planesmith(at)hotmail.com
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 Posted: Sat Feb 23, 2008 8:19 am Post subject: Request of those flying (was Rudder Trim - Spring Bias) |
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Been thinking a lot about Jason's rudder trim system and have a request for those flying.
Jason said "If I deflect the one springs free arm 30 degrees, will it create enough force to put the airplane in trim. The springs apply about an 8 pound force to the rudder cables (pre-load if you will), assuming they will want to maintain in equilibrium a 30 degree deflection should be more than enough to trim the airplane."
Would someone flying, been willing to measure the force it takes to deflect the rudder under flight loads? The measurement wouldn't need to be exact, just close. Just have a passanger with a fish scale hooked to the bottom of the rudder pedal as you push on the matching pedal may work. I'm sure there are other ways to do this- Hey this is one ingenious bunch! Having this force measurement will aid greatly in the design and initial success of this trim system.
Is someone up to doing this? I know this is asking a lot. One you've got to go flying and two you have to find someone to ride along with you:) But joking aside I think this would speed the development along and I for one would be very appetitive.
Thanks for any help,
Vern Smith (#324 motor mount ready to install)
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| Quote: | To: rv10-list(at)matronics.com
Subject: Rudder Trim - Spring Bias
From: jason.kreidler(at)regalbeloit.com
Date: Fri, 22 Feb 2008 11:55:17 -0600
I have 'developed' a spring bias rudder trim system for the RV-10. After sharing this idea with Deems he encouraged me to do the same with the rest of the group. So here goes, but before I get into any details let me preface this whole conversation with a few thoughts. This is all in theory, I have absolutely no actual flight testing to back up any of the 'claims', or assumptions. Just good old common sense and a tiny bit of engineering. Our airplane is not in the air yet, I had hoped to get in the air, prove out the system, then share with the world. To prevent anyone else for possibly needlessly cutting into their rudder to add a trim tab, I have decided to bear the scrutiny of an unproven, theoretical system. Please be gentle...
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