Exam Question

With reference to sleeved keyless propeller assemblies:

(a) (i) State, with reasons, the metals used in the manufacture of the sleeve and tail end shaft

(ii) State the type and thickness of material used to bond the sleeve to the propeller boss.

(b) When removing the propeller from the tail end shaft, state why the following procedures are not recommended:

(i) Application of push off force by means of wedges or jacks and draw off force by strong back

(ii) Expansion of propeller boss by concentrated local heating with gas torches.

Reference Answer