Question.

(a)  State why fixed pitch propellers have a poor efficiency when going astern.

(b) With reference to controllable pitch propellers, state:

(i) Why is it preferable that the main servomotor be housed in the propeller hub rather than in the shafting forward of the propeller shaft ?

(ii)What regular maintenance and checks should be carried out to ensure maximum - reliability of the gear at all times; Make

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FEB 2020