The PT Boat Forum & Message Board - Mystery PT Boat Engine Transmission Componant

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Topic: Mystery PT Boat Engine Transmission Componant - Missing Post Recr

Dick Moderator	Posted on: May 25, 2024 - 3:31pm
	Mystery PT Boat Engine Transmission Componant - Missing Post Recreated April 17 2024 Posted By: Andy Small Topic: Mystery PT Boat Engine Transmission Componant Great work! You letting the museum know? ____________________________________ April 17 2024 Posted By: Jerry Gilmartin Reply: Mystery PT Boat Engine Transmission Componant Yes I will be sending it over today. ___________________________________ April 19 2024 Posted By: JEno Reply: Mystery PT Boat Engine Transmission Componant Great research find!!! Well done. I had spoken with Mr. Ruth at U.S. Crash Boats. We had a long discussion, but he had never heard of such a unit. I would think that he would be interested. May I copy and forward the posted information to him? ____________________________________ April 20 2024 Posted By: Jerry Gilmartin Reply: Mystery PT Boat Engine Transmission Componant Hello JEno Yes that is fine with me. I wrote an email to them 2 weeks ago and have not heard back from their group yet. _____________________________________ April 23 2024 Posted By: PRJM3 Reply: Mystery PT Boat Engine Transmission Componant Great find, Jerry, and mystery solved! I found another reduction gearbox that was used in Air Sea Rescue boats, but it was an angle drive or V-drive used in the 85-foot boats. Working from memory, it was something like a 1.5 to 1 reduction unit and used bevel spur gears. As the 85-foot boat used two Packard engines versus the three in a PT boat, the reduction gearing falls in line with my thinking that they were "geared down" for the reduced power-to-weight ratio. The 104-foot boat would fall into the same category. I found that information on the uscrashboats.org site, including schematic drawings of the reduction gear box used in the 85-foot boats. I did not find anything on that site for the 104-foot boats but may have missed something. _____________________________________
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