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LNC4 Performance
On this ListServ in the past, we discussed LOP horsepower in the
TSIO550E and determined the conversion factor was 13.7 x LOP fuel burn
(gph) equals HP generated. Your 17.5 gph model calculates to 240
HP, which is 68.6% (not 75%) power (based on this conversion factor).
Disclaimer: I did not stay at a Holiday Inn last night.
Here are my numbers I use for flight planning, as built into my
online Flight Plan profile http://www.fltplan.com/ which anyone
can import using my tail number N334P. This is based on 19 gph
(34") LOP operation (calculates to just about 75% power), and
assumes that I am LOP within the first minute after takeoff, climbing
LOP (unlike some pilots).
I've always think I'm a wee bit slower than other LIVPs.
I suppose this is average ~3100 lbs GW across the typical flight
duration.
Hope this helps.
Jeff L
LIVP (340 hrs)
I am trying to
create a math model for the IVP. The model uses the following critical
parameters:
75% power =
262.5BHP, zero lift drag coefficient = .02, propeller
efficiency range = .87-.80, and gross weight = 2900
lbs.
The model predicts
the
following
Fuel flow @ 75%
power = 17.5 GPH and 75% power speed vs ISA
altitude:
ALTITUDE FT TAS KTS
0 218.5
2500 223
5000 227.5
7500 233
10000 238
12500 242
15000 247
17500 252
20000 257
22500
262
Is this
consistent with experience? Iąd be interested in any other data such
as ROC and speed at these or other weights and power
settings.
Thanks,
Carl
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