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I pickup about 8 kts when running ROP. I pickup about 3 kts per thousand feet increase in altitude. The "air" can change the TAS 10-15 kts pretty easy, so getting good test data is difficult. I ran some tests back to back ROP and then LOP at a variety of altitudes. 8 kts is a decent rule of thumb.
Craig Sent from my iPad
On Apr 3, 2013, at 8:24 AM, "Colyn Case" <colyncase@earthlink.net> wrote:
Craig,
just noodling about my de-ice again. trying to figure out how slow I'm going to be.
I only have ROP numbers on my plane at fl250. Trying to convert those into LOP speed.
Do you have ROP numbers for your plane up there? In other words do you know your ROP to LOP speed penalty?
Colyn
On Jul 24, 2012, at 7:57 AM, Craig Berland wrote:
Flight to OSH from Sedona, AZ...actually to Yankton, ND for lunch and fuel.
Sunday
ISA +35
FL 250
MP 31.9
RPM 2500
FF 17.1 gph
TAS 277 (Chelton)
Craig Berland
N7VG
Sent from my iPad
On Jul 23, 2012, at 7:31 AM, "jeffrey liegner" <liegner@ptd.net> wrote:
Power and Flight parameters from today's flight test.
Level FL240 west bound: 15*F (IAS+41F)
MAP 31.5 RPM 2400
Fuel 17.1 gph (LOP) FP 30
TAS 257
LIAS 174
High CHT 394 (#2, of course)
Cabin Altitude 10,000' (PSID 5.0)
If Fuel 18.1 gph, speed increases TAS 264 but CHT increase.
http://flightaware.com/live/flight/N334P
Comments? Analysis?
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