AS Flight Plan data

[Guest bluepilot]

TRACKIf I compare an FS9 nav log to the AS nav log (of an imported FS9 flight plan) the Magnetic tracks don't agree precisely.I have long held that FS9 shows the INITIAL not AVERAGE track, and it seems that AS uses the better method of an average track for the route leg. Can anyone confirm?WIND VECTORPlease confirm that wind directions (aloft) are shown in degrees true. (To be sure.... to be sure...) TEMPA quick search of previous post revealed much ado about OAT, so I hope I'm not "flogging a dead horse" here.When flying a certain payware twin turbo-prop, which (before everybody shouts at me in unison) has both OAT and TAT indications, I find the OAT at around FL200 to be about 8-9 degrees C COOLER than forecast in the plan. This is not a faulty gauge, as I have confirmed the readings with FS Interrogate.At 250 kts TAS, this is about what I might expect the warming effect of compressibility to be.For example: Forecast(AS) -22.9, Actual(in flight) -31. Difference 8.1 degrees.My rule of thumb (for this aircraft's probe position at these lower speeds) is (TAS/85)^2 or 8.7 degrees C in this case. So, does the AS nav log show TAT in the TEMP column? It doesn't change with TAS as exepected...or are we just subjected to the same forecasting vagaries as we find in the real world ;-)

[JSkorna 137]

Hi,1. Yes2. Yes3. Vagaries!Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg

[Guest bluepilot]

Thanks Jim,Perhaps my question should have been as short and to the point!

[JSkorna 137]

Hi,No, you are OK!! I have been fighting the flu bug so I didn't feel like long explainations, but I thought I still should have answered you! Feeling a bit better now!Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg