Use of FLCH or VNAV at low altitude after takeoff
Interesting discussion. I have a related question
I fly the Dassault Falcon 2000. At heavy weights, selection of FLCH or VNAV programmed speed after takeoff results in a very shallow climb rate during acceleration to set altitude, down to the minimum limit of 250 FPM. This especially true when departing an airport in Class B airspace and accelerating immediately to 250 kts. The resulting low altitude acceleration can get quite exciting if selection is made less than 1,000 ft.
With that in mind, may I inquire as to:
1) What is the normal airline all-engine acceleration height?
2) Does selection of FLCH or VNAV mode at that altitude provide sufficient rate of climb for terrain clearance or is V/S mode needed to get the aircraft climbing faster.
3) Do some airports require different procedures? For example Las Vegas.
4) What altitude is the A/P normally engaged in the FLCH or VNAV mode?
As a corporate pilot, we're not always aware of these standard procedures.
Thanks,
Rich Boll
Wichita KS