What is the absolute max take-off rpm on a turbo 13b that you still consider
safe enough?
Considering a 1 to 2 minute take-off power.

Thanks, Mike Arndt

8500 RPM on an RX8 motor and 7500 RPM on all the rest.

The rotary  is not at all like a piston engine. There are no pistons
trying to jerk off the end of the connecting rod. Jerk happens
to be a technical term meaning the rate of change of acceleration.
In a piston engine when you are in the dyno room with it running full chat
you kind of have the feeling you are about to receive shrapnel
wounds at any second. The tendency is to flee.

You can stand along side a rotary under the same circumstance and
feel entirely comfortable. Kind of like a large electric motor.

However having said all that nobody to my knowledge has ever taken
off at over 7500 RPM. Well maybe Ken Welter with his 3:1 belt reduction
and nitrous oxide injection.

Paul Lamar ...No rotor no motor.

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