Hi everyone,
in a B747 i always take off with the autothrottle set on SPD 250 up to 10,000 ft. After 10,000 ft to FL20 i set it to 280, then FL20-30 300, FL30+ 320.
I know this isn't how a real pilot would do it, but can anyone tell me the speed or altitude cross over point were a pilot would switch from spd to mach??
many thanks
KB
I usually set cruise speed (in mach) at around FL280 for the ascent and then change back to KIAS below FL280.
I set it at FL250, just because i like to get goign fast as soon as possible.
Kool Bus wrote:
Hi everyone,
in a B747 i always take off with the autothrottle set on SPD 250 up to 10,000 ft. After 10,000 ft to FL20 i set it to 280, then FL20-30 300, FL30+ 320.
I know this isn't how a real pilot would do it, but can anyone tell me the speed or altitude cross over point were a pilot would switch from spd to mach??
many thanks
KB
This depends on several factors such as weight, climatic conditions and of course the procedures stipulated by the airline.
I change from speed to mach when I change from area QNH to ISA and vis versa.
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