Small Jet Engines

Discussion in 'Community' started by Durandal7, Sep 8, 2003.

  1. Durandal7 macrumors 68040

    Joined:
    Feb 24, 2001
    #1
    Does anyone know where I could obtain a pair of small jet engines? They can't be very big, just enough to push about 200lbs through the air at a reasonable pace, the 200lbs would be suspended by helium balloons so the engines just need to push it.
     
  2. pseudobrit macrumors 68040

    pseudobrit

    Joined:
    Jul 23, 2002
    Location:
    Jobs' Spare Liver Jar
    #2
    It'd be too much money for any serious jet engines you'll find, unless you're truly hell-bent on getting jets.

    Just go for small props instead.
     
  3. Durandal7 thread starter macrumors 68040

    Joined:
    Feb 24, 2001
    #3
    Hmmm, you have a point.

    Doesn't matter in any case, I won't be the one paying the bill.
     
  4. MrMacMan macrumors 604

    MrMacMan

    Joined:
    Jul 4, 2001
    Location:
    1 Block away from NYC.
    #4
    Details!!!!

    :D
     
  5. e-coli macrumors 68000

    e-coli

    Joined:
    Jul 27, 2002
    #5
    The fuel for two jet engines would weigh more than 200 lbs, making your craft double the weight. Just get props.

    Besides, the exhaust from the jet engines would be quite a worry near a balloon. They tend to melt or weaken near high heat.
     
  6. TMay macrumors 68000

    Joined:
    Dec 24, 2001
    Location:
    Carson City, NV
    #6
    if it were me, I would model it in x-plane

    but I agree that a jet engine would be impractical (not efficient, costly, loud, difficult to start).

    Your biggest problem is that you need some sort of thrust vectoring to fine tune the balance and manuever in wind.
     
  7. Durandal7 thread starter macrumors 68040

    Joined:
    Feb 24, 2001
    #7
    Good points, props it is.

    So where can I get some small powerful props?
     
  8. WinterMute Moderator emeritus

    WinterMute

    Joined:
    Jan 19, 2003
    Location:
    London, England
    #9
    I used to have a model jet/glider when I was a kid, it ran on solid fuel pellets and went like greaed weasle-sh*t, once the pellet had expired it glided back to the ground.

    You might want to look in model shops, I'm sure there's something similar around for the scale-model airplane fanatics.
     
  9. MacBandit macrumors 604

    MacBandit

    Joined:
    Aug 9, 2002
    Location:
    Springfield, OR (Home of the Simpsons)
    #10
    Either type of engine can be picked up at any decent hobby store.

    Is this to propel the Badger?
     
  10. Mr. Anderson Moderator emeritus

    Mr. Anderson

    Joined:
    Nov 1, 2001
    Location:
    VA
    #11
    I've actually seen model jets flown along side model prop planes. Its pretty damn cool and I think if you did a google search you'd come up with something.

    The only thing is getting that much thrust is going to be tough....sounds like you want to push a person - but if its a blimp like object you don't need as much, since the lift is augmented by the balloons and not the wings.

    I'd love to here more about this.

    D
     
  11. cb911 macrumors 601

    cb911

    Joined:
    Mar 12, 2002
    Location:
    BrisVegas, Australia
    #12
    you should definitely check out some radio controlled scale model magazines and sites. i used to be into that sort of stuff, there are heaps of good sites on the net.

    this sounds interesting... come on, you gotta tell us what this is for.;) :)
     
  12. OutThere macrumors 603

    OutThere

    Joined:
    Dec 19, 2002
    Location:
    NYC
    #13
    Ummmm....could you fill us in on some details here? This sounds very interesting. :D
     
  13. TMay macrumors 68000

    Joined:
    Dec 24, 2001
    Location:
    Carson City, NV
    #14
    here's a jet engine link

    http://www.bairdtech.com/bmt/

    I've come across engines with thrust up to 45 pounds (a lot) for model aircraft. Do a google search and you will find a lot.

