Jump to content

Sign in to follow this  
Guest bluepilot

AS Flight Plan data

Recommended Posts

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 ;-)

Share this post


Link to post
Share on other sites
Guest bluepilot

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

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...