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flying jocks · 26th August 2008, 17:42

Does anybody have any useful rules of thumb? For example this is one that I was told the other day:

Whilst flying a normal (assume 3º glide) approach, the last point at which you should put the gear down to achieve stability criteria before touchdown is calculated as so:-

Look at the g/s from your Nav. Display and multiply by 10, then add the runway elevation to give you the answer in feet (QNH). I fly the A319 and incredibly it seems to work.

Example:

Thr. elevation = 1500ft
Groundspeed = 190 Kts

190 X 10 = 1900
plus elevation of 1500 ft = 3400' AMSL.

Below this point the a/c will not slow down quick enough to be stable at 1000 ft AAL.

FJ

26th August 2008, 17:42	#1 (permalink)
flying jocks Join Date: Aug 2000 Location: UK Age: 37 Posts: 50	Rules of thumb Does anybody have any useful rules of thumb? For example this is one that I was told the other day: Whilst flying a normal (assume 3º glide) approach, the last point at which you should put the gear down to achieve stability criteria before touchdown is calculated as so:- Look at the g/s from your Nav. Display and multiply by 10, then add the runway elevation to give you the answer in feet (QNH). I fly the A319 and incredibly it seems to work. Example: Thr. elevation = 1500ft Groundspeed = 190 Kts 190 X 10 = 1900 plus elevation of 1500 ft = 3400' AMSL. Below this point the a/c will not slow down quick enough to be stable at 1000 ft AAL. FJ