5 lb Thrust Pulse Jet Engine with Dyna Jet Red Head.

Pulse Jet with Dyna Jet Red Head running on Propane produces 5 lbs of thrust on the test stand. I used the German V1 research data to design the combustion chamber, cone and tail pipe of this engine. I used college research date written by 3 different students in 3 different colleges to make other changes. Research data says, a longer tail pipe produces more kenetic energy causing the engine to take in a larger volume in air and fuel and this will increase the thrust. I ran the engine several times on propane and made several changes to the fuel orfice. Then I took this video which is probably the 8th or 9th test run. This engine is 50% throttable and it is running amost full power for about 2 minutes in the video then. I turned down the fuel pressure until the engine stopped. The original Dyna Jet Head and reed valves were used in the engine. Total run time so far about 60 minutes. The engine is running on propane which produced about 97% of the power of gasoline but propane is a lot easier to regulate. The best part about this design is the lower combustion chamber compression ratio does very little damage to the reed valves. The German pulse jet design is not suppose to produce more thrust it increases the reed valve life to a minimum of 1 hour. Some of the German reed valves lasted for 24 hrs in a static test run. The longer tail pipe also helps to suck the combustion chamber flame away from the reed valves to keep them from getting hot. The engine is running on 8 lbs of propane and can be throttled from 5 lbs to 10 lbs. 10 lbs is the pressure it will need in flight 200 mph ram air will make it run with the correct air fuel mixture. If I increase the fuel orfice diameter the engine will run on less fuel pressure. If I double the area of the fuel jet the engine will run on 4 psi and if I double the fuel jet size again the engine will run on 2 psi propane. It runs on gasoline and alcohol too.

Duration : 0:2:55

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