea and both pieses buckled in the middle leaving huge creases. I was pissed!!! Since I had planned on using the cuff anyways I figured it'll cover them up. :(

Keith

Bob Patterson <beep@sympatico.ca> wrote:

Hi Dave !

Actually, there are several very good reasons why it's much better
to have only 2 bays/side on the Rebel .... especially considering
that a stock 3 bay setup is already almost 50 % more fuel than
a C-172 ! Two bays/side will still give you approx. 28 - 32 gallons -
considering the Rotax will only burn 5 gal./hr if you beat it,
that's still almost 6 hours endurance !!

If you want to fly light, with a couple of hours fuel -
say 10 gallons - imagine how deep that will be, spread out
over 6 bays total ..... not a lot of head pressure there !
Now, if you do a steep turn, with a bit of slip or skid,
you might uncover a fuel outlet ...... gee, it's quiet !! :-(

If you park it with that 10 gallons aboard, you have a
LOT of air in there, and a lot of surface - there'll be more
evaporation, and more condensation - could end up with
a lot of water in those almost-empty tanks ....
..... water doesn't burn well ! :-(

If you DO fill up those regular tanks, you will be dragging
along 300 lb..... = another passenger, and some luggage !!!
(or more than a set of floats ! )

If you ever DO have a really long trip, you can always
put one or two 5 gallon cans in the back, and, if you really
can't stop, you can hook them into the fuel system,
and the Rotax will happily suck fuel from them for a
few more hours ! We've done that on some very long trips !

Soooooo....... if you have a choice, and are going for
a Rotax 912, you are far better off to just build for 2 bays/side.
A bonus is that you will save a few pounds, and some work, in
the smaller tank skins & fewer rivets.

That said, I've been doing a lot of thinking about ways
to reduce the capacity of existing large tanks - like
inserting a rubber bladder, or ping-pong balls, to fill
space .... I'm sure we can come up with something easy !

And Keith - don't worry toooo much - she'll fly just fine,
even the way you have built her -- should weigh between
725 - 825 lb, tops. Jim & Tom both had a great Ramble
this summer, through the Rockies, with Rotax 912's,
and came home with some big smiles !!! :-) :-)
(especially when they saw the gas bills - less than HALF
the cost of running the O-320 !!)
You will still have the option of going to an O-320, or
a new diesel, if one should come along later .... that's
the beauty of the Rebel - you're not stuck with just ONE engine !

--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Wednesday 17 October 2007 19:21, David Jackson wrote:
The only time you have too much fuel is when you are on fire. There is
nothing to stop you from only carrying the fuel you require for the flight
you have planned. Having the larger tanks available will give you more
options if you travel somewhere solo, you can fill the tanks and have an
extra degree of safety to find an alternate or use the fuel to fly longer
legs on a trip.

Dave J> Date: Wed, 17 Oct 2007 11:32:11 -0700> From:
im_planecrazy@yahoo.com> Subject: Re: [rebel-builders] Rebel empty weight
with Rotax> To: rebel-builders@dcsol.com> > Jim,> > Unfortunately I have
already done the 3-bays fuel tank. Is it that much of a con to using the 44
gallon wings. I understand that there would be WAY more fuel than a guy
needs but other than that is there much problem?> How do you like the
performance with the Rotax?> If you want to mail my home email that is ok
im_planecrazy at yahoo dot com.> > Keith> > Jim Cole
wrote:> Hi Keith, my Rebel came in at 821 empty weight with the 912ULS
installed.> I used the Fife wing tips but do not have the cuffs. I also
have the 44 gal> tanks and if I was doing it over again I wouldn't go three
bays I would use> only two.> > Cheers> Jim > Rebel 333> > On 10/17/2007
12:58 PM, "Mike Davis" wrote:> > > Have you considered an IO-240?> > > >
Mike> > > > ----- Original Message -----> > From: "Keith Leit ch" > > To:
"Murphy Rebel Builde
r
s" > > Sent: Wednesday, October 17, 2007 8:46 AM> > Subject:
[rebel-builders] Rebel empty weight with Rotax> > > > > >> Well guys, I'm
still about 50 years from completeing my Rebel and with> >> fuel prices
going through the roof I have been relooking at installing the> >> Rotax in
my Rebel "when" I get to that point. The problem I feel is a may> >> be a
little on the heavy side to use this engine. I have been spraying> >> every
piece, prior to assembly, with 2-part epoxy primer as I plan on> >> putting
it on floats. I also built the wings with the 44 gallon tanks, and> >> have
plans to install Angus's cuffed leading edge. I wasn't as worried> >> about
the weight as I originally was installing an O-320. BUt now I am> >>
wondering if I will end up with a very heavy Rebel to be powered by the> >>
Rotax.> >> > >> What is the average completed empty weight of a Rebel with
the Rotax?> >> > >> Also, I have another question for the airplane gurus on
here. I have a> >> 7AC Champ with an 0-235 in it and am thinking o
f
putting an Aeromatic prop> >> on it. Has anyone used one of these props?
Also, has anyone ever thought> >> about useing one on a Rebel? Just asking
because I may still have to build> >> with the O 320.> >> > >> Thank you,>
Keith R661> >> > >> > >>



