Rebel Bungee Gear

Mike Kimball · Post by **Mike Kimball** » Fri Feb 17, 2012 10:42 pm

Tire pressure sure made a huge difference with my Renegade Spirit! The
tires were designed for 15 psi, but if I put 15 psi in them I would always
bounce my landings. I let them down to 5 psi and my landings were smooth as
glass from then on. Never had any problems with tires rotating on the rims.
Of course, a Renegade takes off and lands very slow. Probably more of a
problem the faster the airplane is.

Mike Kimball
SR #044

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of Bob
Patterson
Sent: Wednesday, January 15, 2003 8:09 AM
To: murphy-rebel@dcsol.com
Subject: Re: Rebel bungee gear

Hi Ian !
The piece of string sounds like a good solution ! Rebel
builders are inventive !! ;-)

The only caution with low 'tyre' pressure is - if it's too
low, the tires can rotate, pulling the tube, and possibly yank the
filler stem off !! (voice of sad experience ...) :-(

It could just be that your landings are sooooo smoooooth that
the bungies don't have to move ! ;-^) :-)

You're right about the bungies being simple, light, and
strong - just like the Rebel. Guess that's why they were chosen ! :-)

Glad you're enjoying the Rebel - one of these years I'll
have one set up like yours, with the 912-S. My 'hot rod' O-320 is fun,
but, as I age, I'll want something a lot less 'thirsty'.... ;-)

.....bobp

-----------------------------orig.---------------------------------
At 12:10 AM 1/16/03 +1100, you wrote:

G'day Bob
Thanks for the reply.

The tyres (tires) that I have are something like 15x6. They are the

standard

MAM issue ,and I do run low pressure in them, but I will let them down to
12/14 as you suggest.

I never considered that it would wear the gear out if the bungies are
loose. But it seems to me that there is no give in them at all.

I have been trying to think of a way to see if the bungies do move, and it
suddenly occurred to me that all I need to do is tie a string with some
slack in it between the bungie bolts. Then when I do a few landings I could
check if the string has broken. Hows that for an idea.?

The die spring suspension seems a good thing, but the bungies are cheap,
light and simple.

Thanks again and regards

Ian Donaldson

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Rick Harper · Post by **Rick Harper** » Fri Feb 17, 2012 10:43 pm

G'day Bob ....

Glad to have you "down here" ... when & if " you can come ...

I've been doing some Luthier work for a company that imports a lot of
Canadian built guitars .. and last week the manager of the firm said
that he might send me to Canada to talk with the manufacturing people
direct .... so I said ... BY THE WEST COAST THANKS !!! :-)

So you never know, I might just beat you to the punch ! :-)

Rick & Wendy
541R
----- Original Message -----
From: Bob Patterson
To: murphy-rebel@dcsol.com
Sent: Thursday, January 16, 2003 4:18 AM
Subject: Re: Rebel bungee gear

Hi Rick !

Thanks to Roger, you've got the contact details....

I have a set of Gord's bushings on my Rebel, to compliment
Wayne's die spring gear legs, and they are very nicely done. The cost
shouldn't be toooo painful, given that our Canuck Buck is close to
par with yours !

Sounds like you're really enjoying your Rebel !! I sure
would like to come down there & fly along on one of your trips -
they sound a lot more 'exciting' than the Rambles !! ;-)
You sure fly over some rough country ! Maybe one of these years
Anna & I will come for one of those 'spam can' fly-yourself tours
of OZ - sure sounds like a GREAT vacation !!

.....bobp

-------------------------------orig.--------------------------------
At 04:11 PM 1/15/03 +1100, you wrote:

G'day Bob !

Can you give me contact details for Gordon Mohr ?!? ... I have die
springs on Rebel 541R .... and the ride / landings are GREAT - Soft &

Smooth ...But, obviously the gear "works" up & down a fair bit ....

I've

toyed with the idea of making my own bushes ,... but if Gordon's are
tried & proven, I'll drop him a line.

PS Done nearly 200 hrs (and about 500 landings) in 18 months so far

...

and the next 4 months will see another 50 to 70 hours on the VDO !

and

all looks good so far :-)

Flying from Sydney to Perth & back in late April (same distance as

coast

to coast in Canada or the US )

Rick & Wendy Harper
541R
----- Original Message -----
From: Bob Patterson
To: murphy-rebel@dcsol.com
Sent: Wednesday, January 15, 2003 6:50 AM
Subject: Re: Rebel bungee gear

Hi Ian !

