PPRuNe Forums - ATC 'on conversion'........

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NacelleStrake

15th Jul 2012 10:02

ATC 'on conversion'........

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

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.

jc2065

15th Jul 2012 10:50

ATC 'on conversion'........

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.

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