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    Sea Nymph build - Motor and ESC
    by GraemeH πŸ‡¬πŸ‡§ ( Recruit)
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    14 Posts 13 Replies 5 Photos 21 Likes
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    brianupyonder
    Chief Petty Officer 2nd Class
    πŸ“ Sea Nymph build - Motor and ESC
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 13 hours ago
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    geoff did you mean the post on shopkeepers ripping you off
    brian
    ps
    may have sent you a post by mistake it was a bit of fun meant for boberro?
    1
    brian
    Rookysailor
    Captain
    πŸ“ Sea Nymph build - Motor and ESC
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Hi Graeme,
    I have a Sea Nymph, had it for some years now, the last update it had was a MFA 400 motor, and Mtroniks 15amp ESC with a 7.2 Nimh and a 30mm two blade prop, with that lot it is certainly fast enough, and everything fits in, regarding the rudder servo fitting, if you turn the servo on it's side, it will fit and with a short wire connector to the rudder arm, a bit tight, but try it.

    Cheers, Pete😊

    btw, If I can find the boat in the loft, will post some piccys.
    1
    GraemeH
    Recruit
    πŸ“ Sea Nymph build - Motor and ESC
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    Perfect, thanks Geoff. It helps to see what others have done. Once I get the lower hull sheeting on I’ll install the rudder and then take it from there, but as you say a cable drive may indeed be the best option.
    1
    brianupyonder
    Chief Petty Officer 2nd Class
    πŸ“ Sea Nymph build - Motor and ESC
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    will look for it later geoff
    thanks brianπŸ‘
    1
    brian
    mistyoptic
    Petty Officer 2nd Class
    πŸ“ Sea Nymph build - Motor and ESC
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Sorry posted before pics loaded also you might like this ref

    http://www.modelboats.co.uk/news/article/but-i-don-t-underst...

    Geoff
    http://www.modelboats.co.uk/news/article/but-i-don-t-understand-electronics/18054
    πŸ”—
    3
    Geoff L.
    mistyoptic
    Petty Officer 2nd Class
    πŸ“ Sea Nymph build - Motor and ESC
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    Graeme, I see you have experience with cars and Gliders so I expect you are not trusting the knowledge you already have. I too have been down the aircraft route and flew electric for 20+ years and the knowledge gained there has well prepared me for my moved back to model boats.
    Why not move the servo into the middle bay of the boat with a rod or snake connection, My Mantua Mincio has the rudder servo within the main body of the model and this is an 18 inch hull too. The Morston is an altogether bigger boat so there is room for the servo adjacent to the rudder and the Diva is likewise. See pics.
    The Mincio, runs on a little 285 motor connected to propshaft with a rubber band, if it were fitted with a brushless it would be out of the pond in no time at Woodbridge.
    Geoff L.
    2
    Geoff L.
    Martin555
    Fleet Admiral
    πŸ“ Sea Nymph build - Motor and ESC
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    Hi GraemeH,
    Re :- your local hobby shop.

    Most hobby shops are extremely helpful but some unfortunately are not when they fined out that this is your first boat then all they see is the ££££££ signs in front of there eyes and rely on the fact that you have no clue so they recommended some of the most expensive equipment they can.

    It is a good job that we have very knowledgable members on this site that are prepared to help.

    Martin555.
    1
    If it looks right it probably is.
    GraemeH
    Recruit
    πŸ“ Sea Nymph build - Motor and ESC
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    Thanks Geoff and MTurpin,

    Yes I did feel like the 2822 brushless would be a bit overpowered, but that’s what the manufacturer suggest. I’ve got no experience to base the motor size on, there doesn’t seem to be any specs listed for the props stating required torque or anything else that would help choose a motor. I know how to work out speed from prop pitch, but no way to work out how fast a given motor will be able to turn the prop.

    I was surprised at the watercooling also, I’ve run many Tamiya cars with their own ESC and 540 Motors, and that only has a heatsink which is fine even when it’s deep inside the bodywork.

    However it seems marine brushless ESC, even only a few amps, all have watercooling.

    Geoff the AeroNaut kits look really nice, the quality of the build instructions put the Sea Nymph kit to shame! Those HAKits look interesting too. One issue with the Sea Nymph is the tiny area at the back for the rudder servo - does your Morston have the servo at the back end? I’m thinking about moving the cockpit aft bulkhead forward to make more space for the steering gear, and fabricating a hatch for the aft end so I can still get access.
    2
    mistyoptic
    Petty Officer 2nd Class
    πŸ“ Sea Nymph build - Motor and ESC
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    Brian , See my reply to Greame H
    Geoff
    1
    Geoff L.
    mistyoptic
    Petty Officer 2nd Class
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    The MFA 385 runs happily on a 7.2v Nimh and is simpler to use and charge.
    NiMh are still good for boats where weight is not a consideration.
    Geoff L.
    1
    Geoff L.
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