REFLECTOR:Re: Aileron Rigging Frustration
KeithHallsten
reflector@tvbf.org
Sat, 3 Apr 2004 07:48:27 -0800
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Kurt - See embedded comments, below. I'm particularly interested in =
this issue, because I'm just about to rig my ailerons!
Keith Hallsten
----- Original Message -----=20
From: NMFlyer1@aol.com=20
To: reflector@tvbf.org=20
Cc: brendanO@velocityaircraft.com=20
Sent: Saturday, April 03, 2004 7:11 AM
Subject: REFLECTOR:Re: Aileron Rigging Frustration
<SNIP>
Possible changes: In order to achieve more aileron travel, I have =
thought of 3 possibilities:
1, Increase the length (lever arm) of the keel bellcrank by about =
3/8" (would get more travel and more leverage) [KH - No, more output =
travel will always mean LESS leverage, unless you get more travel of the =
ailerons by using more travel at the control stick. Actually, if your =
limitation really is the travel available in the push-pull cables, =
anything you do "upstream" of the cables will not affect the aileron =
travel.]
2, Decrease the lever arm of the wing root bell cranks by about 3/8" =
would get more travel at the aileron torque tube, but less leverage and =
therefore stiffer ailerons). This could be done by welding the hole shut =
and drilling a new one as hole edge distances could not be maintained by =
simply drilling a new hole. [KH - This would work, with slightly less =
leverage as you note.]
3, Get cables that have more travel than the 3" the factory =
provides. [KH - This would be the best solution, if the cable travel is =
really the limiting factor. If you go this route, be sure that you get =
cables with heat-resistant liners. A few years ago there was an =
incident of heat from the engine partly melting the cable liners and =
then locking the ailerons in flight. I believe that shortly thereafter =
the factory changed the specification on the push-pull cables they were =
providing. About 40 or 50 of us went in on a group buy of replacement =
cables with greater heat resistance from a supplier in Great Britain. =
The recommendation to use firesleeve over the portion of the cables in =
the engine compartment also came about at that time.]=20
So, there is the next chapter in frustration. I will let you know the =
next chapter soon. Basically I am no more nuts than I was before, and =
the limitation is in the system.. not the builder. Whew!!=20
Kurt Winker
173 FGE ... flippin flipper fiddelin'
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<DIV><FONT face=3D"Californian FB" color=3D#0000ff size=3D3>Kurt - See =
embedded=20
comments, below. I'm particularly interested in this issue, =
because I'm=20
just about to rig my ailerons!</FONT></DIV>
<DIV><FONT face=3D"Californian FB" color=3D#0000ff size=3D3>Keith=20
Hallsten</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3DNMFlyer1@aol.com =
href=3D"mailto:NMFlyer1@aol.com">NMFlyer1@aol.com</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A=20
title=3DbrendanO@velocityaircraft.com=20
=
href=3D"mailto:brendanO@velocityaircraft.com">brendanO@velocityaircraft.c=
om</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, April 03, 2004 =
7:11=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:Re: Aileron =
Rigging=20
Frustration</DIV>
<DIV><BR></DIV>
<DIV><SNIP></DIV>
<DIV>Possible changes: In order to achieve more aileron travel, =
I have=20
thought of 3 possibilities:</DIV>
<DIV> </DIV>
<DIV>1, Increase the length (lever arm) of the keel =
bellcrank by=20
about 3/8" (would get more travel and more leverage) <FONT =
face=3D"Californian FB"><FONT color=3D#0000ff size=3D3>[KH - No, more =
output travel=20
will always mean LESS leverage, unless you get more travel of the =
ailerons by=20
using more travel at the control stick. Actually, if your =
limitation=20
really is the travel available in the push-pull cables, anything you =
do=20
"upstream" of the cables will not affect the aileron=20
travel.]</FONT></FONT></DIV>
<DIV>2, Decrease the lever arm of the wing root bell =
cranks by=20
about 3/8" would get more travel at the aileron torque tube, but less =
leverage=20
and therefore stiffer ailerons). This could be done by welding the =
hole shut=20
and drilling a new one as hole edge distances could not be =
maintained by=20
simply drilling a new hole. <FONT face=3D"Californian FB"><FONT=20
color=3D#0000ff size=3D3>[KH - This would work, with slightly less =
leverage as you=20
note.]</FONT></FONT></DIV>
<DIV>3, Get cables that have more travel than the 3" =
the=20
factory provides. <FONT face=3D"Californian FB"><FONT =
color=3D#0000ff=20
size=3D3>[KH - This would be the best solution, if the cable travel is =
really=20
the limiting factor. If you go this route, be sure that you get =
cables=20
with heat-resistant liners. A few years ago there was an =
incident of=20
heat from the engine partly melting the cable liners and then locking =
the=20
ailerons in flight. I believe that shortly thereafter the =
factory=20
changed the specification on the push-pull cables they were =
providing. =20
About 40 or 50 of us went in on a group buy of replacement cables with =
greater=20
heat resistance from a supplier in Great Britain. The =
recommendation to=20
use firesleeve over the portion of the cables in the engine =
compartment also=20
came about at that time.] </FONT></FONT></DIV>
<DIV> </DIV>
<DIV>So, there is the next chapter in frustration. I will let you know =
the=20
next chapter soon. Basically I am no more nuts than I was before, and =
the=20
limitation is in the system.. not the builder. Whew!! </DIV>
<DIV> </DIV>
<DIV>Kurt Winker</DIV>
<DIV>173 FGE ... flippin flipper fiddelin'</DIV>
<DIV> </DIV>
<DIV> </DIV></BLOCKQUOTE></BODY></HTML>
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