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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by WALTER KLATT
Yeah, if it is the medical, go with the Rotax. That's the beauty of the Rebel. It works great with small engines, as well as for those of us (;>)) that need more power. The 912 is also a very fine engine, and will probably cost less in maintenance in the long haul.

Walter

----- Original Message -----
From: Keith Leitch <im_planecrazy@yahoo.com>
Date: Wednesday, October 17, 2007 2:31 pm
Subject: Re: [rebel-builders] Rebel empty weight with Rotax
To: rebel-builders@dcsol.com
Bob,

I recall you saying something similar to this awhile ago
on the site, that was the reason for the question. But I am past
the point of being able to only go 2-bays. But like you
said....maybe I can put something in there to fill up space. I
guess what I need to do is put some type of big inspection cover
on the top of the tank so I can do such a thing.

The reason for my question may have been a little
misleading...the fuel burn is not the main reason for going the
Rotax route...I am planning on not renewing my medical next year
when it becomes due and going the Sport Pilot route. I really
don't want to but as everyone knows...things happen in life that
we have no control over.

Also, I think I responded to Walter and he said don't use
the cuffs....my reason for using them besides the performance
benefit is my wife was helping me moved the leading adge and I
tried telling her how to handle the sheet and of course being
the wife...she thought she had a better idea and both pieses
buckled in the middle leaving huge creases. I was pissed!!!
Since I had planned on using the cuff anyways I figured it'll
cover them up. :(

Keith

Bob Patterson <beep@sympatico.ca> wrote:

Hi Dave !

Actually, there are several very good reasons why it's much better
to have only 2 bays/side on the Rebel .... especially considering
that a stock 3 bay setup is already almost 50 % more fuel than
a C-172 ! Two bays/side will still give you approx. 28 - 32
gallons -
considering the Rotax will only burn 5 gal./hr if you beat it,
that's still almost 6 hours endurance !!

If you want to fly light, with a couple of hours fuel -
say 10 gallons - imagine how deep that will be, spread out
over 6 bays total ..... not a lot of head pressure there !
Now, if you do a steep turn, with a bit of slip or skid,
you might uncover a fuel outlet ...... gee, it's quiet !! :-(

If you park it with that 10 gallons aboard, you have a
LOT of air in there, and a lot of surface - there'll be more
evaporation, and more condensation - could end up with
a lot of water in those almost-empty tanks ....
..... water doesn't burn well ! :-(

If you DO fill up those regular tanks, you will be dragging
along 300 lb..... = another passenger, and some luggage !!!
(or more than a set of floats ! )

If you ever DO have a really long trip, you can always
put one or two 5 gallon cans in the back, and, if you really
can't stop, you can hook them into the fuel system,
and the Rotax will happily suck fuel from them for a
few more hours ! We've done that on some very long trips !

Soooooo....... if you have a choice, and are going for
a Rotax 912, you are far better off to just build for 2 bays/side.
A bonus is that you will save a few pounds, and some work, in
the smaller tank skins & fewer rivets.

That said, I've been doing a lot of thinking about ways
to reduce the capacity of existing large tanks - like
inserting a rubber bladder, or ping-pong balls, to fill
space .... I'm sure we can come up with something easy !

And Keith - don't worry toooo much - she'll fly just fine,
even the way you have built her -- should weigh between
725 - 825 lb, tops. Jim & Tom both had a great Ramble
this summer, through the Rockies, with Rotax 912's,
and came home with some big smiles !!! :-) :-)
(especially when they saw the gas bills - less than HALF
the cost of running the O-320 !!)
You will still have the option of going to an O-320, or
a new diesel, if one should come along later .... that's
the beauty of the Rebel - you're not stuck with just ONE engine !

