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Old 10th Mar 2006, 22:54
  #11 (permalink)  
Check Airman
 
Join Date: Mar 2006
Location: USA
Posts: 2,537
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Originally Posted by DFC
Are you comparing the altitude you plan to fly at (based on QNH) to the "Altitude" in the cruise tables which is based on 1013 / 29.92?

Also have you allowed for a non-standard temperature at that level?

If the actual conditions are different from standard atmosphere there will be a difference in planned and actual TAS.

As to what to do for range?

Actually, that really depends more on your groundspeed/fuelflow relationship thatn TAS/fuelflow relationship.

Regards,

DFC
I'm not sure what u're asking about the altitude, but the manual covers temperature deviations, which were factored.
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