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    Triple Screws
    by Rookysailor πŸ‡¬πŸ‡§ ( Captain)
    πŸ“£










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    8 Posts 7 Replies 3 Photos 15 Likes
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    Rookysailor
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    πŸ“ Triple Screws
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 14 hours ago
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    I think you might be right there Doug...😊

    Cheers, Pete
    1
    RNinMunich
    Fleet Admiral
    πŸ“ Triple Screws
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    Country: πŸ‡©πŸ‡ͺ Germany
    Online: 9 hours ago
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    I intend to do the same with my PT109 refit PeteπŸ‘
    Maybe it was 'Bill the Scratch' πŸ˜‰ doing a PTB refit!?
    😎
    2
    Young at heart πŸ˜‰ Slightly older in other places.;-/ Cheers Doug
    Rookysailor
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    πŸ“ Triple Screws
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Not a refit Doug, have had for a while the Italeri
    Elco 80' Torpedo Boat PT-596, as well as the Schnellboot s-100, so I was going to order the brass props but was unsure as to the format, I will take your knowledgeable advice, and use the port prop c.c. and the stb and centre clockwise.😊


    Cheers, Pete
    2
    RNinMunich
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    πŸ“ Triple Screws
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    Country: πŸ‡©πŸ‡ͺ Germany
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    In any case Pete, from what Rowen and I have found, the centre prop always seems to rotate the same as the starboard prop.
    Cheers, Doug 😎
    2
    Young at heart πŸ˜‰ Slightly older in other places.;-/ Cheers Doug
    RNinMunich
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    πŸ“ Triple Screws
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    Country: πŸ‡©πŸ‡ͺ Germany
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    I agree Rowen, πŸ‘
    The Brave class came much later and lessons had been learned!!
    Personally I would also use that set up with all triple screw models.
    Maybe the guys who restored that PTB just goofed?
    Or I've misinterpreted the photos?
    Cheers, Doug 😎
    2
    Young at heart πŸ˜‰ Slightly older in other places.;-/ Cheers Doug
    RHBaker
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    πŸ“ Triple Screws
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    Country: πŸ‡¨πŸ‡¦ Canada
    Online: 53 minutes ago
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    Doug,
    From my research of the Brave class the outer screws did counter rotate with the centre screw rotating clockwise.
    The twin screw Vosper RAF Rescue and Target towing boats had both screws rotating clockwise, large torque reaction as they had twin Sea Griffin engines!
    Rowen
    2
    RNinMunich
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    Country: πŸ‡©πŸ‡ͺ Germany
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    Hi Pete,
    I have read that the original Vosper triple screw boats (MTBs etc) all had three clockwise rotating screws, as seen from behind when going ahead.
    Find that hard to believe though due to the torque effect! Whatever.
    I have read that boats such as the USN PT Boats had the starboard and centre screws rotating clockwise and the port screw anti clockwise.
    But careful inspection of the props of a restored PTB in the States seems to suggest that they also all rotated clockwise when going ahead! See attached pics of PT 617.
    Pics show stbd, port and centre props in that order.
    Personally for a model I would prefer to have one prop (port) revolving counter-clockwise to reduce the torque effect. That's what I intend to do with my PT-109😊
    Hope this helps. Are we talking about a PTB refit here by any chance?πŸ˜‰
    Cheers, Doug 😎
    2
    Young at heart πŸ˜‰ Slightly older in other places.;-/ Cheers Doug
    Rookysailor
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    πŸ“ Triple Screws
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    What is the correct rotation on a triple screwed model? ie: Stb clock wise - Port anti clockwise,
    centre ?😁


    Cheers, Pete
    2



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