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>> Home > Tags > water cooled

water cooled
motor cooler
cooling
interchangeable
36 rater model yacht
ahc waterson b444
blackwater
salt water
water jacket
water line
water proofing
water pump
waterline
waterproof
water cooled
Fitting the rubbing strakes. by robbob Fleet Admiral!   Posted: 12 days ago
Before I can apply the final coats of epoxy on the hull I need to fit the two rubbing strakes. I started with the bottom rubbing strake which runs along the chine where the side skins and bottom skins meet. The strakes meet the external keel at the bow and also extend across the stern. I used a length of square section of obeche which needed a gentle curve towards the bow, rather than steam the wood I soaked it in water for a few minutes to soften it and then used a heat gun while bending the strip gently to the required curve. When the wood had cooled and dried the bend was set I did a test fit and drilled very fine holes through the strip so that the modelling pins I use to hold the piece in place would not split the wood. A 30 minute epoxy was used to fit the strakes on both sides of the hull and stern. Above this bottom strake is a second rubbing strake and this also meets the keel at the bow and runs across the stern, I used a broader and thinner obeche strip for this and it was prepared and fixed in the same way. The final pieces to fit will be the gunwales which run around the hull where the sides meet the deck but I will not fit them until I have planked the deck.

Cooling coil by ChrisF Lieutenant   Posted: 20 days ago
An outrunner is better for this type of boat as it is more torquey. If cooling is needed (and it may not) just use a proper water cooled motor mount. Chris

Vosper by Joe727 Admiral   Posted: 20 days ago
Extremely impressive, a water-cooled four stroke with reverse. You must have some great metal working abilities and nice equipment. Video was fun to watch! Joe

All hooked up, nowt happens... by jbkiwi Commander   Posted: 26 days ago
Hi Steve, I have the same problem with the ESCs in my HSL. They are cheap Chinese car models and can be a bit tricky to get into reverse quickly. I have found that either waiting a few seconds in neutral before trying reverse, or going to neutral and flicking the throttle forward a few clicks and back to neutral quickly (in .5 sec) usually sorts it. I think it may be that the motor stops somewhere that the cheaper ESCs can't detect (bit like an old car starter that hits the bald spot on the ring gear and you have to jog it a bit) so you have to move it slightly for it to 'see' it (maybe the capacitors also). Brushed ESCs don't have that problem as the brushes are in constant contact, rather than relying on correct positioning in Brushless motors. You will also find that some Chinese motors are not timed/wound correctly, and you can feel weak or 'floaty' spots between certain magnets which may also cause a problem. Perhaps trying a higher or lower ESC timing by 1 step either way might help if you have that capability. If it works by just flicking the throttle method, you can just slow down as you come in and take you time finding reverse in a scale like manner (remember the PT109 movie where they went through the shed on the wharf) You can also try swapping the other pairs of wires on the motor (same direction but different pairs). If you are still not happy then it might be time as Doug said, for a better ESC with instructions. Get one which has all the programing features, (fwd, rev , timing, auto batt detection (lipos or NmH etc) starting mode- ie soft,hard, brake etc) this will give you plenty of options for adjustment. Doesn't have to be a marine one, a good known brand car/buggy one will do and if you have any heat problems you can always put a mini fan on it. Water cooled marine ESCs are really only for high amp high speed setups. My 36"HSL has 2x 30A car ESCs running 2x 28/45 2000kv water cooled motors and ESCs never get even warm. Pictured are the ESCs I am using from HK which have an output plug for a fan if needs be. The 3rd pic is the brushed ESC types (EBay, AliExpress) I am using, which have no problems with reverse transition (see vid section re Thornycroft MTB maneuvering) also the HSL vids to give you an idea of how these brushless ESCs perform even with the minor reversing problem. Hope you get it sorted.

skytech H101 by keithtindley Lieutenant   Posted: 27 days ago
[Score: 8/10] 18"/500g skytech H101 Capable of 0mph and a runtime of 15mins Single Propellor (3 Blade 20mm) Direct Drive to a 380 water cooled (3 Blade) Powered by LiPoly (7.4v) 1Amp/h Batteries - Comments: skytech racing boat with water cooled engine.lts capable of 18 knots ! it has a self righting function and came with a spare battery pack,prop,oil and spanner. hope to have some fun with my grandson.

Cooling coil by ChrisF Lieutenant   Posted: 28 days ago
Yes, that is what was thinking. Normally with brushless motors it is the motor mount that is water cooled which draws the heat out of the motor. It may not need cooling anyway.

New bits by steve-d Commander   Posted: 1 month ago
Right, just been given some nice bits. Brushless outrunner FUSION 3535/05 1500kv ESC Top Edge 60A water cooled SC060B Plus a coupling. So now to go shopping. Which make of Lipo3 and from where? What type and size of brass prop? Where to buy silicon wires and the fancy gold terminals? Steve

Vosper by Biscuit Sub-Lieutenant   Posted: 3 months ago
Well this started off brushless but it had no soul or character, I bought an Os 40 fourstroke and converted it to be water cooled, I then made my own reverse gearbox and clutch assembly and fitted a water pump so the engine will keep cool while stationary. It has nav lights and a working searchlight that I can move while running.

