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Old 15th Jul 2012, 10:02   #1 (permalink)
 
Join Date: Jun 2011
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ATC 'on conversion'........
What does 'on conversion' mean please?
NacelleStrake is offline   Reply
Old 15th Jul 2012, 10:35   #2 (permalink)
 
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In which context?
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Old 15th Jul 2012, 10:43   #3 (permalink)
 
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When speed converts from a Mach number to a number indicated in knots.
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Old 15th Jul 2012, 10:47   #4 (permalink)
 
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Epiphany. Thank-you Mr Ripley...
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Old 15th Jul 2012, 10:49   #5 (permalink)
 
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ATC 'on conversion'........
I believe you're referring to the point in descent at which jet aircraft revert to using indicated airspeed as opposed to Mach number. So ATC might say to a descending aircraft using a Mach speed; "Speedbird 123, make your speed 260 knots on conversion"

And when the aircraft descends through the point at which it starts using indicated airspeeds again, 260 knots is the ATC-imposed speed limit.
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Old 15th Jul 2012, 10:50   #6 (permalink)
 
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ATC 'on conversion'........
What he said....
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Old 15th Jul 2012, 16:04   #7 (permalink)
 
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Prefer to hear '300 kts or greater on conversion'!
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Old 16th Jul 2012, 00:16   #8 (permalink)
 
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On airbi when asked to pedal hard seems to be somewhere aroun FL290.

Doubtless a question on the techies forum would give a more complete answer.
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