Table (2) Rubert Grade

Cost of propeller roughness relative to Rubert Grade A ($/annum)
Constant Speed Operation Constant Power Operation
SHIP A
SHIP B
SHIP C
SHIP A
SHIP B
SHIP C
B (approx)
C
D
E
F (approx)
15,000
54,000
106,000
155,000
205,000
3,000
14,000
32,000
52,000
70,000
5,000
24,000
55,000
89,000
122,000
10,000
36,000
71,000
103,000
135,000
3,000
13,000
29,000
46,000
62,000
10,000
48,000
109,000
174,000
240,000