The Murphy Builders Site

Posted: **Fri Feb 17, 2012 5:18 pm**

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From: "Alister Yeoman" <yeoman@voyager.co.nz>
To: "Murphy Rebel" <murphy-rebel@dcsol.com>
Subject: Re: non-symmetrical fuel tanks
Date: Thu, 28 Jan 1999 14:59:19 +1300
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Hi Bob,

I do notice that my Rebel does definitely alter in aileron trim with
loading, especially with a third seat on one side at the back.

I like your idea of a bungee to take care of the problem, if you wanted to
make it a little more inconspicuous would it be possible to mount the
bungee along the push/pull tube down on the left hand side of the pilots
seat? There could be a slide type of mechanism to lock the bungee in the
desired position that could be easily accessed with the left hand.

What do you think?

Alister

----------

From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel <murphy-rebel@dcsol.com>
Subject: Re: non-symetrical fuel tanks
Date: Tuesday, January 26, 1999 5:17 PM

There are several Rebels with smaller tanks on the left - it DOES

help

with the balance. Also, you aren't carrying around 50 lb of unneeded
(mostly) fuel ...

I flew a Rebel from BC to Ontario that only had ONE 3 bay tank
on the right - it was ok, but a little awkward taxiing with 2 people &
baggage aboard with the tank full ! (It leaned !!)
No problem in flight, and fine when solo. The weight of the fuel
is not a BIG problem, but it IS more comfortable if you balance a bit.
I usually run the left tank down a bit first, then switch to right,
and back - always keeping more on right until just an emergency bit
left in the left side... It is more comfortable on cruise - the

ailerons

aren't heavy, but it's surprising how annoying it gets after a couple of
hours holding one wing up - I usually travel XC 'hands-off' !!

The easy solution for this is a small bungee cord attached to
the bottom of the torque tube, and wrapped around the stick. You slide
it up the stick to increase pull to the right, and down for less ...

.....bobp

-----------------------------orig.---------------------------------
At 05:06 PM 1/24/99 -0500, you wrote:
Hi
Does anybody have any regrets or opinions on non-symetrical fuel tanks.

After

much thought and waffling I am about to commit to two bays of fuel in

the left

wing. I put the normal 3 bays in the right wing. This is more than

enough fuel

for my Subaru Legacy powered Rebel (probably 6 or so gph) but I am a

little

concerned about the imbalance. Bobp mentioned once that some builders

with the

Rotax engine were going with one bay on the left and two bays on the

right. The

imbalance will costantly reduce as fuel is burned (assumining feeding

from both

tanks)...
As always, any comments are appreciated!
Ken R119

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Posted: **Fri Feb 17, 2012 5:18 pm**

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To: <murphy-rebel@dcsol.com> (Murphy Rebel)
From: Bob Patterson <bob.patterson@canrem.com>
Subject: Re: non-symmetrical fuel tanks
Message-Id: <E105ihK-00009F-00@mail2.toronto.istar.net>
Date: Wed, 27 Jan 1999 23:04:54 -0500

Sounds like it might work nicely - take a bit of work to make a nice
clamp/hook arrangement, but no biggie !! My way IS a little crude, but
it's simple and visible - and uses stanard bungee with hooks on ends.

I'm sure there must be some easy way to hook it on the side, or at
the back, as you suggest - maybe with some kind of lock knob & slider -
any input from the rest of you ????

The ailerons aren't that heavy, it's just a little annoying on
a long flight - I sometimes use a little 'leg' or 'knee' trim ...
that's when the bungee idea started - I just grabbed it from the baggage
& stuck it on.

.....bobp

-------------------------------orig.----------------------------------
At 02:59 PM 1/28/99 +1300, you wrote:

Hi Bob,

I do notice that my Rebel does definitely alter in aileron trim with
loading, especially with a third seat on one side at the back.

I like your idea of a bungee to take care of the problem, if you wanted to
make it a little more inconspicuous would it be possible to mount the
bungee along the push/pull tube down on the left hand side of the pilots
seat? There could be a slide type of mechanism to lock the bungee in the
desired position that could be easily accessed with the left hand.

What do you think?

Alister

----------
From: Bob Patterson <bob.patterson@canrem.com>
To: Murphy Rebel <murphy-rebel@dcsol.com>
Subject: Re: non-symetrical fuel tanks
Date: Tuesday, January 26, 1999 5:17 PM

There are several Rebels with smaller tanks on the left - it DOES
help
with the balance. Also, you aren't carrying around 50 lb of unneeded
(mostly) fuel ...

I flew a Rebel from BC to Ontario that only had ONE 3 bay tank
on the right - it was ok, but a little awkward taxiing with 2 people &
baggage aboard with the tank full ! (It leaned !!)
No problem in flight, and fine when solo. The weight of the fuel
is not a BIG problem, but it IS more comfortable if you balance a bit.
I usually run the left tank down a bit first, then switch to right,
and back - always keeping more on right until just an emergency bit
left in the left side... It is more comfortable on cruise - the
ailerons
aren't heavy, but it's surprising how annoying it gets after a couple of
hours holding one wing up - I usually travel XC 'hands-off' !!

The easy solution for this is a small bungee cord attached to
the bottom of the torque tube, and wrapped around the stick. You slide
it up the stick to increase pull to the right, and down for less ...

.....bobp

-----------------------------orig.---------------------------------
At 05:06 PM 1/24/99 -0500, you wrote:
Hi
Does anybody have any regrets or opinions on non-symetrical fuel tanks.
After
much thought and waffling I am about to commit to two bays of fuel in
the left
wing. I put the normal 3 bays in the right wing. This is more than
enough fuel
for my Subaru Legacy powered Rebel (probably 6 or so gph) but I am a
little
concerned about the imbalance. Bobp mentioned once that some builders
with the
Rotax engine were going with one bay on the left and two bays on the
right. The
imbalance will costantly reduce as fuel is burned (assumining feeding
from both
tanks)...
As always, any comments are appreciated!
Ken R119