--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Wednesday 17 October 2007 19:21, David Jackson wrote:
The only time you have too much fuel is when you are on fire.
There is
nothing to stop you from only carrying the fuel you require
for the flight
you have planned. Having the larger tanks available will give
you more
options if you travel somewhere solo, you can fill the tanks
and have an
extra degree of safety to find an alternate or use the fuel to
fly longer
legs on a trip.

Dave J> Date: Wed, 17 Oct 2007 11:32:11 -0700> From:
im_planecrazy@yahoo.com> Subject: Re: [rebel-builders] Rebel
empty weight
with Rotax> To: rebel-builders@dcsol.com> > Jim,> >
Unfortunately I have
already done the 3-bays fuel tank. Is it that much of a con to
using the 44
gallon wings. I understand that there would be WAY more fuel
than a guy
needs but other than that is there much problem?> How do you
like the
performance with the Rotax?> If you want to mail my home email
that is ok
im_planecrazy at yahoo dot com.> > Keith> > Jim Cole
wrote:> Hi Keith, my Rebel came in at 821 empty weight with
the 912ULS
installed.> I used the Fife wing tips but do not have the
cuffs. I also
have the 44 gal> tanks and if I was doing it over again I
wouldn't go three
bays I would use> only two.> > Cheers> Jim > Rebel 333> > On
10/17/2007> 12:58 PM, "Mike Davis" wrote:> > > Have you
considered an IO-240?> > > >
Mike> > > > ----- Original Message -----> > From: "Keith Leit
ch" > > To:
"Murphy Rebel Builde
r
s" > > Sent: Wednesday, October 17, 2007 8:46 AM> > Subject:
[rebel-builders] Rebel empty weight with Rotax> > > > > >>
Well guys, I'm
still about 50 years from completeing my Rebel and with> >>
fuel prices
going through the roof I have been relooking at installing
the> >> Rotax in
my Rebel "when" I get to that point. The problem I feel is a
may> >> be a
little on the heavy side to use this engine. I have been
spraying> >> every
piece, prior to assembly, with 2-part epoxy primer as I plan
on> >> putting
it on floats. I also built the wings with the 44 gallon tanks,
and> >> have
plans to install Angus's cuffed leading edge. I wasn't as
worried> >> about
the weight as I originally was installing an O-320. BUt now I
am> >>
wondering if I will end up with a very heavy Rebel to be
powered by the> >>
Rotax.> >> > >> What is the average completed empty weight of
a Rebel with
the Rotax?> >> > >> Also, I have another question for the
airplane gurus on
here. I have a> >> 7AC Champ with an 0-235 in it and am
thinking o
f
putting an Aeromatic prop> >> on it. Has anyone used one of
these props?
Also, has anyone ever thought> >> about useing one on a Rebel?
Just asking
because I may still have to build> >> with the O 320.> >> > >>
Thank you,>



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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Bob Patterson
Hi Keith !

You might not need a big inspection cover if we can come up with
something inflatable that can be stuffed in through the filler ....
many tanks have rubberized bladders - maybe there's a small one
that would fit. Or a sturdy weather balloon ??? Must be something ...

The key to Sport Pilot is - you must be careful to register the
Rebel at 1320 lb. or less .... I'm thinking 1,319 !! ;-) If it is
registered Experimental (best way, I think ...), then you can always
RAISE it later, with a bigger engine - of couse, it'll no longer
EVER be able to be Sport Pilot legal -- but you'd only do that if
you got a licence again, or sold it - at least it would have more
resale value than just SP....

The cuffs will only add about 13 lb. .... and a bit of strength,
so, in your case, maybe not too big a problem. You are not the
first to kink the leading edges - best way is to slide a 2 x 4 under
them & lift the wood ...... I know, too late now ! :-(

Anyway, you will still have a Rebel you can fly & have fun with !

--
......bobp
http://www.prosumers.ca
http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Wednesday 17 October 2007 21:31, Keith Leitch wrote:
Bob,

I recall you saying something similar to this awhile ago on the site,
that was the reason for the question. But I am past the point of being able
to only go 2-bays. But like you said....maybe I can put something in there
to fill up space. I guess what I need to do is put some type of big
inspection cover on the top of the tank so I can do such a thing.

The reason for my question may have been a little misleading...the fuel
burn is not the main reason for going the Rotax route...I am planning on
not renewing my medical next year when it becomes due and going the Sport
Pilot route. I really don't want to but as everyone knows...things happen
in life that we have no control over.

