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gross weight

Posted: Sat Feb 18, 2012 10:47 am
by heath
Sorry newbee mistake on the last post, I forgot to fill in the subject line.
So please refer to my previous posting, Thanks



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gross weight

Posted: Sat Feb 18, 2012 10:47 am
by Bob Patterson
Hi Heath !

Welcome to the list ! You don't have a problem - the 1450 lb
and 1650 lb Rebel kits are THE SAME KIT !! The 1450 lb gross is a
"suggested" gross for the Rotax 912 80 hp. engine, suggested so that
you will get very satisfactory performance. I have flown Rebels with
the 80 hp. Rotax at 1550 lb, and the performance was more than enough
to satisfy Transport Canada climb test requirements - I'm sure that
even 1650 would pass. With the 100 hp. 912-S, you will have a great
performer !

You are correct, though, that the CG range tends to be farther
back with this light engine - possibly the factory will be making a
new mount to move the engine a few inches forward, and allow fitting the
Rotax factory exhaust system, for more power. You can help by putting
your battery on the firewall, and your ELT and fire extinguisher on
the front side panels, bringing all the extra weight forward. You
could also install the firewall backwards, to move the engine forward
a bit, and give a smooth air outlet at the bottom, for better cooling.
And you could also add Wayne's firewall stiffener plates, for strength
and a few more pounds foreward.

The factory also sells a 1057 lb. gross Rebel kit - this is the
old Canadian Advanced Ultralight kit, and not a good idea for most
folks. It has lighter, thinner spars and struts, and loses a lot
of strength for the few pounds lower empty weight....

I flew our old Rebel on Murphy 1500 straight floats, with the 80 hp
Rotax - it outperformed our 85 hp. Aeronca Super Chief, but was nowhere
near a Rebel with 150 hp... but it was adequate, and burned only 3 gph,
of auto fuel !! :-)

My next Rebel will be a 912-S standard Amateur-Built Rebel (1650),
and I will likely put it on Murphy 1500 amphibs at some point.
I've flown a standard Rebel on Murphy 1500 amphibs across Canada,
with a 100 hp Lycoming O-235-C2C - with 2 bad cylinders (about
70 hp ??) - not recommended, but I survived !! Given that
experience, I think the (over 120 lb) lighter 912-S should
give adequate performance - again, not as dazzling as an O-320
or O-360, BUT - adequate, and on only 4 or 5 gallons/hour of
car gas ! :-) (and a whole lot cheaper to maintain !)

Let me know when you are closer to ordering, and I'll help
you put it together .... (905) 457-5238 9 am - 10 pm 7 days

.....bobp

-------------------------------orig.-------------------------
On Thursday 28 July 2005 10:29 am, heath@dcsol.com wrote:
I am new to this site and plan on ordering a Rebel kit in the near future.
I
am not sure which gross weight version I should go with, the 1450 or 1650lb
version. My plans are to use a 100 hp Rotax 912s engine. I have read that
due to the lightness of the engine you probobly can't put much more than 100
lbs in the baggage area and still be within the CG range. I do plan to
install floats some time down the road. So could anyone help me in deciding
which one will give me the best performance and still work decent on
floats. Thanks, Heath



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gross weight

Posted: Sat Feb 18, 2012 10:47 am
by heath
Thanks Bobp, It sounds like we are talking about building one the same way.
I know it would not be a rocket but it sounds like it is feasable to build
one with the 912s and still put it on the 1500 floats. Thanks agian, Heath


On 8/2/2005 6:41 PM, BEEP@SYMPATICO.CA wrote to REBEL-BUILDERS:

