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Old 05-18-2018, 06:20 AM   #11
Bradader
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CHEERS BALTIC DRAGON ANY HINTS @ INFO MOST WELCOME THANK YOU .
REGARDS BADADER
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Old 05-18-2018, 01:58 PM   #12
flyco
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The problem with using ground speed for a tanker in a mission, is that if the wind at height is, say, 30 kts, your tanker could be going 60 kts faster along one leg that along the reciprocal.

A very approximate guide is that TAS = IAS x (1 + (Altitude in 1000s of ft x 0.02)). This gives an accuracy of better than 5-10%.

For example I like my tanker flying around 200 kias at 18,000 ft.
This requires a TAS of 200 x (1 + (18 x 0.02). Which is 272kts.
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