Ronerone From Jordan, joined Aug 2004, 1687 posts, RR: 52 Posted (8 years 1 month 3 weeks 5 days 10 hours ago) and read 32767 times:
What is the fuel burn rate per hour (or even minute) for A320, 738, and A332 aircraft during taxi-out and also when during a holding pattern before landing? And how would that rate compare to that when in normal cruise? Anyone any idea?
Any approximate figures would be great! Thanks!
A Stop Away From One-Stop, Is Non-Stop : Airbus A340-500
Flyf15 From , joined Dec 1969, posts, RR:
Reply 1, posted (8 years 1 month 3 weeks 5 days 7 hours ago) and read 32767 times:
I can't tell you for those types, but I can give you approximate numbers for the CRJ-200... it'll at least give you an idea of the ratios.
Approximate total burn pounds / hour
Taxi: 700 (Both engines and APU)
Takeoff: 6000-7000 (depending on temperature, elevation, reduced/full thrust, etc)
Climb: 6000-3500 (reducing as as altitude increases)
Cruise: 2500-3000 (depending on altitude/weight/etc... subtract 500 for long range, add 500 for high speed)
Holding: 1800-2400 (depending on altitude/speed)
Normal descent: 1500
Idle descent: 600
Approach: 2000 (fully configured)
Rick767 From United Kingdom, joined Jan 2000, 2662 posts, RR: 50
Reply 3, posted (8 years 1 month 3 weeks 5 days 4 hours ago) and read 32767 times:
Assuming sea level, ISA conditions:
A320 with CFM engines - about 270kg/hr (600lb/hr) per engine at idle (taxy)
A320 with V2500 engines - about 330kg/hr (730lb/hr) per engine at idle
A330 with RR Trent 772 engines - about 820kg/hr (1,800lb/hr) per engine at idle
Cruise fuel burn depends on so much, environmental conditions, cruise speed, altitude, weight, etc... but ballpark with a decent passenger load (total burn rates):
A320 - c.2,700kg/hr early in the flight (heavy) reducing to 2,300kg/hr before descent (lighter)
A330-200 with RR Trent 772's - c.6,100kg/hr early in the flight (heavy) reducing to c.5,400kg/hr before descent (lighter)
Holding pattern at typical landing weights (again decent passenger load assumed) will be roughly:
RSBJ From United States of America, joined Jan 2006, 153 posts, RR: 0
Reply 5, posted (8 years 1 month 3 weeks 4 days 11 hours ago) and read 32767 times:
A guide I use is weight/lb per hour at optimum altitude and LRC. The A320 (with CFM's) is 26.8bs per lb of fuel per hour, the 737-800 with winglets is 28.3. I don't know about the A330, though I can ask pops who flies them for US. It should be close to the 767-400, which is 34.3. I believe the best ratio is the 777NG at around 37.5, though I haven't had an opportunity to see the numbers for myself.
My method has a lot of flaws, but I find it useful nonetheless.