rampoperator
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Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 1:59 am

Is there a list of fuel burn for taxiing aircraft (default engine).
 
kaddyuk
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 2:06 am

Airlines tend to use what they call "Standard Figures" I think its about 1 Tonne of fuel at LHR for a B747-400. Two tons might be used at larger airports such as JFK. I will guess that the airlines will monitor the fuel usage during taxi and adjust the standard figure based on their findings
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wing
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 2:23 am

2 tons fuel for taxi !!? That must be one hell of a beast but I know nothing about the 747.

What I can comment about is for the planes that I used to fly and now I am flying.We used standart figures 130 kg for 737400, 150 kg for 737800, 280 kgs now for the A 320/321.
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Grbld
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 2:32 am

It is a standard figure and also takes into account the fuel burn by the APU while in the turnaround and engine start. We use 200kg for the 737NG.

Grbld
 
Tristarsteve
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 4:40 am

The flight planning system used by larger airlines adjusts the taxi fuel by airport and time of day. I see different figures all the time, but around 200kg for A320 and 400kg for B777, this with an average 10 min taxi.
 
PhilSquares
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 4:42 am

At SQ, on the 744 we use a standard of 1,000kgs. It's up to the Captain if he wants more for places such as LHR, ORD, JFK where there is a chance of a ground delay.

I'd say that 1000kgs is on the generous side.
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Okie
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 4:48 am

Thanks for the answers

Using the 130kg figure using rough numbers that works out to about 40 US gallons.

Using the SWAG method (scientific wild a$$ guess) of 50% used by APU, gate time, temp, and apu load would obviously vary.

I would suspect a rough number of about 25% used by each turbine on a narrow isle twin or about 10 gallons saving for a single engine taxi.

@$2.00 per gallon about $20.00 per single engine taxi savings
@$2.50 per gallon about $25.00 per single engine taxi savings

So if you are talking a large fleet at 7 flights per day per aircraft using the $20 savings you are looking at $140 per day per aircraft. A large fleet would make a substantial savings.

Okie
 
jspitfire
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 4:58 am

For the Cessna 172 we estimate using 1.1 gallons for taxiing and the run-up. And for the Twin Comanche, which has virtually the same engines as the 172, we use 2.2 gallons.  Smile

Jason
 
kaddyuk
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 8:08 am

Well, its not uncommon at places such as JFK and LHR to have taxi times around the 40-50 minute mark.

Your APU will burn about 500 kgs per hour on a B747-400. Interestingly, on our aircraft, the engines are GE but the APU is PW  Wink.
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QANTAS747-438
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 3:10 pm

500 lbs of gas for taxi-fuel for a 733, 735, 737NG for WN plus an additional 100lbs in engine one for startup fuel.
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CX Flyboy
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RE: Fuel Burn For Taxiing Aircraft

Wed Jan 04, 2006 4:13 pm

We allow for 500KGs on the 777. This accounts for about 30mins of APU (After fuel is on board) and for taxi fuel. We normally get away with using just less than this...but sometimes it can be more.
 
goboeing
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RE: Fuel Burn For Taxiing Aircraft

Thu Jan 05, 2006 1:02 am

A dispatch release from a B-747-200F flight I was on shows 3,000 pounds for taxi fuel and that was at JFK at 3:00AM.

Nick
 
XFSUgimpLB41X
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RE: Fuel Burn For Taxiing Aircraft

Thu Jan 05, 2006 2:15 pm

The CRJ-200/440 with GE CF34-3B1 engines will typically burn about 360-380 pounds per hour per engine. Taxi burn is planned between 200-800 pounds depending on the length of taxi and airport.

I utilize single engine anytime a long taxi is planned to double the amount of time I can taxi around before breaking into contingency fuel.
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longhauler
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RE: Fuel Burn For Taxiing Aircraft

Fri Jan 06, 2006 12:30 am

We use 200Kgs taxi fuel for the A319/320 and 300Kgs for the A321. For forecast long taxis or deicing, additives are applied.
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CosmicCruiser
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RE: Fuel Burn For Taxiing Aircraft

Fri Jan 06, 2006 12:38 am

1500-2000lb for our MD-11
 
doug_or
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RE: Fuel Burn For Taxiing Aircraft

Fri Jan 06, 2006 1:04 am

DHC-8 uses about 260 lbs/hr per side for taxi. If you feather you can bring it down to 160 or so. We usualy taxi on 2 engines @ outstations where we have a short wait, but at the hubs we'll go out on 1.
When in doubt, one B pump off
 
wheeltug
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RE: Fuel Burn For Taxiing Aircraft

Sat Jan 28, 2006 6:41 am

An interesting discussion  Smile I run a company that is developing a ground propulsion system which uses electric motors placed inside the front wheels to drive around (backwards and forwards) on APU power alone. Anybody want to hazard any guesses as to what the fuel savings might be for particular aircraft. I for one, don't know, I just started the job  Smile I'm just trying to figure out which aircraft model would be the best target for our first product: Big, but few flights or small but lots of flights.
 
2H4
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RE: Fuel Burn For Taxiing Aircraft

Sat Jan 28, 2006 6:52 am



Welcome to the forum, Wheeltug! Keep us posted on the progress of your product.

By the way....is this it?






