It's conspiracy nuttery to believe that a PT boat can out turn a destroyer?
I think I'm seeing the intellectual prowess that's led you to be in the barrel for Ron Paul.
Only a conspiracy nut would question what happened to Kennedy and PT109.
A PT boat can outturn a destroyer if it sees it in time.
Collision! PT-109 was one of the boats left behind. Lieutenant Kennedy rendezvoused his boat with PT-162 of his own patrol section and PT-169, which had been separated from another section, and the three boats spread out to make a picket line across the strait. At about 2:30 in the morning, a shape loomed out of the darkness three hundred yards off PT-109's starboard bow. So difficult was visibility that it was first believed to be another PT. When it became apparent that it was one of the Japanese destroyers, Kennedy attempted to turn to starboard to bring his torpedoes to bear. But there was not enough time. The destroyer, later identified as the Amagiri, the escort ship of the Express, struck PT-109 just forward of the forward starboard torpedo tube, ripping away the starboard aft side of the boat. Less than a minute had passed since the first sighting. http://www.jfklibrary.org/Historical+Resources/JFK+in+History/John+F.+Kennedy+and+PT109.htm