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The PT Boat Forum ª PT Boats of WWII ª  PT Boats - General

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

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Dick   Send Email To Dick 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?

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April 17 2024
Posted By: Jerry Gilmartin
Reply: Mystery PT Boat Engine Transmission Componant

Yes I will be sending it over today.

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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?

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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.

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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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