Posted for "George Braly" <gwbraly@gami.com>:
 
 I have the motored friction Hp curve  for the 540 class engines.
 
 But you don't need to really go there.
 
 The LOP BSFC numbers are very accurate at higher power settings.
 
 If your digital fuel flow is accurate down to about 1%,  you can get the HP
down to a very close number - - so close that lots of other things will cause
bigger errors,  like prop efficiency, induction losses, etc.
 
 And using the LOP fuel flow method is particularly accurate for small deltas
in power settings.
 
 That is probably as good as you can do without a torque meter.
 
 Regards,  George
 

 <<
In a message dated 12/21/2004 10:30:38 P.M. Central Standard Time,
 glcasey@adelphia.net writes:
 1.  Using the MAP as-is the airspeed should have changed 1.7%
 2.  Using MAP - 4 inches the airspeed should have changed 2.2%
 3.  Using fuel flow directly the airspeed should have change 1.9%