Find the ratio of the upstream

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1. A propeller 2 f t in diameter moves at 20 f t/s in water and produces a thrust of 1000 lbf . Find the ratio of the upstream to downstream velocities, and the efficiency.

2. An airplane flies at 140 mph at sea level at 60?F. The propeller diameter is 8 f t, and the slipstream has a velocity of 200 mph relative to the airplane. Find:

(a) The propeller efficiency.

(b) The flow velocity in the plane of the propeller.

(d) The thrust of the propeller.

(e) The pressure difference across the propeller disk.

Reference no: EM131354664

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