RE: OS 75 - anyone play with one yet?
I may have read the magazine article wrong along the way.... thought I saw some other rpm figures. My aging eyes.
The OS specs on the engine are a good example of why that data has to be taken with a grain of salt.
They noted 2.4 HP at 15,000 rpm, practicle range up to 16K rpm.
Then recommend "9,000" rpm props. ???
Just does not make sense at all.
Have to wonder, why "rev-limit" the engine [sm=confused.gif]
Threads elsewhere on RCU seem to indicate it is a good running engine.... does run with the big props well. That is good to see.
My thought was more along the lines.... if it is hitting peak HP at 15,000 ..... what prop does it take to get to 13,500 or 14,000 rpm so it can approach that peak? No doubt the tuned muffler would help too.