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PT Boats of WWII
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PT Boats - General
Post a reply to: PT 761 Class
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[StartQuote] Might have found some info on the whole shifting the ordnance aft. A 2 Aug 45 Board of Inspection and Survey letter, subject: PT613 preliminary trials to the SecNav stated No more weight should be added to increase the trim by the head, as on starboard turns particularly at high speed, there is now a tendency to dip forward. I also was interested in the new 20mm location and it seems that was another hot topic with a request that the forward arrangement of weapons be re-studied and that the new position of the 20mm was now inadequate (too near side of vessel). Big problem with shifting stuff aft is it makes it hard for a boat to turn since you need the bow or a fin to build the turning moment. So in a 31 Oct 45 letter from the Supervisor of Navy Yard, NY, PT's 613, 616, 617, and 618 were to have a horizontal fin installed. I assume this would have been similar to the one installed on the Elco Planes boats such as PT487. This info was from the Naval War College Archives. [EndQuote]
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