Page 263 - Introduction to Naval Architecture
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248 PROPULSION
From the propeller curves presented in Figure 9.15, which are for a
four bladed propeller of 0.4 blade area ratio:
This QPC happens to be the same as that assumed in the calculation of
power. Had it differed significantly then a repeat calculation would
have been needed using the new value. The process can be repeated for
other propeller revolutions to see how the propeller dimension and
QPC would vary. For N = 110,
