Monday, June 1, 2020

Why Draw of a propellor is required

 It is the distance between forward end of the propeller boss & fwd end of the taper of the tail shaft
 Significance :
 If propeller draw is diminished, the bedding of the propeller will be unsatisfactory, the contact surface area between the boss & the taper should not be less than 85% . Otherwise the coefficient of Friction between the two will be reached. Diminished prop. draw indicates the worn out taper end of the shaft, thus requires renewal of the propeller sleeve.

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