mike everman's tech corner

My Technical Interest Blog see also: www.bell-everman.com or I can be reached at everman@bell-everman.com

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    Triple Pipe Pulse-Jet

    A very successful adaptation of my "Pocket Jet 2" geometry into a triple pipe pulse jet.  Volumes were triple and all lengths were the same as its single parent, but thrust was sqrt3 of instead of the 3x expected.  Faaaaascinating...  I've been meaning to make a double and see if the thrust is sqrt2 instead of 2x.  Big case for having separate ducts instead of melding them into a single combustor.  This one split open at a UK meet that I put together.


    (download)
    Click here to download:
    triple run2 with thrust gage, 270 hz, empty propane tank.wmv (1.87 MB)

    (download)
    Click here to download:
    Triple_Pipe_Pulse-Jet.zip (5.78 MB)

    • 15 February 2010
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    • 7 Comments
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    over 2 years ago motiontechshawn (Twitter) responded:
    Mta_logo_normal
    Mike....very cool. I have no idea what it is but I like it!! You should build me some pipes for my 1050 sled engine!!! Look at these pieces of art :

    http://www.npowerperformance.com/

    about 2 years ago Rodney Smedt responded:
    Mike, this is amazing stuff - very cool. I especially like the six pack of sierra nevada's next to your work... :-)
    about 2 years ago Mike Everman responded:
    Mike Everman
    Thanks, Rodney, good to hear from you! Yes, a hydraulic press, lathe, welder and a good bitter pale ale are essential tools!
    8 months ago Oldtimer responded:
    I really don't understand why the thrust would be any higher than X3
    Do you know already what caused this unexpected increase in power?
    8 months ago Mike Everman responded:
    Mike Everman
    Oldtimer, it was not over x3, it was sqrt3 times x3.
    8 months ago Oldtimer responded:
    Now I understand,....i think.. Strange indead....you would expect X3 as you mentioned.
    7 months ago ganuganu responded:
    hello mike, this is a great project i have a doubt can you please verify it.
    is it like joining three pulsejet together by not changing either their volume or lengths.
    And you said that you got sqt3 thrust was there any changes in TSFC.

  • Mike Everman's Space

    I'm a former aerospace designer and all around technical geek. My interests include robotics, propulsion and precision clockwork. My business is designing and manufacturing industrial robotics.

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  • About Mike Everman

    I'm a former aerospace designer and all around technical geek. My interests include robotics, propulsion and precision clockwork. My business is designing and manufacturing industrial robotics.

    If you have been given a link to a specific post, be sure to click the "mike's tech corner" to see more posts. Feel free to comment on my work.

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