π Sea Nymph build - Motor and ESC
3 years ago by
π¬π§ GraemeH (
Recruit)
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Perfect, thanks Geoff. It helps to see what others have done. Once I get the lower hull sheeting on Iβll install the rudder and then take it from there, but as you say a cable drive may indeed be the best option.
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π Sea Nymph build - Motor and ESC
3 years ago by
π¬π§ GraemeH (
Recruit)
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Thanks Geoff and MTurpin,
Yes I did feel like the 2822 brushless would be a bit overpowered, but thatβs what the manufacturer suggest. Iβve got no experience to base the motor size on, there doesnβt 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, Iβve run many Tamiya cars with their own ESC and 540 Motors, and that only has a heatsink which is fine even when itβs 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? Iβm 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.
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π Sea Nymph build - Motor and ESC
3 years ago by
π¬π§ GraemeH (
Recruit)
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Hello Folks,
Looking for some advice on a Sea Nymph build. I got the SLEC kit as a lockdown project having never built a boat before, though Iβve done a few Tamiya car builds over the years, a fair bit of laser cut wood for railway projects, and many years ago built a couple of rc gliders.
My questions relate to the ESC and motor. The local hobby shop recommended an Overlander Tornado Thumper motor and ZTW Shark ESC, but the ESC needs water cooling. The aft end of the boat is tiny, and doesnβt seem to have the space to accommodate prop, scoop and rudder. The prop and rudder shown on the plans are far smaller than SLEC recommend, and the plans have nothing at all for servo layout.
Any suggestions for an ESC that may not need cooling? Or maybe an oversized Shark like the 50A? Alternatively, any issues fitting the water scoop offset from the centreline?
Would a brushed setup be an easier choice as the Mtroniks ESCs donβt seem to need cooling? If so, would an MFA RE385 running on 3S LiPo be adequate for the 35mm 2 blade prop? (SLEC suggest a 2822 1000Kv brushless on 2-3S)
Although Iβm fairly pleased with progress to date, to be honest the model needs a lot more βfettlingβ than I expected from a laser cut kit, with a lot of the parts having a poor mechanical fit. For example the hull sheets arenβt laser cut at all, not even to a rough shape, and the decking doesnβt fit the cabin profile. Iβm sure a proper craftsman would do an excellent job from just the plans, but I went for a laser cut kit as Iβm aware of my limitations!
Thanks for any help.
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