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[192.168.1.100]>
-> for <rebel-builders@dcsol.com>; Tue, 2 Aug 2005 22:41:26 -0400
-> From: Bob Patterson <beep@sympatico.ca>
-> Reply-To: beep@sympatico.ca
-> Organization: PS & InterBIZ
-> To: rebel-builders@dcsol.com
-> Subject: Re: gross weight
-> Date: Tue, 2 Aug 2005 22:41:25 -0400
-> User-Agent: KMail/1.7.2
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-> In-Reply-To: <1122560964@dcsol.com>
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-> X-Virus-Assassin: Message filtered with wsAV v3.0.0 Build 001
->
->
-> Hi Heath !
->
-> Welcome to the list ! You don't have a problem - the 1450 lb
-> and 1650 lb Rebel kits are THE SAME KIT !! The 1450 lb gross is a
-> "suggested" gross for the Rotax 912 80 hp. engine, suggested so that
-> you will get very satisfactory performance. I have flown Rebels with
-> the 80 hp. Rotax at 1550 lb, and the performance was more than enough
-> to satisfy Transport Canada climb test requirements - I'm sure that
-> even 1650 would pass. With the 100 hp. 912-S, you will have a great
-> performer !
->
-> You are correct, though, that the CG range tends to be farther
-> back with this light engine - possibly the factory will be making a
-> new mount to move the engine a few inches forward, and allow fitting the
-> Rotax factory exhaust system, for more power. You can help by putting
-> your battery on the firewall, and your ELT and fire extinguisher on
-> the front side panels, bringing all the extra weight forward. You
-> could also install the firewall backwards, to move the engine forward
-> a bit, and give a smooth air outlet at the bottom, for better cooling.
-> And you could also add Wayne's firewall stiffener plates, for strength
-> and a few more pounds foreward.
->
-> The factory also sells a 1057 lb. gross Rebel kit - this is the
-> old Canadian Advanced Ultralight kit, and not a good idea for most
-> folks. It has lighter, thinner spars and struts, and loses a lot
-> of strength for the few pounds lower empty weight....
->
-> I flew our old Rebel on Murphy 1500 straight floats, with the 80 hp
-> Rotax - it outperformed our 85 hp. Aeronca Super Chief, but was nowhere
-> near a Rebel with 150 hp... but it was adequate, and burned only 3 gph,
-> of auto fuel !! :-)
->
-> My next Rebel will be a 912-S standard Amateur-Built Rebel (1650),
-> and I will likely put it on Murphy 1500 amphibs at some point.
-> I've flown a standard Rebel on Murphy 1500 amphibs across Canada,
-> with a 100 hp Lycoming O-235-C2C - with 2 bad cylinders (about
-> 70 hp ??) - not recommended, but I survived !! Given that
-> experience, I think the (over 120 lb) lighter 912-S should
-> give adequate performance - again, not as dazzling as an O-320
-> or O-360, BUT - adequate, and on only 4 or 5 gallons/hour of
-> car gas ! :-) (and a whole lot cheaper to maintain !)
->
-> Let me know when you are closer to ordering, and I'll help
-> you put it together .... (905) 457-5238 9 am - 10 pm 7 days
->
-> .....bobp
->
-> -------------------------------orig.-------------------------
-> On Thursday 28 July 2005 10:29 am, heath@dcsol.com wrote:
-> > I am new to this site and plan on ordering a Rebel kit in the near
future.
-> I
-> > am not sure which gross weight version I should go with, the 1450 or
1650lb
-> > version. My plans are to use a 100 hp Rotax 912s engine. I have read
that
-> > due to the lightness of the engine you probobly can't put much more than
100
-> > lbs in the baggage area and still be within the CG range. I do plan to
-> > install floats some time down the road. So could anyone help me in
deciding
-> > which one will give me the best performance and still work decent on
-> > floats. Thanks, Heath
-> >
-> >
-> >
-> > -----------------------------------------------------------------
-> > List archives located at: https://www.dcsol.com/login
-> > username "rebel" password "builder"
-> > Subscription services located at:
-> > https://www.dcsol.com/public/code/html-subscribe.htm
-> > List administrator: mike.davis@dcsol.com
-> > -----------------------------------------------------------------
-> >
-> >
-> >





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