RE: Reaper Elevon Servo Installation
Let me agree with B58. To get your balance right, you will have to put some battery in the front let alone the servos. This model has a very efficient wing and will carry camera's, video recorders, GPS flight recorders, with virtually no trim change. If you are flying MW54 or more weight is not a problem.
I have used the carbon fibre rod system without problem or hassle for nearly two years (more than 200 flights).
The problem with this model is getting it down, particularly if you have a powerful engine with a high residual thrust Using a Jetcat P-80 and a conventional canard mode of control the model would only land on dead stick. It actually climbed on idle!
To get around this, keep your canards live but in slave mode. Set them in the same mode as the Eurosport ie with a 3 position switch on the tranny in 3 different trims.
1- for quick take off (positive angle of attack)
2- elevon only (neutral canard) to give gentle flying
3- for advanced aerobatics and safe landings free of bounce (negative angle of attack)
I had very poor control with 3Kg/cm elevon servos. A switch to Hitec digital mini (5.5Kg on 6volts) cured the problem. Full elevon movement (ie both controls) goes to about 45degrees.