RCU Forums - View Single Post - Very weird behavior of Extra upon elevator input

08-30-2008 | 08:01 PM

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bbbair

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From: Sarnia, ON, CANADA

RE: Very weird behavior of Extra upon elevator input

I cannot say for sure until you give me some more information about YOUR Extra.

BUT!

I have an Extra 300 that was a kit made in the ealy 1990s (another story) if our two AC have the same Elevator hook up I MAY be able to help you... (bear with me)

I have a single servo that uses a pushrod to a 'Y' arrangement to the TWO elevators.
- the servo is located on the right side of the fuse
- because of the location of the servo, the LEFT Elevator push rod is LONGER than the RIGHT pushrod.
- the servo action is circular and it only moves the elevators in a linear fashion for about 30 degrees (+/- 15) which is gentle flight.

When I EXCEED the linear motion of the servo the pushrod moves the left and right elevators at a different rate - and I get what appears to be some SLOPPY manouvers. [:'(]

MY Solution to this is to add a second servo and pushrod for the Left elevator and slave them together.

So what sort of Elevator arrangement do YOU have?

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