Also, I think I responded to Walter and he said don't use the cuffs....my
reason for using them besides the performance benefit is my wife was
helping me moved the leading adge and I tried telling her how to handle the
sheet and of course being the wife...she thought she had a better idea and
both pieses buckled in the middle leaving huge creases. I was pissed!!!
Since I had planned on using the cuff anyways I figured it'll cover them
up. :(

Keith

Bob Patterson <beep@sympatico.ca> wrote:

Hi Dave !

Actually, there are several very good reasons why it's much better
to have only 2 bays/side on the Rebel .... especially considering
that a stock 3 bay setup is already almost 50 % more fuel than
a C-172 ! Two bays/side will still give you approx. 28 - 32 gallons -
considering the Rotax will only burn 5 gal./hr if you beat it,
that's still almost 6 hours endurance !!

If you want to fly light, with a couple of hours fuel -
say 10 gallons - imagine how deep that will be, spread out
over 6 bays total ..... not a lot of head pressure there !
Now, if you do a steep turn, with a bit of slip or skid,
you might uncover a fuel outlet ...... gee, it's quiet !! :-(

If you park it with that 10 gallons aboard, you have a
LOT of air in there, and a lot of surface - there'll be more
evaporation, and more condensation - could end up with
a lot of water in those almost-empty tanks ....
..... water doesn't burn well ! :-(

If you DO fill up those regular tanks, you will be dragging
along 300 lb..... = another passenger, and some luggage !!!
(or more than a set of floats ! )

If you ever DO have a really long trip, you can always
put one or two 5 gallon cans in the back, and, if you really
can't stop, you can hook them into the fuel system,
and the Rotax will happily suck fuel from them for a
few more hours ! We've done that on some very long trips !

Soooooo....... if you have a choice, and are going for
a Rotax 912, you are far better off to just build for 2 bays/side.
A bonus is that you will save a few pounds, and some work, in
the smaller tank skins & fewer rivets.

That said, I've been doing a lot of thinking about ways
to reduce the capacity of existing large tanks - like
inserting a rubber bladder, or ping-pong balls, to fill
space .... I'm sure we can come up with something easy !

And Keith - don't worry toooo much - she'll fly just fine,
even the way you have built her -- should weigh between
725 - 825 lb, tops. Jim & Tom both had a great Ramble
this summer, through the Rockies, with Rotax 912's,
and came home with some big smiles !!! :-) :-)
(especially when they saw the gas bills - less than HALF
the cost of running the O-320 !!)
You will still have the option of going to an O-320, or
a new diesel, if one should come along later .... that's
the beauty of the Rebel - you're not stuck with just ONE engine !



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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Aurele Lavigne
Keith, my Rebel was build super light under AULA. It came in at 601 lbs with
the 912.

I have two buddies with the slightly heavier Rebel, both 1450 gross models,
one with the 80 hp and the other with the 100 hp. One comes in at about 645
empty and the other at 685 lbs.

All three on floats, add another 150 to 200 lbs depending on type and size
of floats. While both are heavier empty weights, the other 80 hp Rebel
actually performs better than mine, it appears due to the byancy of his
floats.

The 100hp Rebel will take all the weight thrown at it, full of fuel, 2
passengers plus some gear in the back and is off the water virtually
effortlessly at 50 kts and cruises about 10 kts faster than mine.

If you empty weight is in the 700 lb range with the 912 and you are in the
200 lb range and want to fly with a passenger and long range fuel, the 100hp
is the only way to go, IMHO, as Bob would say.

Aurele
Rebel 063

----- Original Message -----
From: "Keith Leitch" <im_planecrazy@yahoo.com>
To: "Murphy Rebel Builders" <rebel-builders@dcsol.com>
Sent: Wednesday, October 17, 2007 12:46 PM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Jim Cole
Hi Aurele, the next step for me is to look at floats. What kind(s)) are
being used on the three different planes?

Thanks
Jim


On 10/17/2007 1:57 PM, "Aurele Lavigne" <acerebel@ntl.sympatico.ca> wrote:
Keith, my Rebel was build super light under AULA. It came in at 601 lbs with
the 912.

I have two buddies with the slightly heavier Rebel, both 1450 gross models,
one with the 80 hp and the other with the 100 hp. One comes in at about 645
empty and the other at 685 lbs.

All three on floats, add another 150 to 200 lbs depending on type and size
of floats. While both are heavier empty weights, the other 80 hp Rebel
actually performs better than mine, it appears due to the byancy of his
floats.

The 100hp Rebel will take all the weight thrown at it, full of fuel, 2
passengers plus some gear in the back and is off the water virtually
effortlessly at 50 kts and cruises about 10 kts faster than mine.

