Originally Posted by Nos4r2
How are you supposed to know-there's no data available. If there was, they'd already have it.
you can work out the maximum speed the engine is capable of though:
Max speed = max_rpm x 60 x prop_pitch (inches) / gearbox_ratio x 72913
You will never go faster than that with that engine / prop combo. (And probably only 90% of it).
Originally Posted by whisper
Go for 18-20 then, might mean a cheaper quote
Never a good idea to mislead insurers on 'potential risk' though - it gives them an excuse later.