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Jeff D
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PT Boats of WWII
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PT Boats - General
Post a reply to: Speed of PT Boats?
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[StartQuote] Jerry, I really have to dig out Montgomery's other notebook from when he was conducting speed trials in Miami. Let's see here, in one entry in the book, he used PT-295 and PT-552, both using W-14 Packards. PT-295 is using 29/26 Props, while PT-552 is using 28/29. Three runs are made with a full war load and 2,000 gallons of fuel. Run 1 PT-295 44.010 Knots PT-552 45.113 Run 2 PT-295 43.690 Knots PT-552 45.000 Run 3 PT-295 44.227 Knots PT-552 45.456 ------------------------------------------------------------------------------------------------------ There was no RPM's given for this one test. In anther entry Montgomery writes down he also conducts a test with PT-487 using three runs with different RPM'S. For instance at 2,786 rpm, the boat produced a speed of 52.13 knots for the first run, the second run at 2,832 rpm. produced a top speed of 54.17 knots, and the third run at 2,695 rpm's produced a top speed of 51.30. I will not argue the point that in the war zone the motor macs were always trying to gain more speed, but I still never heard of any of the boats doing 75mph. Test's do not say altogether if they were carrying a full war load or how much fuel. Montgomery writes down in yet another entry in his book PT-487 doing 52.98 knots at 2, 670 rpm's. The boats never gave you the same speed in each run. [EndQuote]
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