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*STOP PRESS* Coronavirus. A lot of Clubs have already cancelled all activities. Check carefully before you plan any travel

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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Bournville Sub Day, Sunday 13th September

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Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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    Rudders & motors

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    nikola_9
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    Rudders & motors Empty Rudders & motors

    Post  nikola_9 on 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
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    Rudders & motors Empty Re: Rudders & motors

    Post  david f on 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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    Post  nikola_9 on 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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    Post  david f on 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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    Post  nigele(ADMIN)2 on 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 on 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!)

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