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running pulse - translation to arabic
![[[Argus As 014]] pulsejet engine of a V-1 flying bomb at the [[Royal Air Force Museum London]]](https://commons.wikimedia.org/wiki/Special:FilePath/Argus As14 RAFM.jpg?width=200 "[[Argus As 014]] pulsejet engine of a V-1 flying bomb at the [[Royal Air Force Museum London]]")
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![Maximum human speed [km/h] and pace [min/km] per distance](https://commons.wikimedia.org/wiki/Special:FilePath/Human speed distance portrait.png?width=200 "Maximum human speed [km/h] and pace [min/km] per distance")
![A scene depicting long-distance runners, originally found on a [[Panathenaic amphora]] from Ancient Greece, circa 333 BCE](https://commons.wikimedia.org/wiki/Special:FilePath/Long Distance Runners, Ancient Greece, Amphora.png?width=200 "A scene depicting long-distance runners, originally found on a [[Panathenaic amphora]] from Ancient Greece, circa 333 BCE")
![[[Eadweard Muybridge]] photo sequence](https://commons.wikimedia.org/wiki/Special:FilePath/Muybridge runner.jpg?width=200 "[[Eadweard Muybridge]] photo sequence")
![Roman bronze sculptures]] of runners from the [[Villa of the Papyri]] at [[Herculaneum]], now in the [[Naples National Archaeological Museum]]](https://commons.wikimedia.org/wiki/Special:FilePath/Runners MAN Napoli Inv5626-7 n02.jpg?width=200 "Roman bronze sculptures]] of runners from the [[Villa of the Papyri]] at [[Herculaneum]], now in the [[Naples National Archaeological Museum]]")
![International-level women athletes competing in 100 m sprint race at [[ISTAF Berlin]], 2006](https://commons.wikimedia.org/wiki/Special:FilePath/Sina Schielke (192) wins the 100 metres race - ISTAF 2006 - Berlin, 3 September.jpg?width=200 "International-level women athletes competing in 100 m sprint race at [[ISTAF Berlin]], 2006")
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Wikipedia
A pulsejet engine (or pulse jet) is a type of jet engine in which combustion occurs in pulses. A pulsejet engine can be made with few or no moving parts, and is capable of running statically (i.e. it does not need to have air forced into its inlet, typically by forward motion). The best known example may be the Argus As 109-014 used to propel Nazi Germany's V-1 flying bomb.
Pulsejet engines are a lightweight form of jet propulsion, but usually have a poor compression ratio, and hence give a low specific impulse.
There are two main types of pulsejet engines, both of which use resonant combustion and harness the expanding combustion products to form a pulsating exhaust jet that produces thrust intermittently. The first is known as a valved or traditional pulsejet and it has a set of one-way valves through which the incoming air passes. When the air-fuel is ignited, these valves slam shut, which means that the hot gases can only leave through the engine's tailpipe, thus creating forward thrust. The second type of pulsejet is known as the valveless pulsejet. Technically the term for this engine is the acoustic-type pulsejet, or aerodynamically valved pulsejet.
One notable line of research of pulsejet engines includes the pulse detonation engine, which involves repeated detonations in the engine, and which can potentially give high compression and reasonably good efficiency.
