Electric outboard engines are remote powered, and are hailed for being good for the environment as well as being cost-efficient in the sense that they are cheaper to maintain. Recently developed versions of this outboard are powered with DC motors in the powerhead, much like that of a petrol engine. These can also work at higher specific speeds while the propeller can work at lower speeds for efficiency.Wind propulsion is the traditional method of small-boat propulsion. It is an alternative to those propulsion methods that emit CO2 gases into the atmosphere. |Two newer styles of wind propulsion come in the forms of kite propulsion, towing kites facilitate the absolute best possible speed for the vessel and are raised only when the wind is right otherwise it will not work effectively, and sail propulsion for merchant ships. In an Internal Combustion System, the piston is moved by expanding combustion gasses, which allows the piston to complete its job of rotating the crankshaft.In an outboard engine, sliding pistons push a crank around which drives a shaft that eventually powers the propeller.The connecting rod connects the piston to the Crankshaft and forms a system that is dedicated to turning linear motion into rotating motion.The Crank shaft is rotated by the piston and the connecting rod and serves as the area that powers the propeller.The Cylinder Head is closed at one end by a large metal plate known as the head and open at the other to allow movement of the connecting rod. The head contains a spark plug on the ignition and valves that control the admittance of air-fuel mixtures and the escape of burned fuel are also located in the cylinder head.The Oil sump feeds the lubrication system that forms the lower engine enclosure where the oil is then taken by the oil pump and passed through a filter.The Gas Exhaust sees the exit of exhaust gases mainly by the cylinder through exhaust valves, which can be configured with the exhaust manifold or an exhaust header.An Air Inlet is an opening on a car or vessel that intakes air for operation and takes it into the combustion chamber to aid the ignition of fuel.In a petrol engine the air mixes with the fuel and is then compressed by pistons and ignited using spark plugs. This is a major difference from the Diesel Engine as these types of engine do the compression first and then inject the fuel.A two stroke engine works in two simple movements, a down stroke and an up stroke. The down stroke begins as the piston moves to allow for air intake into the combustion chamber. The up stroke then occurs as the piston is pushed up, compressing the fuel and air and the spark plug igniting. After the next downstroke the exhaust gases are expelled from the engine.A four stroke engine works similarly, beginning with an intake stroke. An intake stroke sees the downwards motion of the piston to allow for intake of an air-fuel mixture from the intake valve. It then moves to the compression stroke where the piston moves upwards, compressing the mixture in the process.The power stroke comes after as the crankshaft rotates and begins the expansion of the mixture as it is ignited by the spark plug. The exhaust stroke begins as the piston once again moves up allowing the exhaust gases to expel.