For example, how much extra fuel is needed for a 747 to go from FL 360 to FL 380?
2006-07-14 04:11:18 · 4 answers · asked by presidentrichardnixon 3 in Cars & Transportation ➔ Aircraft
To be more specific, how much fuel is required to increase the thrust of the engines while climbing.
2006-07-14 04:36:47 · update #1
It all depends on the rate of ascent and your need to maintain forward velocity (airspeed).
If you keep airspeed constant (by increasing thrust) and your climb rate is low you'll probably burn less fuel than if your climb rate is extremely high.
The 747 Flight manual states that between FL330 and 410, the climb rate should be between 1,500 and 2,000 feet per minute (fpm). Cruise speed varies based on load... and as fuel burns, the aircraft is lighter and there's a change in speed.
The only info I have regarding fuel consumption is:
FL370 -> 6,500 lbs/hr (times 4 engines)
FL350 -> 7,200 lbs/hr (times 4 engines)
You should consult the Flight Manual for this aircraft and use a flight computer to calculate fuel usage.
2006-07-14 04:31:48 · answer #1 · answered by Lucas P 3 · 0⤊ 0⤋
There is too many variables to come up with a distinct answer.
Only the Aircraft Operating manual - Performance Section would give a definitive answer, but suffice to say a '47-400 burns about
28,000 - 30,000 lbs/hr at normal cruise FL's
2006-07-14 12:13:56 · answer #2 · answered by helipilot212 3 · 0⤊ 0⤋
Nothing, just stall the engines.
2006-07-14 11:15:12 · answer #3 · answered by droblivion 2 · 0⤊ 0⤋
none just increase pitch of the wing and sacrifice airspeed.
2006-07-14 14:36:55 · answer #4 · answered by JCCCMA 3 · 0⤊ 0⤋