The Association of Model Submariners.

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* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



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*2021 AND SOME EVENTS ARE BEING PROPOSED. Keep them coming and let us know the details! (amstreasure@googlemail.com)

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Model Sub Weekend, 28th, 29th August. Bluewater Parkway, Greenhithe, DA9 9

Bournville Sub Day. Sept 2021 is looking likely. More details TBA.

Barrow in Furness Regatta and Sub day. Maybe in Sept 2021. Details TBA.

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    Rudders & motors

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    nikola_9
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    Rudders & motors Empty Rudders & motors

    Post  nikola_9 Fri May 06, 2011 7:17 pm

    Hi everybody,

    I'm Nikola and I'm new to this website. I'm building a small water vehicle, just for hobby, and actually I don't have a big culture on the topic. I was looking for ideas about rudders.
    My submarine is a sort of underwater catamaran, and I want you guys to know if it’s possible to control the pitch motion (I mean the rotation around the transversal axis of the vehicle) and the roll one (I mean the rotation around the longitudinal axis of the vehicle) just with two rudders, one behind every hull, rotating around an axis parallel to the horizontal plane and normal to the hulls axes.
    Then, how can I actuate a rudder? Are there a motor and a reducer to make it rotate, or the rotation is given in another way (linear actuator and transmission)?
    Then, if someone is so kind to answer me, I just want you to know which website can I look at to find DC motors, with small dimensions, maybe used in underwater modeling (max 300 mm length), able to reach a power of about 2 kW.

    Thanks a lot,

    Nikola
    david f
    david f
    AMS Treasurer

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    Rudders & motors Empty Re: Rudders & motors

    Post  david f Sat May 07, 2011 9:45 am

    Yes to the effect of rudders.That is a good basis.
    For turning them, you need servos. Available in many sizes and torques. Servos will be controlled from a R/C receiver - assuming that is what you are using.
    Have a look at various suppliers of R/C equipment for motors and servos. By the way 2kW sounds like much too big a motor.
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    nikola_9
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    Rudders & motors Empty Re: Rudders & motors

    Post  nikola_9 Sat May 07, 2011 11:07 am

    Thank you David.
    So, no other fixed appendices (rudders) close to the bow?
    Then, apart for the power, which probably is too big, are DC motors used in this kind of models the same used in industrial application?
    david f
    david f
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    Rudders & motors Empty Re: Rudders & motors

    Post  david f Wed May 11, 2011 5:59 pm

    Yes you should be able to control everything from the stern.

    You probably want large control surfaces and slow revving, large props.

    Yes, standard DC motors probably geared down.

    Brushless perhaps, if you get the prop revs down.
    nigele(ADMIN)2
    nigele(ADMIN)2
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    Rudders & motors Empty Re: Rudders & motors

    Post  nigele(ADMIN)2 Wed May 11, 2011 6:10 pm

    Sounds like a prime candidate for a uni directional kort nozzle,perhaps between the sponsons,???
    david f
    david f
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    Rudders & motors Empty Re: Rudders & motors

    Post  david f Thu May 12, 2011 5:59 pm

    It does doesn't it.

    (Nice to hear you on here again, Nigel)

    (BTW chaps - I'm not able to respond to emails at the moment - password problems!)

      Current date/time is Thu Jul 29, 2021 4:18 pm