Pulse jet rocket, first flight (ever?)

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Axel Borg
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Pulse jet rocket, first flight (ever?)

Post by Axel Borg » Sat Sep 17, 2011 6:14 pm

In progress...

http://www.youtube.com/watch?v=abr2Pt7SGi4

It is not perfect, but it flies!

ace_fedde
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Re: Pulse jet rocket, first flight (ever?)

Post by ace_fedde » Sat Sep 17, 2011 8:59 pm

Hi Axel,

So this:
viewtopic.php?f=3&t=6297
is you? !!
Give us all the answers!! :D

Fedde
Your scepticism is fuel for my brain.

Mark
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Re: Pulse jet rocket, first flight (ever?)

Post by Mark » Sun Sep 18, 2011 12:05 am

I liked watching the takeoff as it lifts off the launchpad. Nice effect.
Presentation is Everything

metiz
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Re: Pulse jet rocket, first flight (ever?)

Post by metiz » Sun Sep 18, 2011 12:34 am

Nice flight! What kind of fueling system are you using?
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Viv
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Re: Pulse jet rocket, first flight (ever?)

Post by Viv » Sun Sep 18, 2011 5:09 pm

Hi Axel

Congratulations nice flight, looks like you have started a whole new sport all on your own ;-)
"Sometimes the lies you tell are less frightening than the loneliness you might feel if you stopped telling them" Brock Clarke

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Axel Borg
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Re: Pulse jet rocket, first flight (ever?)

Post by Axel Borg » Sun Sep 18, 2011 7:41 pm

Thank you guys!

Just barley entered the flight test phase. All technical details will be in the book to come.
During this very first flight the engine ran on pure propane. I have been experimenting with
propane-diesel mix that seems promising. The exhaust smells jet-ish in a lovely way as well…

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Re: Pulse jet rocket, first flight (ever?)

Post by Viv » Sun Sep 18, 2011 8:46 pm

Hi Axel

Do me a really big favor on your next test flight, could you arrange a good quality microphone and recording set up so that not only the take off is heard but more importantly the actual flight as it progresses up in height and speed, the Doppler rip as it gets going should be really some thing ;-)

Viv
"Sometimes the lies you tell are less frightening than the loneliness you might feel if you stopped telling them" Brock Clarke

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PyroJoe
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Re: Pulse jet rocket, first flight (ever?)

Post by PyroJoe » Mon Sep 19, 2011 2:44 pm

Great work Axel,
Fins on the upper body can help the weather cocking, along with slightly reducing the lower fins area.
It is a bit tricky to do so and maintain a center of pressure behind the CG. Typically I think they look for 2 main body tube diameters (calibers) in between. Not so easy to translate to a pulse jet design.

It was genius with the magnets to allow it to throttle up before launching. I wasn't sure how to approach that problem.
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Jutte
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Re: Pulse jet rocket, first flight (ever?)

Post by Jutte » Wed Sep 21, 2011 6:50 am

Hey good one Axel - or should I say AmazingDIYproject guy ! :lol:
Most excellent indeed - the whole family gathered round and watched the vid !
I'm still grinning dude !

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Re: Pulse jet rocket, first flight (ever?)

Post by Mike Everman » Tue Aug 22, 2017 8:34 pm

Hi Axel, are you out there? Looking to find out if you can give us some details about the pulsejet rocket.
I just rediscovered your composite jet and rocket stuff again, and wonder if it's fueled by a can of WD-40?
If so, brilliant, man!
All these years gone, can you tell us more about the fueling challenges you solved?
Mike
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