I figure it is 14,000 rpm with my method (A# on the synthesizer) 40 mph on a clean plane. Not really that bad, but a Thunder Tiger .10 does that with a 7-4, and an OS LA .10 does 16,200 with a 7-4 which is a bigger load. Really a Jumping Bean would be ok on longer lines like maybe 45 to 50 feet but would be nose heavy.