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Pulse-Jet Engines 
By:  Mike , Jerry , Jonathan

History of the Pulse Jet Engine The pulse jet engine has been used and experimented by many people, since the start of World War I.  The Germans used the pulse jet engine for their V-1 rocket. The V-1 was powered by a 109-014 pulsejet impulse duct, the V-1. They nicknamed it the "Buzz Bomb".  The V-1 rocket was given just enough fuel to make it to its target, where it would run out of fuel and fall on the city. The v-1 rocket could reach speeds of 400 mph and almost 500 mph when falling to its target with a range of just over 200 miles. When it flew it made a loud buzzing sound hence its name. When the buzz fell it was totally silent, they knew that the bomb was falling and some would surely die.  With growing environmental awareness, the quest for fuel-efficient and low-emission engines is gaining interest. The valueless detonation pulsejet engine was designed to meet both of this 21st Century  propulsion requirements. The innovation in this engine is the use of supersonic shock wave resonance to efficiently achieve high compression ratios and propulsion efficiency while recirculating combustion products inside the combustion chamber to reduce NOx emissions. This engine can be used in subsonic flight as an alternative to conventional pulsejet and turbojet engines. This engine falls in a category between lightweight, low-thrust engines used for aircraft modeling And heavy, robust, industrial-grade engines used for commercial and military airplanes. It also Constitutes an efficient alternative to both these types of engines, as it combines the best in each, Providing continuous thrust for long-range subsonic flight. Whereas in conventional designs, Practical energy-mass transfer rates can be obtained only with significant thermal losses, the design described above permits this transfer via the acceleration of air (not participating in combustion) due to the pressure of expanding combustion products. As a result of the increased overall efficiency of the proposed design, the thrust specific fuel consumption should be at least 40% less than that of Turbojet engines. Compression ratios under optimal regimes are estimated at 60:1, and effective thrust at 60kN, which is remarkable for such a small footprint. Possible applications include Commercial Airplanes as well as vertical and hovering propulsion crafts. Its small form-factor will sllow for convenient inclusion in current aerodynamic designs such as wings or ailerons on airplanes for use as wing-tip stabilizers and attitude controllers. Its ability to burn a lean fuel-air mixture, and to recirculate combustion products within the combustion chamber, result in a significant reduction in pollution emissions. Additionally, low exhaust temperatures (due to dilution by mixing with ambient air) and absence of concentrated temperature spots (due to natural jet spreading) dramatically uppresses exhaust plume signatures. The innovative combustion chamber design allows the engine to be integrated at the wing tip or in the ailerons.

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This the coil that we used in our pulsejet experiment.  The picture might look a little wrinkled but its not.  We had some fun with some graphics

This is the pulsejet engine.  The length of the engine is 22 1/2".  The length and diameter of the small part of the engine is 15" and 1 1/2" dia.  The length and diameter of the big part of the engine is 7 1/2" and 2 1/2" dia.

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Conclusion:
         While testing are pulsejet engine we had some fun and I'm sure people lost there hearing.  The pulsejet has about 4 to 5 lb thrust.  Which is very good for the size of the engine.  The engine starts turning red in about 7 secs.  The longest we ran the engine was about 25 to 30 secs.  At the moment we are trying to get put the video on the webpage.  So you can see are wonderful puslejet engine.