I recall Darryl Murphy saying that the bungee gear is only
supposed to move to prevent structural damage to the fuselage. The
tires are the main shock absorbers - that's why I like the fat DICO
or CARLYLE tires so much !! :-) These are available from

Murphy,

at about half the cost of the skinnier 'aircraft' tires, and are
well suited to a 912 Rebel !

Do not slacken them up so the gear moves when taxying - if
the gear moves a lot, you will wear through the tops of the gear
legs very quickly. Gord Mohr makes a beautiful set of fitting to
go into the tops of the gear legs, with brass bushings inserted,
to prevent this wear - and they are essential if you go to a
die-spring setup to replace the bungees. The die-spring gear (IF

the

springs are carefully selected for rate & load) will give you
THE best ride in a Rebel. The Cessna-style spring gear tends to
"waddle", but the die spring gear just gives a great, smooth ride -
but everything is moving all the time, so lubrication & bushings
are essential.

Best suggestion for now - use the fat tires, and lower the
air pressure a bit (they work great at 12-14 lb.)......

....bobp

---------------------------------orig.----------------------------------

At 11:38 PM 1/14/03 +1100, you wrote:
G'day

I have a Rebel with a 100hp Rotax, and it is fitted with the
standard
bungee gear.

Well not really standard as I have fitted 8 of the 9044 factory

made

bungee
rings.

Now my problem is that it appears that the legs do not move at

all.

No
matter how I load the plane, or in fact jump around inside, the

legs

just
don't move.

What experience do others have? How many rings is enough? Should

the

legs
move while taxying?

I look forward to hearing your responses.

Regards

Ian Donaldson

PS the temperature here where I live in Australia is currently

37o.

That's
centigrade!

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Ian Donaldson · Post by **Ian Donaldson** » Fri Feb 17, 2012 10:43 pm

G'day Bob

Hi Ian !
The piece of string sounds like a good solution ! Rebel
builders are inventive !! ;-)

That's all that I ccould think of to see if the bungees had any movement at
all.
I will give it a try next weekend and I will let you know what occurs.

The only caution with low 'tyre' pressure is - if it's too
low, the tires can rotate, pulling the tube, and possibly yank the
filler stem off !! (voice of sad experience ...) :-(

Been there done that!

It could just be that your landings are sooooo smoooooth that
the bungies don't have to move ! ;-^) :-)

Not really.! I have had every style possible. Greasers to the ten foot drop!
I have been surprised that IU have never broken anything. A real tough set
up.

Glad you're enjoying the Rebel - one of these years I'll
have one set up like yours, with the 912-S. My 'hot rod' O-320 is fun,
but, as I age, I'll want something a lot less 'thirsty'.... ;-)

I'm happy enough. With no spats and no strut fairings it goes at 80 knots at
18.5 liters an hour.

regards

Ian Donaldson

.....bobp

-----------------------------orig.---------------------------------
At 12:10 AM 1/16/03 +1100, you wrote:
G'day Bob
Thanks for the reply.

The tyres (tires) that I have are something like 15x6. They are the

standard

MAM issue ,and I do run low pressure in them, but I will let them down to
12/14 as you suggest.

I never considered that it would wear the gear out if the bungies are
loose. But it seems to me that there is no give in them at all.

I have been trying to think of a way to see if the bungies do move, and

it

suddenly occurred to me that all I need to do is tie a string with some
slack in it between the bungie bolts. Then when I do a few landings I

could

check if the string has broken. Hows that for an idea.?

The die spring suspension seems a good thing, but the bungies are cheap,
light and simple.

Thanks again and regards

Ian Donaldson

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Ian Donaldson · Post by **Ian Donaldson** » Fri Feb 17, 2012 10:43 pm

G'day Mike

I will try lower pressures and see what happens.

Regards

Ian

Tire pressure sure made a huge difference with my Renegade Spirit! The
tires were designed for 15 psi, but if I put 15 psi in them I would always
bounce my landings. I let them down to 5 psi and my landings were smooth

as

glass from then on. Never had any problems with tires rotating on the

rims.

Of course, a Renegade takes off and lands very slow. Probably more of a
problem the faster the airplane is.

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Gordon Mohr · Post by **Gordon Mohr** » Fri Feb 17, 2012 10:43 pm

What are the odds of someone named HARPER ending up being a luthier? :-)

At 04:07 PM 16/01/03 +1100, you wrote:

G'day Bob ....

Glad to have you "down here" ... when & if " you can come ...

