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0. 09:39 AM - Coming Soon - The List of Contributors - Please Make A Contribution Today! (Matt Dralle)
1. 01:30 PM - Re: Rigging Rudder (taildrags)
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| Subject: | Coming Soon - The List of Contributors - Please Make A |
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| Subject: | Re: Rigging Rudder |
Jack;
My airplane has two sets of cables leading back from each end of the rudder bar.
One set goes to the rudder and one set goes to the tailwheel, and both sets
have turnbuckles at the aft ends, which makes them very easy to get to. However,
once they are tensioned there should not be any need to get to them very
often so there is something to be said for putting them at the rudder bar where
they are essentially on the CG and not way out at the tail where the effect
of weight is most evident.
As you know, some builders just run one cable aft from the rudder bar and either
attach short tailwheel steering cables onto the rudder cables "bridle-style",
or they steer the tailwheel using horns at the bottom of the rudder, JN-1 style,
like Ernie Moreno's:
http://www.flysquirrel.net/piets/tailwh01.jpg . I think the JN-1 arrangement puts extra load on the bottom of the rudder when this is done, and it should be beefed up. I don't have my Grega plans handy but I'm pretty sure the Grega has extra beef in that area.
As to the cable tension, my rudder and tailwheel cables are just snugged to take
out the slack and then maybe take an extra half-turn of the turnbuckle. For
one thing, my cables run through fairleads going aft, so they don't slap around
if they're not twangy-tight. For another thing, there really isn't a lot of
friction in the rudder control system and you're operating it with some of the
largest muscles and "levers" in your body, so nothing is gained by tightening
the cables real tight. By all means, make sure they're tight enough to keep
flutter at bay though.
Like Ernie's, my tailwheel connection chains have springs on them where they connect
to the steering horns at the tailwheel, so those cables are self-tensioning
to some extent, so no point in tightening the cables past the point where
the springs start to act.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=449957#449957
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