MEM425pdfF08_4.RangeEndurance

MEM425pdfF08_4.RangeEndurance - MEM 425: Aircraft Design...

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MEM 425: Aircraft Design & Performance ** Range & Endurance Dr. Ajmal Yousuff Dept. MEM Drexel University
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Yousuff MEM 425 aircraft 2 Range & Endurance Range : total distance traversed on a given amount of fuel (in cruise) Endurance : total time in air on a given amount of fuel (in cruise) Depends on specific fuel consumption (sfc)
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Yousuff MEM 425 aircraft 3 Specific fuel consumption For piston engines: sfcis in terms of power For jet engines: sfcis in terms of thrust The units for sfc will differ. We will handle these separately.
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Yousuff MEM 425 aircraft 4 sfcfor prop sfc: weight of fuel consumed per unit time per unit power. of fuel ; . ( )( .) ( )( ) lb wt sfc ie hp hr power time   
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max min of fuel wt. mini: distance distance ( )( )( ) ( )( ) mini: ( )( ) distance lb sfc power time sfc power sfc thrust velocity RT  For max endurance (E) : For max range (R) : max min of fuel wt. mini: ( )( ) time time lb sfc power EP  Yousuff MEM 425 aircraft 5 Qualitative analysis for prop
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0 1 01 0 W W E WW dW
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This note was uploaded on 10/27/2008 for the course MEM 425 taught by Professor Yousuff during the Spring '08 term at Drexel.

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MEM425pdfF08_4.RangeEndurance - MEM 425: Aircraft Design...

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