I've been doing some Luthier work for a company that imports a lot of
Canadian built guitars .. and last week the manager of the firm said
that he might send me to Canada to talk with the manufacturing people
direct .... so I said ... BY THE WEST COAST THANKS !!! :-)

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Bob Patterson · Post by **Bob Patterson** » Fri Feb 17, 2012 10:43 pm

Hey - that would be GREAT !!! Hope we can meet up at Arlington !!

.....bobp

----------------------------------orig.-----------------------------------
At 04:07 PM 1/16/03 +1100, you wrote:

G'day Bob ....

Glad to have you "down here" ... when & if " you can come ...

I've been doing some Luthier work for a company that imports a lot of
Canadian built guitars .. and last week the manager of the firm said
that he might send me to Canada to talk with the manufacturing people
direct .... so I said ... BY THE WEST COAST THANKS !!! :-)

So you never know, I might just beat you to the punch ! :-)

Rick & Wendy
541R
----- Original Message -----
From: Bob Patterson
To: murphy-rebel@dcsol.com
Sent: Thursday, January 16, 2003 4:18 AM
Subject: Re: Rebel bungee gear

Hi Rick !

Thanks to Roger, you've got the contact details....

I have a set of Gord's bushings on my Rebel, to compliment
Wayne's die spring gear legs, and they are very nicely done. The cost
shouldn't be toooo painful, given that our Canuck Buck is close to
par with yours !

Sounds like you're really enjoying your Rebel !! I sure
would like to come down there & fly along on one of your trips -
they sound a lot more 'exciting' than the Rambles !! ;-)
You sure fly over some rough country ! Maybe one of these years
Anna & I will come for one of those 'spam can' fly-yourself tours
of OZ - sure sounds like a GREAT vacation !!

.....bobp

-------------------------------orig.--------------------------------
At 04:11 PM 1/15/03 +1100, you wrote:
G'day Bob !

Can you give me contact details for Gordon Mohr ?!? ... I have die
springs on Rebel 541R .... and the ride / landings are GREAT - Soft &

Smooth ...But, obviously the gear "works" up & down a fair bit ....
I've
toyed with the idea of making my own bushes ,... but if Gordon's are
tried & proven, I'll drop him a line.

PS Done nearly 200 hrs (and about 500 landings) in 18 months so far
...
and the next 4 months will see another 50 to 70 hours on the VDO !
and
all looks good so far :-)

Flying from Sydney to Perth & back in late April (same distance as
coast
to coast in Canada or the US )

Rick & Wendy Harper
541R
----- Original Message -----
From: Bob Patterson
To: murphy-rebel@dcsol.com
Sent: Wednesday, January 15, 2003 6:50 AM
Subject: Re: Rebel bungee gear

Hi Ian !

I recall Darryl Murphy saying that the bungee gear is only
supposed to move to prevent structural damage to the fuselage. The
tires are the main shock absorbers - that's why I like the fat DICO
or CARLYLE tires so much !! :-) These are available from
Murphy,
at about half the cost of the skinnier 'aircraft' tires, and are
well suited to a 912 Rebel !

Do not slacken them up so the gear moves when taxying - if
the gear moves a lot, you will wear through the tops of the gear
legs very quickly. Gord Mohr makes a beautiful set of fitting to
go into the tops of the gear legs, with brass bushings inserted,
to prevent this wear - and they are essential if you go to a
die-spring setup to replace the bungees. The die-spring gear (IF
the
springs are carefully selected for rate & load) will give you
THE best ride in a Rebel. The Cessna-style spring gear tends to
"waddle", but the die spring gear just gives a great, smooth ride -
but everything is moving all the time, so lubrication & bushings
are essential.

Best suggestion for now - use the fat tires, and lower the
air pressure a bit (they work great at 12-14 lb.)......

....bobp

---------------------------------orig.----------------------------------

At 11:38 PM 1/14/03 +1100, you wrote:
G'day

I have a Rebel with a 100hp Rotax, and it is fitted with the
standard
bungee gear.

Well not really standard as I have fitted 8 of the 9044 factory
made
bungee
rings.

Now my problem is that it appears that the legs do not move at
all.
No
matter how I load the plane, or in fact jump around inside, the
legs
just
don't move.

What experience do others have? How many rings is enough? Should
the
legs
move while taxying?

I look forward to hearing your responses.

Regards

Ian Donaldson

PS the temperature here where I live in Australia is currently
37o.
That's
centigrade!

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