ORIGINAL: Deadeye
The Futaba 7C does NOT have mixing for dual elevator servos. You can program it, but the trim will only work on the master half, so that function is useless. I have a friends 7 channel Hitec, but have not come across any provisions for dual elvator servos in that manual either (yet).
Get yourself a 9Cap Futaba if you want to go with Futaba. I love mine, and it's very easy to set up once you learn the programming 'language'.
I set up flaperons and ailevators on a 3D plane for a friend with the 7C. It took several hours of tinkering. I had to use the flaperon function as well as all 3 P-mixes to get it right.
By slaving Ch. 7 to elevator, I had tailerons. The Ch. 7 reverse setting and sub trim took care of trimming the slave half. The only problem was servo speeds. The right elevator servo moved slightly faster than the left. Luckily, I had enough spare servos and was able to match a pair.
Even the Hitec Optic 6 has dual elevator capabilities.
I too love my 9CHP. It is easy to do basic airplane programming. But, when you get into really complex mixes, it can get overwhelming.
My problem with Futaba is their manuals. NOT their radios. I don't think you can buy a more versatile radio than the 9C for the money.
When I was trying to set up flaperons on a 3 position switch so that they operate in unison with the elevator in one position, off in another position and travel opposite the elevator in the last position, and keep the ailerons functioning, I nearly went crazy! I knew the radio could do it. But, NO ONE could tell me how to do it and the manual was useless.
I figured it out. It took weeks of experimenting! Anyone out there care to guess how to program that?
Doug