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PT Boat Forum
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PT Boats of WWII
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PT Boats - General
Post a reply to: Engine Idenity
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[StartQuote] Hi Frank and Dick and AL and everyone else! So I poured through my files and the Louisiana Digital Library [url]http://louisdl.louislibraries.org/[/url] and found some interesting stuff to answer these questions. Frank first of all, why do you always ask so many hard questions? OK so here goes. To see these blueprints for yourself, just go the the Louisiana Digital Library, then under the heading Browse Collections by (in the top left hand side) click on the line labeled Collection Name. Then the next page comes up listing all the collections. Scroll down until you see Higgins Industries and click on it. Then Click on Browse Items in this Collection hypertext, and 32 pages of 639 numbered blueprints will be listed. There are about 20 per page and 32 pages on the index. I think Franks question is about a photo of the 76 foot Motor Torpedo Boat According to the blueprint named Inboard Profile and Arrangement It is listed as drawing 355 on page 18, and is dated 8-18-41. This is not PT5 or PT6. It shows the overhead and side views of the engineroom and the Watertight door is on the centerline of the forward bulkhead. Several other blueprints to support this are #112 Cooling System for Vimalerts on PT5. listed on Page 6 #85 Center Engine Exhaust Pipe (apparently for 76 foot MTB) dated 6-30-41 on page 5. #686 Vimalert Engine Exhaust Pipes on page 32 OK so here is the blueprint section I hope this shows up OK. Jerry [image]http://i130.photobucket.com/albums/p249/ptboats/FrankAndruss/Higgins76ftengineroom.jpg[/image] Next is another picture of the same engines from the perspective of the watertight door. If you look treal hard you can see the word Scott as in Hall Scott Defender engine on the front of the engine in the background, (the word is framed by the ladder rungs). [image]http://i130.photobucket.com/albums/p249/ptboats/FrankAndruss/00000011.jpg[/image] Next is a couple of photos of the real Vimalert engines, and if you compare the engineroom pictures to these actual Vimalerts you can see they are difinitely different. Side view of Vimalert Engine [image]http://i130.photobucket.com/albums/p249/ptboats/FrankAndruss/00000009.jpg[/image] Front view of Vimalert engine ( notice how different it is from one in engineroom picture! [image]http://i130.photobucket.com/albums/p249/ptboats/FrankAndruss/00000010.jpg[/image] In summary, this is why I think these are Hall Scott engines inside of PT70 aka MRB2 taken sometimes in late 1941 Jerry Jerry Gilmartin[EndQuote]
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