My exact questions seem not answered in threads on similar topics or in the computer radio manual (Futaba 9CAP).
Assume the elevator's mechanical linkages throw 1.5" each way, and that 1" is desired. The clevis is at the absolute top of the elevator control horn (away from the elevator surface), and on the servo arm the rod linkage is three holes out from the servo spindle (so throw could be reduced by moving the rod linkage in two holes closer to the spindle).

1. APPROACH A: I could use the computer radio's end point adjustment to reduce throw to 1" -- assume the EPA adjustment needs to be set at 66% to do this. APPROACH B: But I could alternatively leave the EPA set at 100% and instead reduce the throw to 1" by reducing the high rate setting on the dual rates menu from 100% to, say, 66%. QUESTION: Is there any difference at all between these Approach A and Approach B?

2. If I move the servo arm linkage in as far as possible, to the arm's innermost hole (next to the servo spindle), I can get closer to the desired 1" setting. Should I do this before attempting any computer EPA/dual rates adjustments? (Putting the linkage right next to the spindle seems like it would give very little power to the control surface.)

3. Is the EPA set as a % of the regularly available servo arm movement?

4. If I use dual rates to set a high rate of 80% -- does that mean it's 80% of the EPA setting?

5. Is the regularly available servo arm movement about 40 degrees each way, that is, describing an arc of 80 degrees?


Thank you for any help you can give.