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Calculating specific fuel consumption...

This is a discussion on Calculating specific fuel consumption... within the Air Force & Aviation forum, part of the Global Defense & Military category; Ok i have found this site. http://www.jet-engine.net/miltfspec.html Can someone check if my calculations are correct or if im way off ...


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Old November 18th, 2007   #1
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Calculating specific fuel consumption...

Ok i have found this site.

http://www.jet-engine.net/miltfspec.html

Can someone check if my calculations are correct or if im way off target.

Now calculating for an F-15E using the F100-PW-229..

Dry thrust: 17,800 lb thrust
Wet thrust: 29,100 lb thrust
Specific fuel conumption dry: 0.726 lb fuel /lb thrust per hour
Specific fuel consumption wet: 2.060 lb fuel / lb thrust per hour

Now if an F-15 has 22,000lb of fuel


FULL AFTERBURNER
29,100lb of thrust * 2.060 = 59,946 lbs of fuel consumed per hour per engine.

With two engines thats 120,000lb of fuel consumed in one hour.

22,000 lb of fuel / 120,000lb of fuel = 0.1833 hours

So at full afterburner the F-15E will run out of fuel in 11 minutes.

Dry Thrust

17,800lb of thrust * 0.726 lb = 12,922 lbs of fuel consumed per hour per engine.

With two engines thats 25,845 lbs of fuel consumed in one hour

22,000lb of fuel / 25,845 of fuel = 0.8512 hours

So at full dry thrust the run out of fuel in 51 minutes.

Are my calculations above correct for both wet n dry power?

I must have calculated them wrong.

As If an F-15 can only travel 1000km/h at dry thrust then it would have a total range of under 1000kms?

Though if an F-15 cruises at 1000km/h with only 70% throttle fuel consumption will be alot less and the range will be reaching 2000kms..

Last edited by rjmaz1; November 18th, 2007 at 07:07 PM.
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Old November 19th, 2007   #2
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Last edited by weasel1962; October 20th, 2008 at 04:09 AM.
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