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Single motor for 1/72 U-boat.

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  • Single motor for 1/72 U-boat.

    HWSNBN,
    what size brushed motor would you recommend for use with Revell Type VII if one decides to go with a single motor driving both props through a counter rotating gearbox?
    Make it simple, make strong, make it work!

  • #2
    Originally posted by redboat219 View Post
    HWSNBN,
    what size brushed motor would you recommend for use with Revell Type VII if one decides to go with a single motor driving both props through a counter rotating gearbox?
    380, direct drive. Split.
    Resident Luddite

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    • #3
      Originally posted by He Who Shall Not Be Named View Post

      380, direct drive. Split.
      Got it.

      Another question, I've seen a Type VII being driven with a single motor driving only one shaft, would the boat suffer from assymetrical thrust?
      Make it simple, make strong, make it work!

      Comment


      • #4
        Originally posted by redboat219 View Post

        Got it.

        Another question, I've seen a Type VII being driven with a single motor driving only one shaft, would the boat suffer from assymetrical thrust?
        Yes it would

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        • #5
          From what I've read online and in books ( Das Boot) running on one engine was done to conserve fuel and to do maintenance.

          So I guess they trimmed the rudder(s) to compesate for the assymetrical thrust?
          Make it simple, make strong, make it work!

          Comment


          • #6
            The center line between shafts on a type VII are spaced fairly close together and hypothetically should also be parallel to each other. This reduces the asymmetrical thrust but does not completely eliminate it. So yes a slight rudder adjustment to counter act the thrust would be necessary proportional to the forward speed.

            Personally if the original boat had twin screws then I would make both operational regardless of how many motors it needed. I would not make them individually controlled in a model with such a narrow shaft spacing and parallelism.

            Comment


            • #7
              Originally posted by Monahan Steam Models View Post

              if the original boat had twin screws then make both operational regardless of how many motors it needed.
              I hear you. And less trimming needed.

              Make it simple, make strong, make it work!

              Comment

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