Hi Oldtime,

Great to see another twin/multi flyer on RCU!

I am flying my twins/multis using a Futaba FF9 for two years by now. Unfortunately I don't have the manuals by hand now, but so far always use as few mixers as possible (In general: on Twins/Multis stay as simple with your electronics/onboard systems as possible!!!!)! The reason is the following: in flight in case of an engine failure you first dont get which one died - it's pure horror. So I have all my throttle servos on Y/double Y wires, going over 1 single channel. The problem is to do all the servo arms and push rods in the same length, but in case of an engine out you can stop /reduce to idle all the engines by moving one single stick or switch. According to my experience, you do not need the possibility to move your servos differently (given that you use the same servos/push rod size on all the engines).

Only on one plane I use a simple linear mixer, also with exactly the same servo arm/push rod lengths. I that case I don't know if there are any differences because the engines have a difference of 7500 on one side to 9000 on the other one (40 year old OS FS 60) - but it is no problem when flying!

For some more helpful info about how to get a long lasting twin/multi see also the following thread, especially have a close look to post N° 20: http://www.rcuniverse.com/forum/m_45..._1/key_/tm.htm

As soon as my exams are over I can have a close look to the manual and the FF9 and give you some further help on programming that radio!

regards
Chris