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M.H.I.S Thumper

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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M.H.I.S Thumper

Unread postAuthor: rna_duelers » Sat Nov 04, 2006 7:06 pm

Yes this thing looks stupid and not very formidable,but this thing surprised me alot from the first shot a a nice fitting tatter it sent it flying about 80meters and the chamber smacked me in the mouth and gave me a nice lump.

Its quiet to shoot and doesnt take very long to fill with a pump which is good as its portable.The C:B is about .5:1 and i have fired it at 150psi.It is all class 18 construction apart from the barrel which is class 12 both chamber and barrel are 50mm diametre.The valve is a 25mm modded sprinkler which for some unknown reason leaks a little out the sealing face.

Max Velocity:800fps+
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Attachments
thumper2.JPG
Chamber valve and schrader.
thumper1.JPG
The whole unit.
thumper1.JPG (11.71 KiB) Viewed 3512 times
thumper4.JPG
Special ammo for the 50mm barrel its a clay ball coverd in tape and cloth for stabalisers.
thumper4.JPG (15.19 KiB) Viewed 3381 times
thumper3.JPG
Thumper with PB barrel.
thumper3.JPG (11.4 KiB) Viewed 3381 times
Last edited by rna_duelers on Fri Mar 23, 2007 4:39 am, edited 3 times in total.
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Unread postAuthor: djt » Sat Nov 04, 2006 7:07 pm

nice gun. im a fan of small and portable guns.
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Unread postAuthor: rna_duelers » Sat Nov 04, 2006 7:19 pm

Thanks again.I was thinking of loading pics of my half finished hybrid aswell,but i'll finish it first.
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Unread postAuthor: ProfessorAmadeus » Sat Nov 04, 2006 7:22 pm

Why does the barrel look so wavy? I am starting to sway against sprinkler valves because pistons are so much better. Good job overall.
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Unread postAuthor: SquishY » Sat Nov 04, 2006 7:37 pm

Pretty kool... but, I'm with Professor on this one, try to make a 1" porting piston for it, and send that commie tater much farther.
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Unread postAuthor: rna_duelers » Sat Nov 04, 2006 11:06 pm

It was a quick throw together and it fun,plus i didnt have to worry about making the piston and why the barrel looks all wavy i dont no...Just how the photo was taken.
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Unread postAuthor: SquishY » Sat Nov 04, 2006 11:25 pm

Make one anyone anyone, couldn't be that hard to find stuff for a one that size. Besides it would't hurt, only help.
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Unread postAuthor: rna_duelers » Sun Nov 05, 2006 2:13 am

I might make a 25mm piston seeing as i got paid $85 but thats going into my next big project,and its going to be crazy.
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Unread postAuthor: SquishY » Sun Nov 05, 2006 5:05 am

Couldn't cost that much to make, just do it man, and make the porting threaded so you can use it on other stuff to, see where this is goin?
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Unread postAuthor: POS » Sun Nov 05, 2006 4:14 pm

ProfessorAmadeus wrote:Why does the barrel look so wavy? I am starting to sway against sprinkler valves because pistons are so much better. Good job overall.


I think sprinkler valves are very good for triggering the piston valves. But ot to use as a main valve.

BTW, nice gun. Try to shoot flour with it. See how far you can get. What pressure do you use ?
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Unread postAuthor: jrrdw » Sun Nov 05, 2006 4:59 pm

Does the barrel unscrew from the valve? Interchangeable barrels on this little bad ass! To cool!!!
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Unread postAuthor: rna_duelers » Mon Nov 06, 2006 1:23 am

POS-I think i might test the flour!That spunds fun a nice cloud but after it stops raining.Usualy at 120-130psi.

jrrdw-I do actualy have a smaller barrel for it which i didnt thing about posting its 20mm PB barrel and is 60cm long it is also good for marbles.

I'm going to get some pictures of the cool ammo i made for it up soon and the other barrel.
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Unread postAuthor: killagorrila99 » Mon Nov 06, 2006 1:32 am

Very nice gun. Is that a pope valve?
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Unread postAuthor: rna_duelers » Mon Nov 06, 2006 2:12 am

Sure is a pope valve,and there are new pics with the PB barrel and special ammo.
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Unread postAuthor: Urban Ninja » Mon Nov 06, 2006 2:17 am

I love that gun, a nice pistol style. Have you thought about maybe putting a detachable stock on it?
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