10 Lb Thermojet Valveless Pulse Jet Engine

This is a 10 lb thermojet valveless pulsejet engine, all tig welded stainess steel. It is self starting, most pulsejets need to be provided with compressed or blown air in order to start the engine. This engine you can either light the propane with a torch or gril lighter, or a spark plug, and it will start right up.



The engine is a valveless pulsejet with no moving parts, and easily self starts on propane, just turn on the ignition and turn on the fuel....

A valveless pulsejet is a unique type of engine with no moving parts. Unlike ramjets, which must have air blown into them at high speed, either by a blower or by traveling very fast, pulsejets can run while completely still.

They can be throttled typically between 10% and 100% thrust in the blink of an eye, and dont require any spool up time like turbines or turbojets.

Because they have no moving parts, valveless pulse jets are much easier to own and operate than RC turbines. For the cost of a ducted fan setup, you could have your own real, high speed RC jet plane.

The truth is that by the time you add up turbojet planes engine weight, fuel and oil pump weight, the computerized control system, and any onboard starting systems, you not only have a small fortune invested in the plane, but its also quite heavy. Pulsejets can be made extremely light weight, and even valveless engines are capable of pumping their own liquid fuels by the venturi effect. All you then need is your standard reciever and servos and a small battery to power it, rather than a large battery to power a fuel pump.

Category:

Howto & Style

Tags:

• Thermojet
• valveless
• pulse
• jet
• pulsejet
• engine
• RC
• turbine
• turbojet
• ducted
• fan

[vonzace]

look at all that ENERGY, being wasted in the form of HEAT instead of PROPULSION.

[BeckTechnologies]

@vonzace Look at the ENERGY being wasted commenting on misunderstood thermodynamic principles.

[Themayseffect]

i dont know much about the abilities of mixing gases but there seems to be an argument over using methanol or kerosine. is it possible or has anyone tried mixing the 2 to creating a different type of burning process? more of a curious question.

[BeckTechnologies]

@Themayseffect Pulsejets will run on almost anything that burns, but if you deal with them on a daily basis, you'd probably go with propane too, since you dont come home every night stinking of kerosene. Methanol mixed with hydrocarbon fuels produce very good results. Hydrocarbons will burn significantly cleaner with methanol mixed in.

[Themayseffect]

@BeckTechnologies yea that i know. so what about nitromethane and alcohol. ive never seen those fuels used in turbines or pulsejets/dynajets

[BeckTechnologies]

@Themayseffect methanol - nitromethane fuel is the standard, and only allowed fuel in competition pulsejet speed flying events.

[bluttertifi]

I'm quite new to this, how does this work excactly, or simply :P

[Shockszzbyyous]

Why does it get red hot?

[eezy1972]

But what can you use it for?

[DynaDuctINC]

How did you make it valveless? I always thought pulse jets of that style need a valve. I've always seen valveless in a J shape.

[FPSArizona]

That's pretty neat.

[DynaDuctINC]

Now to figure out a way to stop the combustion chamber from melting

[125varma]

could you guess how much is the speed of the wind exiting the exhaust? I'm working on a project and I need to know the proximate wind speed generated by almost this size of engine :)

[Cwafter]

I dare you to poke the combustion chamber with your dick

[trailkeeper]

Maby some injected substances like water or water vapor could boost the thrust ability.

[TheHitman19957]

But will it blend?

[fubleduck]

I assume 10# is the jet's weight. What's the thrust?