by KEW » Tue Jan 10, 2012 4:00 pm
Mixing is a function that is performed by your transmitter - if it is programmable. It allows you to combine the effect of two different channels to a degree that you can set up.
In a delta or flying wing plane for example, you can combine the aileron and elevator channels so that the elevator stick moves both of the elevons up and down together while the aileron stick makes one go up and the other down at the same time like ailerons.
In a helicopter, especially if you don't have a tail rotor gyro, it helps to mix a little of the throttle in with the tail rotor so that as you increase throttle, you dont have to correct for yaw.
I hope this give you a little bit of understanding of what mixing is about.
Back in the seventies I built a flying wing with elevons as the only moving surfaces. There was no mixing on the simple transmitters then. I made a mechanical mixer for the elevator and aileron servos by moving the aileron servo backwards and forwards with the elevator servo. It worked but it was mechanically a bit clumsy, and it changed the C of G a little bit when the servo moved. I finally designed an electronic mixer that connected between the receiver and the two servos - one controlling each surface. I still have that plane in the attic with about 40 others, large and small and all in flying condition.
Regards,
KEW