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PT Boat Forum
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Dick
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Jeff D
The PT Boat Forum
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PT Boats of WWII
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PT Boats - General
Post a reply to: Torpedo Tube guides
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[StartQuote] After looking at the photos and drawings, I think I agree with Jeff - there had to have been a mechanical holddown of some sort. Here's my thoughts (remembering I have no engineering background...[:-question-:]) [IMaGe]http://i73.photobucket.com/albums/i204/alross2/turntable.jpg[/IMaGe] There are four slots in the turntable base vertical tube. The saddle tube fits down over the turntable base tube and has four bosses on it. Each boss has a large diameter hole and a small diameter hole. I didn't see any text about threads on the drawing, but would guess that a plate with a large diameter pin welded to it would be attached to the boss with a bolt through the smaller hole after the saddle tube was placed over the turntable tube. The pin would be long enough to pass through the slot, acting as a stop for vertical movement. The interior gussets in way of the slot may have had a corresponding slot milled in their edge where they met the tube, but that wouldn't be much of a problem. The elongated slots would allow the tube to pivot (only 12 degrees needed) and would act as a mechanical stop (pin hitting the end of the slot) to prevent an overzealous torpedoman from cranking the tube too far. Plausible?? Al [EndQuote]
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