Ken Powell wrote:
This is a rather fun guessing game. If we lose 3% power for
every 1000 ft (I'm not sure about this, I don't have my books
in front of me), then Tracy was producing 58% of max power
(14,000 ft = 14 x 3 = 42% -100% = 58%). I remember from a
previous discussion the Tracy is estimated to be making a max
of 180 HP to 185 HP, so 185 * .58 = 107.3 HP. This means that
Tracy would have been leaned out to a BSFC of about .47, which
also matches previous calcs. Please don't flame me to badly
guys, just correct the math if I missed something. Remember,
this is for fun!
Ken Powell
Sounds right to me Ken and Tracy has made the same calc's in the past
with the same conclusion. I don't allow flames :-)
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org