12.Design.thrust

12.Design.thrust - MEM 425: Aircraft Design &...

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MEM 425: Aircraft Design & Performance Thrust-to-weight & wing-loading
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T/W and W/S determination Need to estimate fairly accurately for initial layout power plant, engine W/S wing size & W/S are inter-related Ex: take-off
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Thrust-to-Weight Ratio High T/W yields: Quick acceleration Rapid climb Higher V max Higher turn-rates Higher fuel-consumption For prop a/c, use Power Loading (W/hp): (~ 10-15) 550 p prop T hp W V W   
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Statistical estimate of T/W Trainer 0.4 Fighter (dog) 0.9 Fighter (other) 0.6 Military 0.25 Transport 0.25 Table 5.1
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T/W by curve-fit We can ascertain the dependence of on velocity by curve fitting. (Tables 5.3 & 5.4) Aircraft a C Jet trainer 0.488 0.728 Jet transport 0.267 0.363 Single engine 0.024 0.22 Twin engine
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This note was uploaded on 04/26/2011 for the course MEM 425 taught by Professor Yousuff during the Spring '08 term at Drexel.

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12.Design.thrust - MEM 425: Aircraft Design &...

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