1) Trailing edge 2) Face 3) Fillet area 4) Hub or Boss 5) Hub or Boss Cap 6) Leading edge 7) Back 8) Propeller shaft 9) Stern tube bearing 10) Stern tube
its not a answer but its basically instead of saying finite life its life span of that part of the plane. so like the suspension has a life span because its always being used having high forces being...