HOW FAST IS THE HANGER NINE MUSTANG WITH A SAITO 91 AT FULL THROTTLE MINUS ABOUT 300 TO 500 HUNDRED RPM'S[60-SIZE]..?

What prop? how's it ballanced? What pilot is behind the sticks? Wheels up or down?

It'll break 120 in level flight set up correctly or speed runs. Take-off will be a beast with the speed prop.

Not as fast as one with a YS 91 or YS 110 spinning a 14x10 prop on 30% nitro fuel.

if the hanger9 p-51 will do 120mph with a 90,then my hanger 9 corsair should do this easy with a siato 130FT.honestly I did'nt know how fast it would go,and I know they are two different planes,but if I get that from my corsair,I'm a happy camper.I hope you want fast SIR CRASH-A-LOT,cause if your serious about your user name,this plane will get you there in a hurry at that speed!(kidding)

Why do you want it to go so fast?!

why not?"to each his own",right?

They are turning a warbird into a pylon racer.

BTW, multi-cylinder engines will not be as fast as single-cylinder engines.

Then why not go with a Reno racer kit in teh first place!! [X(]