Hi,
I am using a Roto 35 gasoline engine on the cap.
I checked the CG and notice that I have to install the rudder servo's in the back of the fuselage.
But I am afraid that it is very difficult to fine tune the working of both servo's. What is there is a sligth difference in response time ?
Salto,
I't fairly easy to install both rudder servos in the tail. I match my servos mechanically. I use analog servos (HS645's) and adjust the control rods lenght for zero servo hum (no feedback current). You may not eliminate all the hum all of the time but one can get very close. Another way is to use a current meter and adjust the rods for the lowest current. All you need is a servo extension modified to measure the positive wire in series with the DVM.
The easiest way is by using JR Matchboxes, or SmartFly Sevo Equailizer, but that's going to set you back a few bucks. Now, if you use digital servos you can use the Hitec digital servo programmer and servo tester, you can test any brand of transmitter for the pulse sent to the receiver and any servo for voltage and proper movement. Additionally it will allow you to program the functions for Hitec brand digital servos. If you use digital servos, you need this unit to maximize your investment.