If you empty weight is in the 700 lb range with the 912 and you are in the
200 lb range and want to fly with a passenger and long range fuel, the 100hp
is the only way to go, IMHO, as Bob would say.

Aurele
Rebel 063

----- Original Message -----
From: "Keith Leitch" <im_planecrazy@yahoo.com>
To: "Murphy Rebel Builders" <rebel-builders@dcsol.com>
Sent: Wednesday, October 17, 2007 12:46 PM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing the
Rotax in my Rebel "when" I get to that point. The problem I feel is a may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks, and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to build
with the O 320.

Thank you,
Keith R661


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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by Aurele Lavigne
Never did get the maker on my set, simalar to Edos', my best guess is 1220's
and weigh about 150lbs net after gear removed. Second 912 is on a set of
aluminum floats made in Quebec someswhere, called Easy Lift, sized around
1320-1400, weigh about 200 lbs, a little heavier, but performing very well.
The 912's is on Full Lotus 1650's and I really liked the performance, didn't
get weight, but sure performed nicely with the 100 hp.

Hope this helps,

Aurele

----- Original Message -----
From: "Jim Cole" <jcole@rangroup.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, October 18, 2007 8:58 AM
Subject: Re: [rebel-builders] Rebel empty weight with Rotax

Hi Aurele, the next step for me is to look at floats. What kind(s)) are
being used on the three different planes?

Thanks
Jim


On 10/17/2007 1:57 PM, "Aurele Lavigne" <acerebel@ntl.sympatico.ca> wrote:
Keith, my Rebel was build super light under AULA. It came in at 601 lbs
with
the 912.

I have two buddies with the slightly heavier Rebel, both 1450 gross
models,
one with the 80 hp and the other with the 100 hp. One comes in at about
645
empty and the other at 685 lbs.

All three on floats, add another 150 to 200 lbs depending on type and
size
of floats. While both are heavier empty weights, the other 80 hp Rebel
actually performs better than mine, it appears due to the byancy of his
floats.

The 100hp Rebel will take all the weight thrown at it, full of fuel, 2
passengers plus some gear in the back and is off the water virtually
effortlessly at 50 kts and cruises about 10 kts faster than mine.

If you empty weight is in the 700 lb range with the 912 and you are in
the
200 lb range and want to fly with a passenger and long range fuel, the
100hp
is the only way to go, IMHO, as Bob would say.

Aurele
Rebel 063

----- Original Message -----
From: "Keith Leitch" <im_planecrazy@yahoo.com>
To: "Murphy Rebel Builders" <rebel-builders@dcsol.com>
Sent: Wednesday, October 17, 2007 12:46 PM
Subject: [rebel-builders] Rebel empty weight with Rotax

Well guys, I'm still about 50 years from completeing my Rebel and with
fuel prices going through the roof I have been relooking at installing
the
Rotax in my Rebel "when" I get to that point. The problem I feel is a
may
be a little on the heavy side to use this engine. I have been spraying
every piece, prior to assembly, with 2-part epoxy primer as I plan on
putting it on floats. I also built the wings with the 44 gallon tanks,
and
have plans to install Angus's cuffed leading edge. I wasn't as worried
about the weight as I originally was installing an O-320. BUt now I am
wondering if I will end up with a very heavy Rebel to be powered by the
Rotax.

What is the average completed empty weight of a Rebel with the Rotax?

Also, I have another question for the airplane gurus on here. I have a
7AC Champ with an 0-235 in it and am thinking of putting an Aeromatic
prop
on it. Has anyone used one of these props? Also, has anyone ever thought
about useing one on a Rebel? Just asking because I may still have to
build
with the O 320.

Thank you,
Keith R661


__________________________________________________
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Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com



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[rebel-builders] Rebel empty weight with Rotax

Posted: Sun Feb 19, 2012 4:01 pm
by bransom
These low weights are tremendous bragging points on the Rebel. Just
phenomenal to have so much room with all the weight/structure in right
places and the performance that comes with it. Speaks very well for the
O-320 Rebels too, just a bit up the HP scale. IIRC, a Kitfox 5,6,7 cannot
be built for under 720lbs and has a lot less room. Not to dig those planes
(I almost bought one), but that comparison struck me when I decided to go
Rebel ...with a cause. :)
-Ben
Keith, my Rebel was build super light under AULA. It came in at 601 lbs with
the 912.

I have two buddies with the slightly heavier Rebel, both 1450 gross models,
one with the 80 hp and the other with the 100 hp. One comes in at about 645
empty and the other at 685 lbs.

Aurele
Rebel 063

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