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1. 05:45 AM - Elevator Trim Control Horn (MP)
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| Subject: | Elevator Trim Control Horn |
Gents
I'm building Lightning # 143 and struggle with a little thing.
Could somebody tell me what the elevator trim deflection should be?
>From the manual it should be 30deg down but how much is it up?
The trim servo has a travel of 17mm with my trim tap cut to the manual
measurements it is not possible to a have a control horn similar to the one
in the manual and deflection +- of 30deg.
As by my calculation, if the pushrod attach point would be on the bottom
skin of the trim tap the travel of the servo is still not enough for +-
30deg. My Trim tap is at the trailing edge 15mm thick => requires 10mm
travel for 30deg if attached on the bottom skin.
So what is the solution? The next servo up with 26mm travel would work? Or
is only a down travel required? I guess also a very short control horn is
not very stable as the angel of control is very low (I would have on my RC
model plane bigger horns then on the full size) if this makes sense?
Any ideas very appreciated thanks
Michael
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