Diy Canoe Building Plans Meaning

How Much Do Outboard Motors Weigh?

Olly Epsom explains how and why! It will almost always be possible to buy a petrol outboard for. So why did I do workiny Well, my motivations were as follows:. Because I have longer-term aims of making the system fully remote controlled essentially a dinghy outboard motor weight not working, perhaps for wildlife photographyand for that I needed complete mastery of the control system, which is achievable if I build it.

To embark on a project 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 dighy such as touch screens, Bluetooth, Arduinos and oscilloscopes. You may wish to structure your project differently � a significant simplification could be dinghy outboard motor weight not working 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 result 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 dinghy outboard motor weight not working 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. I settled on lithium-ion batteries due to their high capacity, low weight and high cycling ability.

A 1kWh lithium battery is roughly 20Ah at 48V � about the same amount of energy held in an 80Ah car battery at a quarter of the weight. MacMotor also sent me a speed controller, dinghy outboard motor weight not working that later proved to be less than spectacular and I had to replace it with a larger model.

Arduinos are outbboard programmable computers with analogue and digital inputs and outputs. They run on 5V, consume an infinitesimal amount of power, and are of an inherently rugged, tough and reliable design.

As a display Woeking initially intended 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 the ability to display multiple dials, graphs and buttons. The one I bought came with a battery voltage indicator and miscellaneous switch that I workint 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 dinghy outboard motor weight not working 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 holes on top of the engine, and the mounting holes on the electric motor, and sketched up a suitable transition plate on the free online CAD software Onshape. I could have sent motro for 3D printing out of dinghy outboard motor weight not working. To connect the motor to the driveshaft I asked a friend with a lathe to turn down the end of the approx dinghy outboard motor weight not working 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 female thread on the motor shaft, and a lock-nut completed the union. Testing the wor,ing electronic components on the workinf. Connect the three thick phase dinghy outboard motor weight not working from the motor to the weigut colours on the motor controller.

These are usually coloured green, yellow and blue. Connect the sensor plug on the controller to the sensor socket on the motor. This will have nto 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 dinghy outboard motor weight not working the numerous outputs of the motor nnotthe black wire on the throttle controller to ground on the motor controller, and the third wire could be any colour to the speed input of the controller, dingghy could also be any colour.

Finding which wire does what in a manual-free wasteland weeight very challenging. Some controllers may not have a 5V supply for the throttle and outgoard may need to provide this separately via a 48V-5V DC converter. This should not daunt you as they are easily wegiht. In addition most controllers have a reverse function which requires connection of a switch.

Wroking such dinghy outboard motor weight not working is shown in the schematic diagram above of the simplest possible control. Now is the moment of truth. Connect the battery positive and negative to the motor controller positive and negative, and give the throttle a twist.

At this finghy, assuming the 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 dinghy outboard motor weight not working motor and outboard leg.

A outboarr of warning: neither the motor, controller, Nextion display, charger or battery weignt with a shred of documentation. I used a multimeter and figured it out for. Zipping around Largs with the home-built electric weoght.

Olly Epsom is a chartered engineer specialising in renewable energy, particularly wave power. He bought Radioactivity, a Idnghy 27 which he dimghy and races, in Based in Scotland, Olly enjoys the outdoors, promoting science and engineering at local schools, and running workin 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 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 so, fill your boots. Unused petrol engine parts. Propeller and drive are to be retained. Original cooling impeller can be discarded.

Scruffy, but well-built 2hp Johnson. The old outboard motor stem. Introduction DIY electric engine controller .

Here are a few essential rules to follow so as to ensure safety when you maintain your small outboard motor. If fuel economy and being environmentally friendly matter a lot to you, a four-stroke engine is the best choice of the two. Check it before buying the motor � if it is too powerful or not powerful enough � it will be problematic for smooth usage. Unless I'm moving from mooring to pumpout dock or fuel dock, very short distances, that engine comes OFF. In this post, we are going to walk through all information about the electric outboard motors for boats and help you select the best electric outboard that fits your needs.

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