Pulse Jet Engine Powered Bathtub Boat

[ixiuzsuper]

i wonder when will the iron melt!?!

[55dcyinely]

@ixiuzsuper It won't the temperature is constantly changing. Take a look at this video; 55JoyhDwggU

[FreedomRebel]

won't it melt without cooling ???

and can't you combine this maybe with a steam boiler for extra power & cooling...

or even a peltier element to generate electricity ?

[55dcyinely]

@FreedomRebel It won't the temperature is constantly changing. Take a look at this video; 55JoyhDwggU

[1stMrSceptical]

That gas cylinder's getting nice and warm

[Georgieisaporgie]

I wanted to see it cool down ):

[johnny1bucket]

Dear Santa...

[55dcyinely]

@johnny1bucket Their be no guessing having this land on your roof ?!?!?!?!?!?

[55dcyinely]

@johnny1bucket No melting! It would just stop working. And that is the down side of a Pulse Jet, you can't combined it with (or as a pair) anything as functional engine. It would how ever if submerged in water create steam.

[landyladv8]

Thanks for the reply, I hadn't realised you answered the exact same question in a previous post, sorry for being dumb!

[55dcyinely]

@landyladv8 It's cool! Build a bathtub boat and join us next year in Ely's bathtub boat race.

[Austyg]

-43 F == -41.7 celsius.

Do you mean propane gas will condense and boil at such cold temperature?

[55dcyinely]

@Austyg (NO! it looks to boil like water at 212° Fahrenheit.) Both BOILING AND CONDENSATION points assume a standard of 1 Atmosphere unless otherwise noted. A 20 gallon tank of propane at 70° Fahrenheit the liquid boils and turns into gas the pressure will be 109 PSI, another at 80° Fahrenheit the liquid boils and again turns into gas the pressure will be 128 PSI. See a trend? Temperature is the key factor! Lower temperatures the less the pressure is. And “Vice Versa”

[55dcyinely]

@Austyg So, Propane is Condensed into a -42° Fahrenheit Liquid until we make it boil and release it as a gas to BBQ.

[TonyODonnell01]

Hey did you guy's have any marshmallows to cook?

[55dcyinely]

@TonyODonnell01 Nope! You mean melt! Maybe next time.

[pcblah]

@TonyODonnell01 you mean incenerate :P

[landyladv8]

Very cool, is there any insulation between the red hot engine and the gas bottles?

[55dcyinely]

@landyladv8 Hello, NO! The gas is being consumed so fast that the bottle's are freezing up in-turn slowing the flow of propane vapor. Propane boil's at -43 Fahrenheit, "which is a gas at the freezing point of water!" So to help keep the propane from boiling I mounted the bottles close to the 1200 degrees, actually ORANGE HOT engine.

Thank you!

[neem2345]

looks great what is the thrust you recorded for this engine..

[55dcyinely]

@neem2345 The thrust is 70 lbs on propane vapor. I'm sure if I ran it on propane liquid it would be more!

Thanks!

[vamsterr]

wich tube is providing the thrust? the blue flame one or the other? very interested in this:) good video

[55dcyinely]

@vamsterr This is a Lockwood Valveless Pulse Jet Engine. It was Lockwood's idea to use both the intake and exhaust ports for thrust. The one with the blue flame is the intake port. Thank you 

[vamsterr]

@55dcyinely cheers man :)

[sappiou]

i think the gas tank is too way close to the hot tube...

[55dcyinely]

@sappiou Yes, it looks like it is. But No Problem! The gas tank doesn't even get hot!

Thank You

[55dcyinely]

Thank You!

[GerbilEssences]

It's.... beautiful :)

[55dcyinely]

@GerbilEssences Thanks!"it's even louder standing next to it"

[vanpenguin22]

Sad to see you ran out of fill right in time to miss the KA BOOOOOOM!!!!!!

Damn that movie and TV industry!

[55dcyinely]

@vanpenguin22

Yea! That’s the difference between fact and fiction!

[55dcyinely]

If the temperature of the cylinder were to exceed roughly 130°, the tank contains a safety relief valve that would release any pressure in excess of 300 psi. YES! Anyone in their right mind would not tempt faith. However, the propane vapor is being consumed so fast it is freezing the tanks in turn. It is really a misconception that propane tanks are prone to exposition. Thanks to Movie and TV entertainment industry!

[CountDollarz]

Awesome! propane tank or whatever fuel is in those tanks look too close to the hot engine tubing, could be a recipe for disaster.

[55dcyinely]

@CountDollarz Thanks! "it's all part of the show, what you think could happen and what's really happening"