xp8103 mixing for three throttles
Hello Danny:
I have built a rediculous airplane that requires the use of three throttle servos. I am having trouble getting the mixes right. Here is what I think I need to have happen:
1. mix throttle and spoiler for the right engine
2. mix spoiler and spoiler to cancel out the spoiler switch
3. Mix throttle and gear for the left engine
4. mix gear and gear to cancel out the gear switch
Every time I try, I end up with end points that are not correct and limited movement of the mixed throttles. Here is how I am doing it:
1. Set the throttle travel: H=0, L=148 (odd but it works)
2. set spoiler endpoints for correct travel: +71% on top,-69% on bottom
* at this point all is well. The center engine has correct travel, the right engine has correct endpoints with spoiler switch (not using pot)
3. Mix throttle to spoiler ? (currently +125, +67)
4. Mix spoler to spoiler ?(currently -100, -100)
If I set up spoiler to spoiler prior to throttle to spoiler, I can make the spoiler switch inert by trial and error so that the throttle lever on the engine is halfway between full and idle. Then when I mix the throttle, I can get it to go to idle but it won't pass the halfway point on the way to full.
Help me please! I have t ried every combination I can think of except the one that works.
Jeff