Sea Nymph build - Motor and ESC
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- RookysailorSilver
- mturpin013Bronze
Sea Nymph build - Motor and ESC
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.
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.
Liked by Martin555
Sea Nymph build - Motor and ESC
Sorry posted before pics loaded also you might like this ref
http://www.modelboats.co.uk/news/article/but-i-don-t-understand-electronics/18054
Geoff
http://www.modelboats.co.uk/news/article/but-i-don-t-understand-electronics/18054
Geoff
Geoff L.
Sea Nymph build - Motor and ESC
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.
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.
Geoff L.
Sea Nymph build - Motor and ESC
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.
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.
If it looks right it probably is.
Liked by mistyoptic
Sea Nymph build - Motor and ESC
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.
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.
Sea Nymph build - Motor and ESC
Hello, It seems to me that there is a compulsion since the availability of brushless motors to over power cabin cruiser models to get them 'up on the step' and have them sailing at a scale speed of Donald Cambell's Blue bird rather that the sedate Sunday afternoon family boat that they are meant to represent. I have just finished an Aeronaut Diva which is a little bigger than the Sea Nymph which is to be powered by an MFA 380 direct drive to a small prop. I am using a FTX6557W ESC but a Viper 15 would suit equally well. A water cooled ESC should not be required on a boat of this size surely?
Sadly the boat was completed just before this last lockdown set in and I have not had a chance to try it on the water.
By comparison I am now building an HAKITS Morston larger version at 27 inches which will be powered by and MFA meteor 500 with 2 to 1 gearbox and also using a Viper 15 ESC. I hope to be a ble to post a pic of the Diva over the weekend and also begin a building blog on the Morston. HAKITS do a range of wooden boats of around 18 inches and I must say the Morston kit is accurately cut and shaped and is going together well. Best wishes
Geoff. L
Sadly the boat was completed just before this last lockdown set in and I have not had a chance to try it on the water.
By comparison I am now building an HAKITS Morston larger version at 27 inches which will be powered by and MFA meteor 500 with 2 to 1 gearbox and also using a Viper 15 ESC. I hope to be a ble to post a pic of the Diva over the weekend and also begin a building blog on the Morston. HAKITS do a range of wooden boats of around 18 inches and I must say the Morston kit is accurately cut and shaped and is going together well. Best wishes
Geoff. L
Geoff L.
Sea Nymph build - Motor and ESC
I am sure that your local shop has over estimated the requirement for an 18" boat, I would go for a brushed set up with the Mtronics ESC its so simple to set up and your right no water cooling required.
As for "MFA RE385 running on 3S LiPo" I am no expert but the MFA RE 385 seems OK but the lipo suggestion needs some further advice from an electrical/electronics member (Doug)
As for "MFA RE385 running on 3S LiPo" I am no expert but the MFA RE 385 seems OK but the lipo suggestion needs some further advice from an electrical/electronics member (Doug)
Sea Nymph build - Motor and ESC
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 I’ve 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 doesn’t 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 don’t 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 I’m fairly pleased with progress to date, to be honest the model needs a lot more “fettling” than I expected from a laser cut kit, with a lot of the parts having a poor mechanical fit. For example the hull sheets aren’t laser cut at all, not even to a rough shape, and the decking doesn’t fit the cabin profile. I’m sure a proper craftsman would do an excellent job from just the plans, but I went for a laser cut kit as I’m aware of my limitations!
Thanks for any help.
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 I’ve 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 doesn’t 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 don’t 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 I’m fairly pleased with progress to date, to be honest the model needs a lot more “fettling” than I expected from a laser cut kit, with a lot of the parts having a poor mechanical fit. For example the hull sheets aren’t laser cut at all, not even to a rough shape, and the decking doesn’t fit the cabin profile. I’m sure a proper craftsman would do an excellent job from just the plans, but I went for a laser cut kit as I’m aware of my limitations!
Thanks for any help.
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