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Old 20th Jan 2006, 22:44
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DFC
 
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Thrust is created by the engine-propeller combination.

The propeller (for arguments sake) deflects air rearwards.

If the propeller pushed the air back at say 300kt then of course the aircraft should move forwards at 300kt.

Of course the very good propeller can indeed acheive said rearward airflow but the aircraft in the air at cruise will not acheive 300kt.

Ignoring drag.

Taking proeller slip into account, exaplain lift in the same newtonian terms and apply it to the wing.

Regards,

DFC
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