Gluhareff Pressure Jet

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The Gluhareff Pressure Jet (or tip jet) is a type of

Having no moving parts, the engine works by having a coiled pipe in the combustion chamber that superheats the fuel (propane) before being injected into the air-fuel inlet. In the combustion chamber, the fuel/air mixture ignites and burns, creating thrust as it leaves through the exhaust pipe. Induction and compression of the fuel/air mixture is done both by the pressure of propane as it is injected, along with the sound waves created by combustion acting on the intake stacks.^[2]

The engine has three intake stages, which are sized according to the sound created by the combustion process when running. This has exactly the same effect as the

A 1949 reference to a very similar concept exists.[4] Although described as a ram jet, this version heats the fuel within a closed space to create the pressure for injection and compression of the entrained air in a similar manner to the Gluhareff design and is in all fundamental respects a pressure jet of the same type.

• No moving parts, meaning very little wear.
• Simple throttling, via a valve in the fuel line.
• Clean burning and very low emissions, especially as it is designed to use propane which burns very cleanly.
• It is possible that the engine can be built at home from plans or a kit. These are already commercially available kits.
• Simple design means that engines can be incorporated into either a helicopter's rotor blades or a fixed-wing aircraft's wings or tailfins.

• Engines need to be sonically tuned for maximum efficiency.
• Noise is very similar to that of a
  pulse jet engine
  , which could cause discomfort for passengers and people on the ground.
• Very high engine temperatures are a problem (the engine can glow bright orange which creates an obvious material problem).
• Difficult to mount due to operating temperatures, intake valve assembly, and fuel supply.

• Gluhareff EMG-300
• Wheeling PJ1

• Valveless pulsejet
• Pulsejet
• Pulse detonation engine
• Jet engine
• Rocket engine

• A company selling plans for this engine, which can be built at home.
• Gluhareff Helicopter company website.