ORIGINAL: Funtana140
Hello all! I am going to use a pull pull set up on a CA model Epsilon 90 that I am building. It was between this setup and an mk Bellcrank setup but I think I can get more throw using this setup. Does anyone have any pointers? I think the best way to do it would be to put the servo on its side and then run 4 equal lenghts of pull pull cable, but judging by the room in the fuz, that might be hard to do. Does anyone know if it will work with the servo upright and some of the wires crossing?
I appreciate any input anyone has.
Thanks for looking!
I did this on a Hydeout (as yet unflown). I layed the servo on it's side. If you don't do this you will get slight variaton in throw between the elevator halves. Look at the figure in [http://www.rcuniverse.com/forum/m_5622168/anchors_5636267/mpage_1/key_/anchor/tm.htm#5636267"] to see why. This will give you a little roll coupling with elevator input.
I used two servo mounting platforms, one for elevator, the other for rudder. The elevator plate is mouted with screws so I can access the rudder servo.
What I would suggest, if you have not built the fuse yet, is to take the plans, draw the servo on them and use a straight edge to draw the path of the cable from the servo to the control horn. Use this information to trim any bulkheads and formers that get in the way. Do this on the side view also so that you can cut the cable exits in the fuse sides before to start gluing stugg up. This is a lot easier than trying to do it once the fuse is built.
Quique used pull-pull on both the elevators and the rudder and both servos are mounted in the upright position.
This will work if you use two servos, but with one, it has to go on it's side.