20th Scale ELCO 80ft PT boat part 9 by jbkiwi Commander   Posted: 4 months ago
I would check out the water cooled back plates for the out- runners as they will possibly run real hot if at all loaded up without cooling, unless you have fans like aircraft propellers (even then and in open air they still get hot!) I would look at this seriously to avoid cooking your motors. Hobby King usually has various cooling parts, or EBay, Aliexpress, Banggood etc. Bit late now I suppose, but water cooled in-runners (around 2000kv 28mm diam) are a better idea for boats. You can buy in-runners and water jackets to fit them as I did but they need flushing after use with CRC or similar to avoid rust, (I'll be copper tube wrapping the next lot, then there are no worries)

ASR 64ft R/C VID 2 by jbkiwi Commander   Posted: 4 months ago
Boat is Scratch built 36" British Power Boat 64ft High Speed ASR Launch which belonged to the RNZAF. The launch was one of the 22 built and was shipped to NZ in 1940. It was the only one of its type in the Southern Hemisphere. Model has twin motors, ESCs, sound units etc. Has remotely switched water pump for water cooled brushless 2000kv in runner motors and remotely switched lighting. Uses 2x 2200mah 2s LiPos for drive and 1 1800mah LiPo for the pump (also a separate battery for the LED lights. Boat is built with strip planked balsa on ply frame and fiber glassed. Deck is ply, wheelhouse is varnished balsa. The colour is as it was for most of its time in the RNZAF . Took about 5 years on and off to build and finished it last year. (please ignore the time date - can't get rid of it .

EarlyVosper M.T.B by Simplas by boaty Admiral   Posted: 4 months ago
Hi Onetenor Fuji 15 was a good glow engine which I don't think it is manufactured any more. Aero version max B.H.P was just below .40 when tested. If it was in a model aircraft it would have been around .20 to .25 depending on prop size which was good then for a small capacity glowplug . Marine versions when on the water put out a little less and the water cooled jacket was never as efficient as the finned cylinder jacket of the aero version. My two Aerokits boats, the Sea Commander and the Crash Tender are powered by single Speed 600 motors running on either 8.4 or 9.6 volt Ni Mh batteries. Performance is equal to that of marine diesel power such as the 2.46 Ed Racer and D.C 2.46 Rapier, the latter I used to watch in the fast steering events in the early 1960s at Fleetwood and Coronation Park in Crosby just outside Liverpool. Taycol powered versions would be obviously slower due to the additional weight were far more reliable and you did not have to put up with injuries from excessive use of a starting cord with kids watching and "extracting the urine" shouting "why wont it go mister". Boaty

S.H.Grainger Formula Powerboat by vortex Sub-Lieutenant   Posted: 4 months ago
Hi Steve im not sure now regarding motors as they have water cooling cans on but Surfury runs from memory a 1075kva motor Turnigy 160 A speedo watercooled on 2x2s 5200 lipo`s in series ie 14.4volts with 52mm mocom Alum prop approx 3hp. I think the Tornado has approx 2045kva motor same speedo + lipo`s x 50mm nylon prop both do scale speed to as fast as 40/61 IC and look great on our choppy water with just prop and rudder in the water. Both motors will take 6s if you like ballistic? All gear from Hobby king. Try the IC first, post some pics please

Painted outside by CB90 Fleet Admiral!   Posted: 5 months ago
Finish painting and adding some stickers, and a couple of pictures of the real thing. Fitted Motor in a water cooled jacket and motor mount. The motor is a 3650 and is rated as 3060kv Max Power: 1300W Max Voltage: 19V Max Amps: 68A Shaft Diameter: 3.2mm Shaft Length: 15mm Connector: 5.0mm Banana Connector Net Weight: 181g Servo fitted sideways via rubber bellows to external rudder fixed to transom.

Lifeboat plans by Westquay Fleet Admiral!   Posted: 6 months ago
Spitfires in this case are kneeler o/b powered vintage race boats. I thought I had 2 on the go, one for me and one for someone else, but I just found one! Oh well, one's enough. The dollies are needed to look like they're driving these things. They accept 1/6th scale dollies and I even have a suit of clothes bought off ebay for him! I bought an outboard motor from Hobbyking without fitted motor for bugger all, but now see that the same thing is £45 quid without brushless, which needs to be a 28mm watercooled inrunner. I'm going to need one of the those to fit the shaft and all that, but can only find one for 31 quid. It seems HK have been upping their prices lately! Do you have any reccomendations for where to get such an animal a little cheaper? I need the motor, I now realise, to build the dummy Godiva casing round it. It's supposed to be around 2300Kv, but the only ones HK have are more. Is that very important? Martin

Spektrum, new, useless... by Westquay Fleet Admiral!   Posted: 7 months ago
As reported elsewhere, I have today received the FlySky RC set and it works...perfectly.....straight outa the box as it's PRE-BOUND! And my dear bride has let me have it before my birthday. Although I still have to wait for the Crash Tender Yeoman fittings kit! I would like to use something old in the Crash Tender as it is old itself, so I guess I'd better have a look at your circuit diagrams Doug,as far as suppression and even ESCs are concerned. I have found 3 ESCs today. One I knew of and 2, WITH their instruction in best Chenglish that I had no memory of! Water -cooled too! I'll send you a photo of them. Cheers, Martin