Operating Principles of Turbine Engines

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Operating principles of reciprocating and turbine engines
Robert Zimmerman
Embry Riddle

Operating principles of reciprocating and turbine engines.

Many airplanes are equipped with reciprocating engines. This is due to their reciprocating or back and forth movement of the pistons. Two kinds of these motors are. 1. by cylinder arrangement with respect to the crankshaft—radial, in-line, v-type or opposed, or 2. By the method of cooling—liquid or air-cooled.
The main advantage of a radial engine is the favorable power-to-weight ratio.

V-type engines usually have more horsepower than in-line engines. The horizontally-opposed engine is the most popular engine on smaller aircraft.

Opposed engines always have a even number of cylinders. Most are air cooled and have a high power-to-weight ratio due to a light crankcase.

The main parts of a reciprocating engine include the cylinders, crankcase, and accessory housing. The intake/exhaust valves, spark plugs, and pistons are located in the cylinders. The crankshaft and connecting rods are located in the crankcase. The magnetos are normally located on the engine accessory housing.

Operating Principles

Federal Aviation Administration. (2013, July 1) found the basic principle for reciprocating engines involves the conversion of chemical energy, in the form of fuel, into mechanical energy. This occurs within the cylinders of the engine through a process known as the four-stroke operating cycle. These strokes are called intake, compression, power, and exhaust.

1. The intake stroke begins as the piston starts its downward travel. When this happens, the intake valve opens and the fuel/air mixture is drawn into the cylinder. 2. The compression stroke begins when the intake valve closes and the piston starts moving back to the top of the cylinder. This phase of the cycle is used to…...

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