Quote:
Originally Posted by shdw  Pretty basic, I am sure many of you won't believe it. Please don't argue until you have spent at least an hour testing it. The 1 inch = 100 rpm you will find is true in mostly any piston you fly, the performance yielded for 1 unit = 100 fpm may vary especially with larger more powerful aircraft. |
I was curious so I did a little Googling:
The first
chart I looked at was for a IO-360. It shows 55% and 65% power settings at 2100 and 2400 RPMs. The MP change varied from 2.3" to 3.0" for a 300 RPM change. This equates to 0.77" to 1.0" per 100 RPM.
The second
chart is for an O-320. This one shows 2450, 2500, and 2550 RPM. Searching through the chart it appears that 100 RPM changes in this engine (2450 - 2550) require 0.5" or less change in MP to hold the same horsepower.
I'm not yet convinced of your contention that 1" = 100 RPM. Do you have more charts available that support your thesis?