View Full Version : ATC 'on conversion'........
NacelleStrake
15th Jul 2012, 10:02
What does 'on conversion' mean please?
hvogt
15th Jul 2012, 10:35
In which context?
mr ripley
15th Jul 2012, 10:43
When speed converts from a Mach number to a number indicated in knots.
NacelleStrake
15th Jul 2012, 10:47
Epiphany. Thank-you Mr Ripley...
jc2065
15th Jul 2012, 10:49
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.
jc2065
15th Jul 2012, 10:50
What he said....
mr ripley
15th Jul 2012, 16:04
Prefer to hear '300 kts or greater on conversion'!
Nubboy
16th Jul 2012, 00:16
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.