Acceleration comparisons

[horseback]

Originally Posted by pandacat

But doesn't everybody else have CSP, too? Spit, 109, 190? Or P51's CSP is somewhat special? For spit and 109, it seems from the charts that 3000rpm always accelerates faster than 2700rpm

Mustang's throttle is supposed to control manifold pressure directly, rather than just the amount of fuel going to the engine,as in other types. During the 10k tests, I ran the Spit IX LF at 2700 and 3000 rpm to see if there was a difference, and 3000 rpm was always superior at all speeds.

The Mustang is a bit different. If you look at the 10k charts, there is a point at which the Mustang at 2700 rpm will accelerate more quickly than at 3000rpm, and it reaches top speed much sooner after the three or so earlier 10 kph intervals. In the thicker air at 100 meters, this doesn't seem to happen, or at least it isn't as obvious.

Currently building my 5k database, which will probably show a transitional difference somewhat less than the 10k tests for the Mustang at 2700 vs 3000rpm; it will probably be more pronounced at 15k and 25k.

cheers

horseback