RE: tower .46 and speed
Hi!
11x6 prop on a Sonic 500 and .46 engine..?!!
Must be kidding!
9x6, 9x7 or 9x8 APC is what you should use.
Here is mine powered by a MVVS 6,5cc engine running a 10x6 Graupner cam-prop and 80/20 fuel (that's what the rules in Q-500 say over here). Speed with this set up is around 170-180km/h (110mph).
Regards!
Jan K
Sweden