I flew my TF GS B model today using both the Varioprop 4 blade set at 20 inches pitch and the Zinger 22-16 4 blade. The varioprop briefly reached 6100rpm on a down wind pass at 100 feet that looked pretty fast. The prop chart estimates that at 6140rpm it may have reached 125 mph. The Rimfire 65cc motor is still over speeding the VP. The Zinger 4 blade generally peaked between 5000 and 5400rpm with chart speeds at 85-90 mph. Current draw was high at 145amps and ESC temp briefly got to 178f but generally ran at 145F. It was a hot day at close to 90f and no clouds.