ORIGINAL: Falcon32
I want to use the Tx mix to do it, could someone give me a good starting point on the % throws.
Also do I just flick the Tx switch or hold the switch till the plane has completed the roll?
As mentioned above, 100% is a good place to start. If you just flick the Tx switch, you will get part of a snap roll. I put this mix in for my foamy just cause I didn't need the switch to start the timer. I found that with the mix I could do a four point snap roll by pulsing the switch.( I thought it was funny.) So to answer your question, you would have to hold the switch for as long as you wanted to continue to snap. You might have to let off the switch a little early to stop the snap level.
If you're !QUOT!not so aerobatic plane!QUOT! still doesn't snap very well or fast. You might look into aileron differential. There is a good article on it in this months AMA magazine.
Later,
Dave