[PUP] :PPM-propeller efficiency

[Patrick Gerety]

>but does that give us maximum efficiency (fuel  
>per mile) at S/L 1.2 or
lower?

Theoretically yes.  I get right at 5nmpg at a 1.2 S/L (no genset
operating or stabilizers of any kind) with my John Deere 4 cyl. turbo diesel. 
If I slow down, I can do better.  If I speed up, efficiency drops off
dramatically.

>I have seen data that shows the latest diesel gensets have
nearly the  
>same fuel efficiency at 50% power as they do at 100% (although 
>efficiency falls off fast below 50%).

Apples and oranges.

Patrick
Willard
40PH
ALOHA
La Paz, MX