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Propeller blades in aeroplane are 2 m long i. When propeller is rotating at 1800 rev/min, compute the tangential velocity of tip of the blade. ii. What is the tangential velocity at a point on blade midway between tip and axis?

Propeller blades in aeroplane are 2 m long i. When propeller is rotating at 1800 rev/min, compute the tangential velocity of tip of the blade. ii. What is the tangential velocity at a point on blade midway between tip and axis?  

Grade:12th pass

1 Answers

SAHIL
3778 Points
7 years ago
Given : r 1 = 2 m, n = 1800 r.p.m = 1800 60 = 30 r.p.s 
Solution : i) Tangential velocity of, the tip of blade, vT1 = 2πnr.r1 = 2 × 3.14 × 30 × 2
∴ vT1 = 376.8 m/s
ii) Tangential velocity at a point midway between between tip and axis
, vT2 = 2πnr2 = 2 × 3.14 × 30 × 1
∴ vT2 = 188.4 m/s
 
THANKS
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