The Sunday Rocketeers

  1. Fazerruss

    Fazerruss Member

    Messages:
    2,354
    West Yorkshire
    Had an awesome day with my boy. We made some water rockets from pop bottles, something I last did about 30 years ago when I was a kid.
    I decided to go one better though and designed my own release mechanism so rather than waiting for the pressure to be enough to eject the bung I made a spring loaded trigger and firing pin.

    Or i should say "we" made it. He was with me all day and enjoyed every minute. ..



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  2. Fazerruss

    Fazerruss Member

    Messages:
    2,354
    West Yorkshire
    Here is the release mechanism. ....


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  3. Fazerruss

    Fazerruss Member

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    2,354
    West Yorkshire
    Launch pad....

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  4. Fazerruss

    Fazerruss Member

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    2,354
    West Yorkshire
    Firing pin

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  5. Fazerruss

    Fazerruss Member

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    2,354
    West Yorkshire
    Launch pad assembled. ..

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  6. Fazerruss

    Fazerruss Member

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    2,354
    West Yorkshire
    Rockets. ...

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    Iron man and hulk!
     
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  7. Fazerruss

    Fazerruss Member

    Messages:
    2,354
    West Yorkshire
    Test launch

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  8. Fazerruss

    Fazerruss Member

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    2,354
    West Yorkshire
  9. Parm

    Parm I have fun doing stuff

    Messages:
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    Location:
    Towcester
    That's a proper fun project

    Now tell the truth. You were the one that really wanted the rockets. The little lad was your excuse to make it all happen
     
  10. Fazerruss

    Fazerruss Member

    Messages:
    2,354
    West Yorkshire
    Dam it, you got me! :whistle:
     
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  11. I did this with my kids only I used the workshop compressor to charge the bottles.
    Fortunately both kids had ear defenders on and goggles as one rocket exploded on the launch pad (I'd foolishly upped the pressure to 150psi), unfortunately I didn't have ear defenders as the kids were wearing them and I seriously thought I'd permanently damaged by hearing, I had a ringing in my ears for hours afterwards as the sound had reflected back off the high corrugated walls of the workshop.
    Luckily my hearing returned to normal the next day.
    :ashamed:
     
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  12. Perhaps when your son is older you can build an air canon with him.
    The kids and me (mostly me) built one from an empty 47kg cylinder and a 3m length of 80mm CHS, the first meter or so of the CHS was inside the cylinder and I designed a full bore dump valve system.
    You placed your projectile in the tube, charged the cylinder to 150psi, took aim and opened a small valve, this released the pressure behind a big clack valve which had been sealing the end of the tube inside the cylinder allowing the entire contents of the cylinder to vent out of the tube.
    We could launch water filled plastic bottles about 300m horizontally in an arc, and with weighted aerodynamic projectiles (polystyrene cylinders with fold out fins) we were achieving distances of about 500m!!!
    We spent one summer precision bombing my mother in laws house (about 350m away) with projectiles, unfortunately the kids over ruled me when I devised a projectile with a noxious payload.:scared:

    Just to add that we live in the sticks, mostly farmland with very few neighbours and I wouldn't recommend doing this in the suburbs!
     
  13. This kind of thing but a bigger cylinder and tube.
     
  14. Fazerruss

    Fazerruss Member

    Messages:
    2,354
    West Yorkshire
    I fancy a spud gun next but made if aluminium not plastic waste pipe so more propellant can be used.

    MORE POWER :D:flame:
     
  15. pedrobedro

    pedrobedro Man at Matalan

    Messages:
    9,799
    Location:
    CX Derbyshire
    I used to help out at a lorry yard and the owner's lad used to fire bottles of water out of a compressor powered cannon made from stench pipe. They used to go a really long way.
     
  16. julianf

    julianf Member

    Messages:
    4,045
    Location:
    devon, uk
    I was asked to build a compressed air gun to shoot tennis balls.
    I couldnt find a decent bore for tennis balls, so i used a squash ball.

    Receiver was charged from a bike pump.

    The squash ball muzzle velocity was clocked at 156mph. I weighed the squash ball, did the sums, and worked out that was similar power to a small browing pistol, and, because of that, would require a licence and proper storage.

    I was going to add a pressure valve so as it could not be charged over a certain pressure, but, in the end, it was just decommissioned.


    If my experience is anything to go by, its fairly easy to make an air cannon that is, umm, excessive....
     
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  17. Pigeon_Droppings2 Member

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    1,888
    Location:
    london
    Fantastic work...kids really love building real things using real tools and equipment (with supervision of course).
     
  18. Maker

    Maker nEw mEmBeR

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    Don't ask questions
    68mm drain pipe is a perfect fit for a tennis ball.;)
     
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  19. I had planned to mount the air cannon on a trailer with an ack ack gun style rotating turret to take to the tractor events we used to go to but I was concerned that plod might take an interest so it was scrapped in the end.
     
  20. Pigeon_Droppings2 Member

    Messages:
    1,888
    Location:
    london
    Water canon is the way to go I think...nice and safe if the pressure is kept reasonable. Anything with flying objects is asking for trouble from the health and safety brigade!
     
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