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hornet squash ball launcher

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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hornet squash ball launcher

Unread postAuthor: kydavies » Fri May 14, 2010 11:40 pm

This is my ''mini'' (compared to what i normally build) pneumatic squash ball cannon. i had to scale down te size of my more recent launchers for ease of transport cause im moving in july.

total length: 2'7''
barrel: 1.5''(od) by 21 inchs long
chamber:1.5''(od) by 16 + the short length of ¾
valve: ¾ sprinkiler valve modded for pnrumatic operaton

i dont know how far this cannon shoots but im estimating about 35-45m

i do have a video but il put that up tomorrow after some more testing
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Attachments
Mini3.jpg
Mini2.jpg
modded sprinkiler valve, QEV on the end of the tubing
mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
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kydavies
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Unread postAuthor: mark.f » Sat May 15, 2010 12:52 am

Neat. Only one thing: the zip ties on the hosing. I would use a pair of hose clamps instead, as I don't see how you could possibly get the zip ties tight enough to hold safely.

Other than that, very nice.
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Unread postAuthor: metalmeltr » Sat May 15, 2010 8:10 am

Nice simple cannon. If the zip ties were tightened with a tip tie gun they should be fine, otherwhise replace them with a hose clamp.
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Unread postAuthor: Technician1002 » Sat May 15, 2010 9:46 am

For a later improvement, try to keep the chamber size large up to the sprinkler valve. The reduction for the 2 90's produces two areas of turbulent high speed flow resulting in considerable pressure loss before the valve. As an added benefit, the strength of the overall launcher is stronger with larger elbows.

I agreee that the proper clamps must be used. A hose popping off will fire it resulting in a possible injury or property damage. Safety first.
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Unread postAuthor: kydavies » Sat May 15, 2010 12:43 pm

the zip ties were a temporary measure cause i couldnt find a hose clamp, also because of the zip ties im only firing it at 30 psi. the U shape design with the two elbows was to keep this launcher as small and compact as possible but yet have some descent power for its size.
i also did a hose test ( dry fire) the hose poped off at 60 psi without anything holding it down (no zip ties or hose clamps)

PS. home hardware is freaking expensive!! :(

edit: i could not find a larger valve anywhere and that 1.5 to 3/4 bushing on the chamber was already glued on because the pvc i used was from another cannon
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mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
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Unread postAuthor: metalmeltr » Sat May 15, 2010 12:57 pm

what is home hardware, I have never herd of this company
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Unread postAuthor: kydavies » Sat May 15, 2010 1:01 pm

its a Canadian company
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mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
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kydavies
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