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HARPOON GUN PICS
http://forum.spudtech.com/viewtopic.php?f=38&t=217
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Author:  Spudtech [ Mon Dec 02, 2002 7:00 pm ]
Post subject:  HARPOON GUN PICS

Originaly posted by Axt,
If these pics work...

Exhaust valve gun, 2.5" brass chamber with 1" Cu barrel firing a 5/8" aluminium harpoon. Did my best to actually make it look like a harpoon gun. The sights actually work and will pop a pidgeon at 20 paces.





Unknown how far this will actually shoot, end up staking someone if I shoot in the air here, but it keeps a nearly flat trajectory over 20m since the harpoon itself weighs little more then a potato.

Havnt tried to launch line yet as the brass catch that catches on the harpoon as it leaves the barrel is way too heavy, itll lose half its velocity as soon as it leaves the barrel. Might have to have something machined as i cant make anything light and strong enough.

Author:  Spudtech [ Mon Dec 02, 2002 9:00 pm ]
Post subject:  wow thats awesome!

Originaly posted by boogieman,
That is one of the coolest spudgun I have ever seen! Wow its a work of art! Is that thing on the bottom to reel the line in?

Author:  Spudtech [ Mon Dec 02, 2002 11:00 pm ]
Post subject:  yep

Originaly posted by Axt,
Work of art .. thats what i was claiming it was to security as they came round my room, seems they dislike people firing up angle grinders in the university accomodation rooms. Suprised i got away with that, said i was studying "contemporary art" :).

Yeh, my fishing rod has lost its reel for a while ... cant see any actual use for this gun however. Maybe those pesky dolphins that swim along in front of boats, thats where there could be a market for these Joel.

Author:  Spudtech [ Tue Dec 03, 2002 1:00 am ]
Post subject:  hmm

Originaly posted by the Mr T of PVC,
makes me think of the possibilities easton arrows and small brass tubing posses

Author:  Spudtech [ Tue Dec 03, 2002 2:00 am ]
Post subject:  small bores

Originaly posted by Axt,
I thought of those possibilities too .. I think a 1" chamber through a standard solinoid valve onto a 5/8" barrel may work in a "bullpup" style configuration. Though 1/2" is a better fit for the arrow a 5/8" barrel should let you get more power onto it.

Ive actually made a small handgun using Al arrows in 1/2" Cu pipe as in -



Though its fairly weak, as you would imagine. Works good to around 10m though .. shooting it into a sheet of corkboard inside can be fun.

The "bullpup" talked about above is actually in the works, bought the chamber the other day - 1" steel steam pipe screw fitting one end threaded the other which i'll put onto a brass solinoid valve and see how it goes.

Author:  Spudtech [ Tue Dec 03, 2002 4:00 am ]
Post subject:  Ace harware

Originaly posted by the Mr T of PVC,
Well I used to work at Ace Hardware a few years back. They had this small aluminum and brass hobby tubing in lengths from 12" to 36" with diameters from 1/8" to 1/2" What if you took the knock off of the back of a reagular aluminum easton arrow.? ( they sell them at walmart for 2 or 3 bucks) by removing the knock the arrow becomes a hollow shaft. Now place a piece of the hobby tubing inside the arrow, make sure the tubing is big enough to give it a good seal, and its length goes almost to the tip inside the arrow. Now solder, weld, jb weld the inside tube to a threaded hose barb and attach that to you air sources brass fitiings. slide the arrow over the tube/ barrel and your all set. They used to make these comercially you might remember seeing one in a van damme movie


Author:  Spudtech [ Tue Dec 03, 2002 4:00 am ]
Post subject:  rocket

Originaly posted by the Mr T of PVC,
you could also try sliding a model rocket (with the nose cone glued in) ocer a piece of 1/2" or 3/4" pvc that would work too and would probably be safer than arrows

Author:  Spudtech [ Tue Dec 03, 2002 4:00 am ]
Post subject:  rocket

Originaly posted by the Mr T of PVC,
you could also try sliding a model rocket (with the nose cone glued in) ocer a piece of 1/2" or 3/4" pvc that would work too and would probably be safer than arrows

Author:  Spudtech [ Tue Dec 03, 2002 7:00 am ]
Post subject:  what PSI do you use it at?(nt)

Originaly posted by someguynamedchris,
?

Author:  Spudtech [ Tue Dec 03, 2002 5:00 pm ]
Post subject:  whatever works

Originaly posted by the Mr T of PVC,
when i made one i used co2

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