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| Roots compressor |
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Type of compressor very typical in aviation engines. It is a blade type compressor (curved blades). made up of two sectional rotors in a figure eight that rotate synchronized inside a chamber. The blades take in air from one side of the chamber and they push it to the other side of the chamber. The main problem is the difficulty to make the system airtight.
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| Rotary engine |
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Also known as Wankel engine. in honour of the inventor that created it in 1954. It is an internal combustion engine but a revolving one. instead of alternating. Mazda is one of the few companies to use it. Its operation is based on the turning of a rotor with three slightly convex eqaul sides. The rotor that is located inside a special case with three different chambers. rotates by means of an eccentric system on an axis that is reponsible for picking up the force of the explosions. The volume between the rotor and the chambers varies as it rotates. One of the chambers is used for admission while the volume between one side of the rotor and the case increases. Then it leaves the admission chamber whilst the volume drops and the mixture is compressed. In the next chamber the compression ends and the spark appears. then there is the combustion and the expansion of the gases. The rotor continues to rotate and then it arrives at the exhaust chamber where the the burnt gases are expelled. This whole cycle is carried out simultaneously on the other two sides of the rotor. The advantage of these engines is its low weight. Of the problems associated with them. it is worth pointing out that there is lack of hermetic tightness between the rotor and the case.
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| RPM |
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Initials for revolutions per minute. The speed of rotation of an engine is expressed in revolutions per minute. The tachometer (or it turn counter) is the instrument that indicates us how many turns the crankshaft is doing in one minute.
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