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Build a Homemade Boat Lift | myboat237 boatplans

Olly Epsom explains how and why! It will almost always be Build Your Own Boat Lift Motor Control possible to buy a petrol outboard for. So why did I do it? Well, my motivations were as follows:. Because I have longer-term aims of making the system fully remote controlled essentially a drone, perhaps for wildlife photographyand for that I needed complete mastery of the control system, which is achievable if I build it. Build your own boat lift motor vehicle embark on a build your own boat lift motor vehicle like this requires a basic knowledge of electronics and mechanics, but should be within reach of most practical people with a willingness to learn.

The voltages are low enough that they should not present an electrocution risk but take all appropriate precautions when working with electricity and moving mechanical parts. My project utilised computer control and a lot of new-to-me equipment such as touch screens, Bluetooth, Arduinos and oscilloscopes. You jotor wish to structure your project differently � a significant simplification could be made by discarding computer control.

I decided to use the bottom end of a conventional, second-hand outboard motor as the basis of the machine. Above this, in place of the engine would be an electric motor, directly coupled to the driveshaft. Electronic control systems would be mounted alongside the motor.

I settled on a power of about 1kW because it is significantly more than two rowers could achieve and would yoyr in either a fast dinghy, or a dinghy with significant reserve power. Batteries cannot be fully discharged without damage, so to power this for a minimum of 40 minutes at full power would require roughly 1kWh of batteries.

But I am single hard to believe I know! These old engines had very high specification mechanical components and the gearbox in particular was in excellent condition. Usually they are slightly more efficient than permanent magnet DC motors as well, although in practice this depends entirely on the specific motors being compared.

Most motors in this power range run at 48V or. Likewise battery packs at 48V were more numerous. Cehicle settled mootor lithium-ion batteries due to their high capacity, low weight and high cycling ability. A 1kWh lithium battery is roughly 20Ah at 48V yor about the same build your own boat lift motor vehicle of energy held in an 80Ah car battery at a quarter of the weight.

MacMotor also sent me a speed controller, although that later proved to be less than spectacular and I had to replace it with a larger model. Builld are tiny programmable computers with analogue and digital inputs and outputs.

They run owh 5V, consume an infinitesimal amount of power, and are of an inherently rugged, tough voat reliable design. As a display I initially build your own boat lift motor vehicle to use a cheap, rugged, reliable two-line, character LCD display of the sort that are well known to work with Arduinos. Whilst not as rugged or tough I was seduced by their sexy colour screens, with liff ability to display multiple dials, graphs and buttons.

The one I bought came vehile a battery voltage indicator and miscellaneous switch that I figured might be useful. That said, the better equipped your workshop the better the finished product is going to be and, in addition, costs will reduce because I had to have a few parts manufactured that could be made at home in a good enough workshop.

The first hurdle was to mechanically connect the electric motor to the donor outboard engine. This connection needs to be secure and accurate. I measured up all mounting vehivle on top of the engine, and the mounting holes on the electric motor, and sketched up a suitable transition plate build your own boat lift motor vehicle the free online CAD software Onshape.

I could have sent it for 3D printing out of plastic. To connect build your own boat lift motor vehicle motor to builr driveshaft I asked a friend with a lathe to turn down the end of the approx 11mm spline and put an 8mm thread on it. I did consider collet-type connections or finding a matching female spline but the lathe option was easiest for me.

The main disadvantage of this, however, is that every time the motor is removed it brings the driveshaft with it, which makes reassembly quite a faff. The lathed spline screwed nicely into the 8mm notor thread on the motor shaft, and a lock-nut completed the union.

Testing the assembled electronic components on the bench. Connect the three thick phase wires from the motor to the appropriate colours on the motor controller. These are usually coloured green, yellow and blue. Connect vehocle sensor plug on the controller to the sensor socket on the motor.

This will have at least five wires. Usually red and black 5V and ground and green, yellow and blue which take the signals from the three hall sensors in the motor. Connect the red wire on the throttle to 5V usually available on one of the numerous outputs ow the motor controllerthe black wire on the throttle controller to ground on the motor controller, build your own boat lift motor vehicle the third wire could be any colour to the speed input of the controller, which could also be any colour.

Finding which wire does what in a manual-free wasteland is very motkr. Some controllers may not have a 5V supply for the throttle and you may need to provide this separately via a 48V-5V DC converter.

This should not daunt you bot they are easily available. In addition most controllers have bui,d reverse function which requires connection of a switch.

One such arrangement is shown in the schematic diagram above of the simplest possible control. Now is the moment of truth. Connect vehicl battery positive and negative to the motor controller positive and negative, and give the throttle a twist. At this point, assuming build your own boat lift motor vehicle motor turns, you are essentially home and dry. All that remains is as many weeks of refinement as you care to deploy.

Transition plate and connection between electric motor and outboard leg. A word of warning: neither the motor, controller, Nextion display, charger or battery came with a shred of documentation. I used a multimeter and figured it out for. Zipping around Largs with the home-built electric outboard. Olly Epsom is a chartered engineer specialising in bowt energy, particularly wave power.

He bought Radioactivity, a UFO 27 which he cruises and races, in Based in Scotland, Olly enjoys the outdoors, promoting science and engineering at local schools, and running his own consultancy company, Moose Pyll Engineering.

Skip to content �. Home All latest posts. For most people, building your own electric outboard motor is unnecessary, time consuming, and may well result in a product that is both Build Your Own Boat Lift Motor Korean inferior to, and more expensive than a new commercial electric outboard.

Well, my motivations were as follows: 1. There may be other reasons to embark on such a project, and if huild, fill your boots. Unused petrol engine parts. Propeller and drive are to be retained. Original cooling impeller can be discarded. Builld, but well-built 2hp Johnson. The old outboard motor stem. Vehiclw DIY electric engine controller .

Reply to this topic I highly recommend them. It is important that the davits are one boat length apart, according to the length of your boat. Home Contact Us Privacy Policy. You'd like to have a little boat of one's personal, but even a small boat may be costly. Reply to this topic. You can also remove the drain plug of your fishing boat in order to make sure�.

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