new kind of propulsion?

[Dorkhedeos]

anybody try a pulse jet for their boat? Pulse Jet looks pretty powerful :lol:

 

[Russell Bear]

As long as it can be kept below 95db it should be fine..... :blink: :blink:

 

[GTR]

Pulse jets have been around for a long time - the noise they make is unbelievably LOUD. Using one of these in a boat would not be socially responsible.

 

[Russell Bear]

I heard one years ago. They are definetely low noise challenged.

 

[TimD]

Not the friendliest things either. I've seen one fitted to a control line combat wing :blink: :blink: crazy!.

 

[Tom v.d Brink]

no where did i hear this last????? :huh:

oh yeah i remember

View attachment 3382

B)

 

[Bart Drieghe]

:lol: :lol: Is that his afterburner Tom ?

Bart

 

[Russell Bear]

no where did i hear this last?????  :huh:

oh yeah i remember

View attachment 3382

B)

68131[/snapback]

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OUCH!!!

 

[tracerbob]

My dad had a Dynajet redhead powered control line plane when I was a little kid. That thing scared the sh#t out of me everytime we went to fly it. Saying it was loud is an understatement. No throttle either, just off and on.

 

[Brad Christy]

Guys,

Loud............ Very loud. Not to mention SSSSSSLLLLLLLLLLOOOWWWWWWWWW!

They work great in planes with little or no resistance at low speed. By the time you got one in a model boat big enough to overcome planing resistance, the boat would just sink like a rock.

Thanks. Brad.

Titan Racing Components

 

[Advance_United]

Curtis Dyna-Fog rates a stock Dyna-Jet Red Head running on gasoline with a static thrust of 4-1/4 lbs or greater. Historically, in C/L Speed planes, engines based on the Dyna-Jet have performed roughly equal to .60 - .65 racing engines. Speeds for Jet hit their peak around 212 mph using 50% nitro and 50% prop for fuel. Rules now require a spec fuel, 20% prop and 80% methanol. Top speeds are around 202. The current record holder develops 10-1/4 lbs static thrust.

Although they appear simple, the pulse jet operates on a very complex combination of pressure waves. Most of the air for combustion actually enters through the tail pipe. Pulse jets lose thrust as their speed increases. They are very sensitive to fuel feed. Since there is no "flywheel", any disruption in fuel feed can shut down the engine. Not good on water. And then there is the sound....

I like most to fly one at night. The cherry red combustion chamber and blue flame out the tail pipe is cool. And then there is the sound...

 

[izitbrokeyet?]

 

[Dorkhedeos]

did that miss bud have a pulse jet or did the engine just explode?

 

[not2bright]

probably wasnt an engine. and it wasnt a nirto boat because our fuel burns clear. im guessing a turbine that caught on fire or a gaser :blink: