Rebel brakes

allsure · Post by **allsure** » Fri Feb 17, 2012 9:37 pm

G'day

I have encountered a problem with the way that my foot fits on the left hand rudder pedal. When my foot is placed on the rudder pedal, my toes are resting on the brake pedal and in fact may be holding the brake on.

What I would like to do is shift the rudder cable over to the left, say about 1 1/2 '', so that I could slide my foot over and clear the brake pedal.

Has anyone else encountered this problem, or is it just that i have "King Kong" sized feet?

Regards

Ian Donaldson

Bob Patterson · Post by **Bob Patterson** » Fri Feb 17, 2012 9:37 pm

Hi Ian !

You're not alone ! Most of us just slide our feet down to
clear the brakes for landing.....

There is an advantage to adding a piece of tubing to the
side of the rudder pedal to move the cable to the outside, though.
Many builders do that here because it reduces the angle on the cable
to the first Delrin guide on the fuse side. (Some inspectors here
feel the angle is big enough to necessitate a pulley there - what
a pain THAT would be !!)

Keep rivetting - it REALLY <IS> worth it !! :-)

.....bobp

-------------------------------orig.-----------------------------------
At 10:52 PM 1/3/02 +1100, you wrote:

G'day

I have encountered a problem with the way that my foot fits on the left

hand rudder pedal. When my foot is placed on the rudder pedal, my toes are
resting on the brake pedal and in fact may be holding the brake on.

What I would like to do is shift the rudder cable over to the left, say

about 1 1/2 '', so that I could slide my foot over and clear the brake pedal.

Has anyone else encountered this problem, or is it just that i have "King

Kong" sized feet?

Regards

Ian Donaldson
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<STYLE></STYLE>
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<DIV><FONT size=2>G'day</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I have encountered a problem with the way that my foot
fits on the left hand rudder pedal. </FONT><FONT size=2>When my foot is
placed on the rudder pedal, my toes are resting on the brake pedal and in
fact may be holding the brake on.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>What I would like to do is shift the rudder cable over to

the

left, say about  1 1/2 '', so that I could slide my foot over and

clear the

brake pedal.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Has anyone else encountered this problem, or is it just

that i

have "King Kong" sized feet?</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2>Regards</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Ian Donaldson</FONT></DIV></BODY></HTML>

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allsure · Post by **allsure** » Fri Feb 17, 2012 9:37 pm

G'day Bob

Thanks for the reply.

I will see just how I can go about adding an extension to the rudder pedal.
That seems like a good fix to me!

Regards

Ian Donaldson

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Gordon Mohr · Post by **Gordon Mohr** » Fri Feb 17, 2012 9:37 pm

I'm wondering how much extra stress is placed on the rudder pedal assembly,
especially the welded joints, by extending the end of the tube to move the
cable further outboard. Trace out the load path, especially for the right
rudder. I didn't like the cable angle either but I also didn't like the
cable mounted to the end of the tube. My Rebel has the rudder cables
attached in the middle, with the cables running down the centre of the
fuselage floor along side the elevator cables.

Regards, Gordon Mohr #222
gmohr@telus.net

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Wayne G. O'Shea · Post by **Wayne G. O'Shea** » Fri Feb 17, 2012 9:37 pm

You've got a good point Gordon! I have seen 3 Zenair CH701's that broke the
left pedal arm off. Luckily my Father-in-law's did so as he was turning
around at the end of our strip, preparing for take off. The other two were
in the air and luckily made successful forced landings. That is one pitfall
of Zenairs all "flying" rudder/stabilizer. If the cables go loose it becomes
a fluttering nightmare! The only way to fly it is to hold the other pedal to
the floor to try and hold the rudder in one place and use full opposite
stick to keep going straight. Next find something flat quick because you are
now going down at 1000+FPM.

I don't think it's as much of an issue with the Rebel though, as you are
only operating the rudder and tailwheel. The Zenairs are broken by forcing
the nose wheel to turn (direct positive attachment) before you start moving
and their pedal assemblies are mfg'd from lighter/smaller diameter tubing.

You have definitely taken care of the problem for good with yours though,
going off the center pedals. I haven't noticed any deformation of the pedals
in mine, or any I have worked on, and this is a normal area for me to
inspect after the experience with the 701's.

Take care,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: "Gordon Mohr" <gmohr@telus.net>
To: <murphy-rebel@dcsol.com>
Sent: Friday, January 04, 2002 12:48 PM
Subject: Re: Rebel brakes

I'm wondering how much extra stress is placed on the rudder pedal

assembly,

especially the welded joints, by extending the end of the tube to move the
cable further outboard. Trace out the load path, especially for the right
rudder. I didn't like the cable angle either but I also didn't like the
cable mounted to the end of the tube. My Rebel has the rudder cables
attached in the middle, with the cables running down the centre of the
fuselage floor along side the elevator cables.

Regards, Gordon Mohr #222
gmohr@telus.net

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David L. Tuck · Post by **David L. Tuck** » Sun Feb 19, 2012 4:10 pm

Hi all: Hope you all didn't eat to much this week!
Guess I need to get to it.
In my kit 009 I'm missing the brake slave cylinders and the reservoir for the brakes, can anyone tell me what I should look for? and where I might find them? or maybe get from Murphy? Also what about dual brakes? what do I need for this option?

Progress on 009 is now at drilling the FUS 5's for the landing gear bolts for the spring gear?? Scared to drill!! Need to get it correct to say the least. Have been moving along and now getting ready to start laying out the controls for as much as I have done.

Is there any comments about instruments? TSO-D or NON TSO-D Does it really matter in EXP?
Thanks to all.
Dave T.
Rebel 009 here in cold Michigan!

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Your smile counts. The more smiles you share, the more we donate.

Ralph Baker · Post by **Ralph Baker** » Sun Feb 19, 2012 4:10 pm

David,
We are using the Matco integral reservoir master cylinders to avoid extra plumbing. I like the ACS screw in reservoir but be sure you have clearance to the firewall at full pedal deflection with full brakes applied. However, the Matco integral reservoir are longer between the mounting holes by 1/2 inch so if you use them account for the difference by lengthening the links.

I didn't like the MAM pedal design and copied the Just Aircraft / Bearhawk design as it it is much superior but a bunch of work. It requires 4 master cylinders with two sets of two plumbed in series for dual brakes. When completed I will try to figure out how to post pictures with my coal fired computer.

Either way, measure carefully before drilling pedal assembly into the floor including where the lower master cylinder anchor will mount. We have a bunch of extra holes for being wrong. Also, I would expand the size of the floor doublers to be sure the pedals final position falls on them. We have a particular concern because of short legged pilot wife. Put the seats and control column in and be certain the layout will work. Consider the cable layout and if/where pulleys or cable guides will be needed.
Ralph Baker
Elite 624E

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