29.07.2020  Author: admin   Alum Boats For Sale
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Olly Epsom explains how and why! It will almost always be 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. 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 emajls. My project utilised computer control and a lot of new-to-me equipment such as touch screens, Emailss, Arduinos and oscilloscopes. You may wish to structure your project differently � a significant simplification could be made buile 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 ro 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 how to build your own boat motor emails 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 how to build your own boat motor emails 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. 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, although that later proved to be less than spectacular and I had to replace it with a osn model. Arduinos are tiny 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 I 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 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 yor 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 it for 3D printing out of plastic. To connect the motor to the 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 female thread on the motor shaft, and a lock-nut completed the union. Testing the assembled electronic components onw 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 the emials plug on the controller to the sensor socket on the motor. This will have at least five wires.

Usually red and black 5V and bot and green, yellow and blue which take the signals from the three hall sensors in the motor.

Connect the red wire how to build your own boat motor emails the throttle to 5V usually available on one of the numerous outputs hoow the motor controller how to build your own boat motor emails, the 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, which could also be any colour.

Finding which wire does what in a manual-free wasteland is very challenging. 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 as emaila are easily available. In addition most controllers have a reverse function which requires connection of how to build your own boat motor emails switch. One such arrangement 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 point, 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 electric motor and outboard leg.

A word of warning: neither the motor, controller, Nextion display, charger or battery came how to build your own boat motor emails a shred of documentation. I used a multimeter and how to build your own boat motor emails it out for. Zipping around Largs with the home-built electric outboard. Olly Epsom is a chartered engineer specialising in renewable energy, particularly wave power. He bought Radioactivity, a UFO buildd 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 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 .

Main points:

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You will want to cut this opening so that the mailbox fits very tight and you are barely able to push it into the motor. Boat Motor Mailbox Finishing Touches : After you cut the opening for your mailbox into the front of the boat motor and adjust for fit, you will want to use a good glue on the bottom of the front of the standard mailbox.

This will keep it from sliding or moving. Use very small drops of glue across the bottom front edge of your mailbox and slide it into place. Press firmly on it so that it gets a good seal. You can use any good glue you like, but i found a great deal on glue by shopping for it here.

You will now want to paint your boat motor mailbox so that everything matches and looks finished. You will also want to paint a name or address on both sides of the motor. You may need to also paint something on the front of the motor depending on what area you live in. The first thing you need to do is mount your mailbox on to the strong metal bar.

You will then need to mount the bar on to the wood post you intend to use. Be sure to use strong metal fittings to mount your motor mailbox so that it stands up during turbulent weather.

When your boat motor mailbox is ready to be set in place, it is time to dig a hole. Dig your hole at least three to four feet deep and slightly larger than the post you are using.

You will need to mix and pour your concrete in to the hole and let it get firm before sliding your post and mailbox into place. Bring a magnet close to the coil. Once a current is flowing through the coil, it can interact with a magnet. Either hold the magnet close to the coil, or tape it to the battery right underneath the coil. The closer the magnet is to the coil the stronger it will interact.

Spin the coil. See what happens when you spin the coil. Depending on the direction the current is flowing and the side of the magnet that is interacting with the coil, the coil may continue to spin or may not. If the coil does not keep spinning, try spinning the other direction.

Experiment with different methods. Different variations will give you different results. The coil may spin faster, slower, or not at all if you change something. Try moving the magnet closer to or further from the coil, pick a stronger or weaker magnet, or use the other side of the magnet. These variations are a fun way to understand the forces in an electric motor. The article is actually referring to sandpaper.

You use sandpaper because the wire used for making the coil is enameled copper wire, which means the copper wire has an insulation coating.

To ensure that there is proper contact between the coil end and the battery lead, you need to remove this enamel coating. So you use sandpaper to rub it off. Not Helpful 34 Helpful Other than a learning experience, not much. This motor is fairly weak, and won't generate enough power to move anything.

It will make a great science fair project, however. Not Helpful 39 Helpful Electric motors have many uses. Motors which are used in simple circuits help in giving a better understanding of electricity, motion and technology to the students. Large motors used in cars or locomotives help in motion. Motors are a key component of the industrial world and the technological advances we are all familiar with today.

What adjustments do I make if it doesn't rotate but instead the wires heat up? Since it isn't turning, I would avoid decreasing the power. Try a thicker wire.

Not Helpful 15 Helpful In short, the current moving through the wire generates a magnetic field. This field interacts with the magnet that you introduce. Not Helpful 20 Helpful In general, the number of turns affects the torque and speed of the motor. If the number of turns increases, the motor will become slower slow speed , but have more torque - application for heavier weights. If the number of turns decreases, the motor will become faster fast speed , but have less torque - application for lighter weights.

Not Helpful 27 Helpful The principles are the same as the basic electric motor. A larger engine is used to generate more power through rotation and that power is transferred to the wheels via the driveshaft. Not Helpful 18 Helpful Abhishek Verma. Yes, you can use a thin wire, but this will increase the resistance as resistance is inversely proportional to the area of cross-section of the wire.

Electricity consumption will consequently increase. Not Helpful 2 Helpful 5. Copper wires can be insulated easily and current can pass easily from them.

You can get copper wires from a hardware store. Not Helpful 2 Helpful 8. I recommend using some insulated 22G wire, but any type of wire should work. Not Helpful 2 Helpful 4. Include your email address to get a message when this question is answered. Check out The Gatherings Here! Our Boats In Action! Boatbuilding Methods. Check out these boatbuilding methods here. Boatbuilder's Blog. Check out the Boatbuilder's Blog here.

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