2H4


Intentionally Left Blank
 
rsbj
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RE: Fuel Burn For Taxiing Aircraft

Mon Jan 30, 2006 12:20 am

The CFM56-7b on our 700's burn about 650 Lb/hr per engine with no bleed, and 690 with engine bleeds on. I think if you divide the certified thrust by 40 to 50, you'll be real close to ground idle fuel burn per hour on just about any modern high bypass fan.
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dispatchguy
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RE: Fuel Burn For Taxiing Aircraft

Tue Jan 31, 2006 9:39 am

For the CRJ700; I have programmed into our SABRE flight planning system 250 lbs for everywhere but ORD during the late afternoon; then I have 400 lbs programmed in.


But, if you have a good gate close to 32L-T10, you get right out...
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wheeltug
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RE: Fuel Burn For Taxiing Aircraft

Thu Feb 16, 2006 7:46 pm

That is it, although just a demo model. As another poster in another thread pointed out, it wouldn't exactly retract nicely.

I've taken a long time to respond because I've been hard at work learning as much as I can learn and putting together a new web site. Being as I'm not an aerospace guy by birth (just a finance guy by training, actually) I'd love it if people wanted to take a look at the new website before it went public to correct my mistakes. It's at www.wheeltug.gi/beta.

Many many thanks!

Joseph
 
yow
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RE: Fuel Burn For Taxiing Aircraft

Tue Oct 03, 2006 3:24 am

Quoting LongHauler (Reply 13):
We use 200Kgs taxi fuel for the A319/320 and 300Kgs for the A321. For forecast long taxis or deicing, additives are applied.

LongHauler or anyone else on here, do you allocate 200 Kgs across the board for 319/320s or do you allocate more for large airports like YYZ & YVR (say 250 kgs) and less ground burn fuel at smaller airports like YOW & YHZ say (175 kgs)?

How does an A320 compare to a 73G or 733?
 
Lemurs
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RE: Fuel Burn For Taxiing Aircraft

Wed Oct 04, 2006 4:54 am

It's a fantastic idea...electric motors are great for generating gobs of torque from a very small package, and that's all you really need for groud ops on an airplane. It's hard to think of a worse way to move an airplane on the ground than a jet engine, really. Maybe several million mice on a very large treadmill...  Wink
There are 10 kinds of people in the world; those who understand binary, and those that don't.
 
Tristarsteve
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RE: Fuel Burn For Taxiing Aircraft

Wed Oct 04, 2006 5:03 am

Quoting YOW (Reply 21):
LongHauler or anyone else on here, do you allocate 200 Kgs across the board for 319/320s or do you allocate more for large airports like YYZ & YVR (say 250 kgs)

When we get the flight plan it has a suggested taxi fuel that varies from 140kg up to 250kg. The flight planning computor has averaged out the taxi times for different airports at different times of day and suggests a mean. The pilot can then adjust this to allow for local conditions. (A320).
 
doug_or
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RE: Fuel Burn For Taxiing Aircraft

Wed Oct 04, 2006 5:43 am

Quoting YOW (Reply 21):
do you allocate more for large airports

Absolutely. We see 400+ lbs for LGA and sometimes 100 or less @ outstations.
When in doubt, one B pump off
 
Alessandro
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 5:10 am

Wheeltug, thanks for the link just remove the dot in the end,
www.wheeltug.gi/beta
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N231YE
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 5:50 am

For a Cessna 172, taxiing for about 10 minutes, and including the run-up, I typically factor in 1 gallon.
 
dl757md
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 6:08 am

Quoting Kaddyuk (Reply 8):
Your APU will burn about 500 kgs per hour on a B747-400

Just curious, I've never worked on the 744. I'm not sure how accurate the info I have on them is but the ICAO says the 747 APU uses 11 lbs/min or 300kg/hr. It also says the 777 uses 9 lbs/min which is higher than the actual limit of 466 lbs/hr or about 7.8 lbs/min. Have you actually seen the APU on a 744 burning 500kg/hr?

DL757Md
757 Most beautiful airliner in the sky!
 
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Starlionblue
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 6:30 am

Quoting Okie (Reply 6):
I would suspect a rough number of about 25% used by each turbine on a narrow isle twin or about 10 gallons saving for a single engine taxi.

Unfortunately you're assuming that taxi on one engine uses half the fuel of taxi on two. I would think the number is a bit higher than that, but still lower than two engine taxi.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
uadc8contrail
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 1:24 pm

iirc ua895 takes a 2600lb taxi at ord and thats usually c16 to 32L full length
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jetmech
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RE: Fuel Burn For Taxiing Aircraft

Sun Oct 08, 2006 7:17 pm

Quoting Lemurs (Reply 22):
It's hard to think of a worse way to move an airplane on the ground than a jet engine, really.

I fully agree with you there Lemurs, the propulsive efficiency of almost zero whilst a jetliner taxis on the ground in no way makes up for the fantastic thermodynamic efficiency that the engine may be capable of.

Quoting Dl757md (Reply 27):
Have you actually seen the APU on a 744 burning 500kg/hr?

I am not so sure with the 744 DI757md, but the dragon (APU) on a B747 classic was more than capable of going through that much juice.
JetMech split the back of his pants. He can feel the wind in his hair :shock: .

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