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Calculating specific fuel consumption...

Discussion in 'Air Force & Aviation' started by rjmaz1, Nov 18, 2007.

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  1. rjmaz1

    rjmaz1 New Member

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    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: Nov 18, 2007
  2. weasel1962

    weasel1962 New Member

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    Last edited: Oct 20, 2008