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An aircraft is climbing with a 20° of climb angle and a 5° of angle of attack having a mass of 11,000 kg and aircraft thrust is 46082.75N then determine aircraft drag.(a) 33898.64 N(b) 52708.59 N(c) 82814.78 N(d) 8999.99 NI got this question in final exam.The query is from Cruising Performance in portion Cruising Performance of Aircraft Performance

Answer» CORRECT OPTION is (d) 8999.99 N

The explanation: Aircraft weight=mg=11000*9.81=107910 N.

Engine thrust: From EQUATING the horizontal forces we get the following equation: Tcosα=D+Wsinγ

D=Tcosα-Wsinγ

D=46082.75*COS(5)–107910*sin(20)

D=8999.99 N.


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