    Note that these are generally quite pricey ($2500-$5000)
     
  14. patrick0brien macrumors 68040

    patrick0brien

    Joined:
    Oct 24, 2002
    Location:
    The West Loop
    #15
    -Durandal7

    Id personally recommend ducted fans similar in design to the type used on blimps so that the blade tips aren't exposed.]

    If you are still hot-to-trot on little jet engines, you could look into purchasing a Auxillary Power Unit (APU), those little whiners you hear when boarding a commercial jet when the engines are off (ever wonder where the power and noise is coming from?).
     
  15. Durandal7 thread starter macrumors 68040

    Joined:
    Feb 24, 2001
    #16
    They won't be used for propulsion, they are being used to simply control the orientation.

    The idea is that this summer we will launch an updated version of the "guy in a lawnchair with balloons" experiment. This time it will be a new design capable of controlled flight.

    Why you ask?

    Because we are bored and eccentric engineering students.
     
  16. MacBandit macrumors 604

    MacBandit

    Joined:
    Aug 9, 2002
    Location:
    Springfield, OR (Home of the Simpsons)
    #17
    You didn't answer my previous question. Does this have anything to do with the Badger?
     
  17. Durandal7 thread starter macrumors 68040

    Joined:
    Feb 24, 2001
    #18
    The badger plan was scrapped for a few reasons:
    1) Badgers are hard to obtain
    2) Badgers bite
    3) It was illegal

    This plan is only illegal.
     
  18. job macrumors 68040

    job

    Joined:
    Jan 25, 2002
    Location:
    in transit
    #19
    And probably pretty expensive...
     
  19. coopdog macrumors 6502a

    Joined:
    Oct 5, 2002
    Location:
    The Great Midwest
    #20
    There is a show on TLC or Discovery channel called Myth Busters I think. They also tried to do to this but with out the engines. To see if the story was true. If I can remember right it took over $14000 in helium alone not to mention the 45+ weather balloons, getting a FAA guy to come out and make sure that it was safe and to get all the paper work through.

    I don't think you will need to call the FAA though.

    So your guy is about 200 lbs, then thoes props are going to be atleast 50 lbs each, and gas, and the platform. I would say with the ballons and all that looking at 300-400 pounds that would be a huge price in ballons and helium even at wholesale prices, not to mention the props.

    How much can you spend on this doo hicky? :)
     
  20. MrMacMan macrumors 604

    MrMacMan

    Joined:
    Jul 4, 2001
    Location:
    1 Block away from NYC.
    #21
    Obviously a hell of alot. of $$

    Tell your guy to go on a diet.

    :p

    That would kick a--

    Get some video/pictures if you ever put it together...

    :D
     
  21. cb911 macrumors 601

    cb911

    Joined:
    Mar 12, 2002
    Location:
    BrisVegas, Australia
    #22
    yeah, i kind of thought somehting along those lines. :p

    is... is that avatar a picture of... you?:eek: :confused:
     
  22. pseudobrit macrumors 68040

    pseudobrit

    Joined:
    Jul 23, 2002
    Location:
    Jobs' Spare Liver Jar
    #23
    That'd be a rocket, then, not a jet.
     
  23. pseudobrit macrumors 68040

    pseudobrit

    Joined:
    Jul 23, 2002
    Location:
    Jobs' Spare Liver Jar
    #24
    Have you thought about compressed air nozzles for thrust vectoring, like NASA uses?

    Small props for powered by tiny two-strokes are quite common.
     
  24. Durandal7 thread starter macrumors 68040

    Joined:
    Feb 24, 2001
    #25
    No, that's the infamous Nick Nolte mug shot (infamous in the States at least)
    http://www.thesmokinggun.com/mugshots/nolte1.html

    I may be funny looking but I don't look ravaged by drugs and alcohol :p
     

Share This Page