BSFC Numbers for Rotary

[RETed]

Hey man, don't sweat it...

We both know that "numbers" can come in laymans or expert terms.
A BSFC graph plot is the ideal.
I was just puzzled when you said a BSFC "number" was best peak.
Most piston engines average around 0.50, as a consensus.
Some of those Honda VTEC's can hit in the 0.4x range under best conditions, I think.

As another example...
If you know some sound engineering stuffs, drivers / speakers can be given frequency range numbers - i.e. "30hz - 20kHz"
Anyone who is seriously into this stuff knows that those numbers are useless - at the very least, you need a deviation % spec for it to be useful - i.e. "30Hz - 20kHz, 0.1%"
Take it one step further, and you'd insist on an actual graph plot of the frequency curve!


-Ted