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grant.corriveau(at)TELUS.
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 Posted: Sat Aug 02, 2008 6:09 am Post subject: Rudder pedals |
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Regarding the taildragger version, someone wrote:
the rudder peddles don't have the loading of
the nose wheel so it takes very little pressure on the peddles to deflect the
rudder.
I've often wondered how the nose-dragger model would handle if the rudder pedal links to the nose wheel were removed, or if the push-pull rods were replaced with springs (ala C-150) ...
The current setup does make for a relatively heavy rudder pedal feel.
Anyone tried this before?
[quote][b]
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Terry Phillips
Joined: 11 Jan 2006
Posts: 346
Location: Corvallis, MT
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| Posted: Sat Aug 02, 2008 1:07 pm Post subject: Rudder pedals |
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Grant
Check out
http://www.skyhawg.com/petals.html
for a spring loaded implementation on a 701. I don't know if those have been flown or not. Best check with the builder for actual results. If you build them, please let us know they work for you.
Terry
At 07:06 AM 8/2/2008 -0700, Grant Corriveau wrote:
| Quote: | Regarding the taildragger version, someone wrote:
the rudder peddles don't have the loading of
the nose wheel so it takes very little pressure on the peddles to deflect the
rudder.
I've often wondered how the nose-dragger model would handle if the rudder pedal links to the nose wheel were removed, or if the push-pull rods were replaced with springs (ala C-150) ...
The current setup does make for a relatively heavy rudder pedal feel.
Anyone tried this before? |
Terry Phillips ZBAGer
ttp44~at~rkymtn.net
Corvallis MT
601XL/Jab 3300 s .. l .. o .. o .. w build kit - Tail, flaps, & ailerons are done; working on the wings
http://www.mykitlog.com/N47TP/ [quote][b]
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_________________
Terry Phillips
Corvallis, MT
ttp44<at>rkymtn.net
Zenith 601XL/Jab 3300 slow build kit - Tail feathers done; working on the wings. |
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klaus(at)utdallas.edu
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| Posted: Sun Aug 03, 2008 5:00 am Post subject: Rudder pedals |
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Hi Grant,
The heavy feel of the rudder pedals on the tricycle gear
version of the 601 can solved with a thrust bearing installed
on the nose gear. The bearing takes up the load produced
by the bungee and allows the rudder to move freely. For
details, go to
http://utdallas.edu/~klaus/Airplane/nose_gear_thrust_bearing.html
Replacing the pushrods by springs may not be advisable since
the nosegear has little caster and thus likes to swivel when
the tire hits imperfections on the runway. As it is, directional
control on takeoff is difficult enough, at least for my plane.
Happy flying,
Klaus
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Sun Aug 03, 2008 3:42 pm Post subject: Re: Rudder pedals |
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Klaus,
I am having difficulty visualizing the bearing setup you have described. I am interested, do you have more details?
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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/ |
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klaus(at)utdallas.edu
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| Posted: Mon Aug 04, 2008 9:09 am Post subject: Rudder pedals |
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Hi Ron,
It is actually quite simple. You drill a 1/4 inch hole in the nose gear
tube, from front
to back, and insert an AN4 bolt with the following arrangement from
front to back:
head of bolt, washer, 1/4 inch sleeve bearing (Aircraft Spruce), washer,
nose gear tube,
washer, 1/4 inch sleeve bearing, washer, nylon stop nut.
The hole is in such a position that ,with the bearings installed, the
bearings rest evenly
front and back on the bearing bracket. You may have to add a shim in the
back
to achieve this. When installed without bungee chord, the
bearings will hold up the nose gear as a stop and the gear will freely
swivel.
When the bungee is installed, this will still be the case due to the
bearings
picking up the thrust by the bungee.
Important: 1. When the AN4 bolt is finally installed, use a bit of
sealer between the nose gear tube
and the two washers immediately next to the tube, so that moisture
cannot enter
the tube.
2. Make sure you do not torque the AN4 bolt too much so that the nose
gear tube
becomes out-of-round. The torque should be just that the entire arrangement
becomes snug against the tube.
I have seen several ways nose gears have been installed. Typically, the
two stubs
to which the rods are attached, slide on some sort of surface, be it
nylon or delrin or
(in old HD/HDS design) aluminum brackets. No such sliding surface is
needed anymore, since the bearings hold up the gear.
We have used this arrangement for more than 12 years, without any glitch
or problem.
--
Klaus Truemper
Professor Emeritus of Computer Science
University of Texas at Dallas
Erik Jonsson School of Engineering and
Computer Science EC31
P.O. Box 830688
Richardson, TX 75083-0688
(972) 883-2712
klaus(at)utdallas.edu
www.utdallas.edu/~klaus
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grant.corriveau(at)TELUS.
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| Posted: Tue Aug 05, 2008 9:40 am Post subject: Rudder pedals |
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Thanks Klaus,
But I also don't yet see how this works, and why it relieves the
rudder drag...
Thanks for any clarification
Grant
HDS GHTF
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