Report 3: Internal Combustion Engines and Boat Propulsion.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 power head, 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 gasses 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. a. In an Internal Combustion System, the piston is moved by expanding combusting 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.b. The connecting rod connects the piston to the Crank Shaft and forms a system that is dedicated to turning linear motion into rotating motion.c. The Crank shaft is rotated by the piston and the connecting rod and serves as the area that powers the propeller.d. 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.e. 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.f. The Gas Exhaust sees the exit of exhaust gasses mainly by the cylinder through exhaust valves, which can be configured with the exhaust manifold or an exhaust header.

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