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Re: Elevator Trim systems Elevator Trim systems

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ruebd(at)skymail.csus.edu
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Posted: Fri Jan 06, 2006 1:51 pm Post subject: Re: Elevator Trim systems Elevator Trim systems

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ruebd(at)skymail.csus.edu
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Posted: Fri Jan 06, 2006 1:56 pm Post subject: Re: Elevator Trim systems Elevator Trim systems

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smokey_bear_40220(at)yaho
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Posted: Sat Jan 07, 2006 6:55 am Post subject: Re: Elevator Trim systems Elevator Trim systems



Hi Duane,

I believe that there were 2 and maybe 3 failures of

the old jack screw. I have pictures at home of one

plane before and after it broke. It was a beautiful

plane that got bent sideways plus other damage when

the jack screw broke loose just before landing and it

hit hard. The jack screw broke at the bottom mount.

This was the old jack screw where the motor was

parallel to the jack screw. The newer and stronger

ones have the motor at 90 degrees. I still added a

backup safety mount on the bottom of mine and so did

some others.

The wound spring trim indicator that came with mine

was terriblly inaccurate. It would not show any

movement for the first 25% of travel in either

direction. I bought a rheostat and linear meter from

radio Shack and made a system where the stab rotates

the rheostat and the meter reads its position in the

cockpit. Works fine for me. Some people just use a

takeoff reference line on the tail and a mirror in the

cockpit to line it up. Pretty easy and fool proof.

Mine does not trim below about 60 knots unless I carry

baggage. John McBs flap/trim fix may be in the works

for me after I tweek a few other things.

I might have to add the correction for the sensitivity

in cruise too. So far I have been beeping in trim and

immediately beeping in reverse to get a fine

adjustment. It may take several up/down tries to get

it set right.

Overall I like the electric trim fine on my S-5. It

just needs a little tweeking to make it work perfectly

and to keep it operating safely.

Kurt S. S-5/NSI turbo

--- "Rueb, Duane" <ruebd(at)skymail.csus.edu> wrote:

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		   Subject: Kitfox-List: Re: Elevator Trim systems

Elevator Trim systems

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