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big daddy/jnr

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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big daddy/jnr

Unread postAuthor: FORE!!!! » Tue Aug 18, 2009 9:35 pm

here are my latest inventions ,the first one being a barrel sealing piston valve, the piston is housed in a 1'' brass threaded tee and is made from solid alunimium using a neoprene sealing face, it fills via quick connect and it shoots marbles out of a 3/4 copper barrel and is piloted by a 1'' modded sprinkler valve.


http://www.youtube.com/watch?v=_STbSEme52Q

all shoots were done at 80-100 psi

http://www.youtube.com/watch?v=AVO2-M3Flw4

the second one is called jnr and its a chamber sealing piston valve,made from a mini cistern cock ,the piston is solid brass used from the shaft on the cock with a neoprene sealing face which is piloted by a blow gun and fills via quick connect ,the barrel is aluminium tubing approximatly 5.5mm diameter with an internal bore of about 4mm

http://www.youtube.com/watch?v=koFovGOv_Zw
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Re: big daddy/jnr

Unread postAuthor: blind909 » Wed Aug 19, 2009 12:00 am

FORE!!!! wrote:here are my latest inventions ,the first one being a barrel sealing piston valve, the piston is housed in a 1'' brass threaded tee and is made from solid alunimium using a neoprene sealing face, it fills via quick connect and it shoots marbles out of a 3/4 copper barrel and is piloted by a 1'' modded sprinkler valve.


http://www.youtube.com/watch?v=_STbSEme52Q

all shoots were done at 80-100 psi

http://www.youtube.com/watch?v=AVO2-M3Flw4

the second one is called jnr and its a chamber sealing piston valve,made from a mini cistern cock ,the piston is solid brass used from the shaft on the cock with a neoprene sealing face which is piloted by a blow gun and fills via quick connect ,the barrel is aluminium tubing approximatly 5.5mm diameter with an internal bore of about 4mm

Did you mean CORK? Otherwise, nice guns

http://www.youtube.com/watch?v=koFovGOv_Zw
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Re: big daddy/jnr

Unread postAuthor: Mr.Sandman » Wed Aug 19, 2009 12:04 am

blind909 wrote:
FORE!!!! wrote:here are my latest inventions ,the first one being a barrel sealing piston valve, the piston is housed in a 1'' brass threaded tee and is made from solid alunimium using a neoprene sealing face, it fills via quick connect and it shoots marbles out of a 3/4 copper barrel and is piloted by a 1'' modded sprinkler valve.


http://www.youtube.com/watch?v=_STbSEme52Q

all shoots were done at 80-100 psi

http://www.youtube.com/watch?v=AVO2-M3Flw4

the second one is called jnr and its a chamber sealing piston valve,made from a mini cistern cock ,the piston is solid brass used from the shaft on the cock with a neoprene sealing face which is piloted by a blow gun and fills via quick connect ,the barrel is aluminium tubing approximatly 5.5mm diameter with an internal bore of about 4mm

Did you mean CORK? Otherwise, nice guns

http://www.youtube.com/watch?v=koFovGOv_Zw

Look who finally decided to come back to spudfiles. :lol: Like blind said, What is a mini cistern cock?
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Yeah, it's that important.
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Re: big daddy/jnr

Unread postAuthor: jackssmirkingrevenge » Wed Aug 19, 2009 12:07 am

Mr.Sandman wrote: What is a mini cistern cock?


One of these :)

Image
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Unread postAuthor: FORE!!!! » Wed Aug 19, 2009 12:25 am

yes jack that is one but my one is smaller,and no i dont mean cork,i mean cock altho it may be spelt differntly, but is pronounced cock , plumbers terminology

look here
http://www.blmarshall.co.nz/shop.php/pl ... c_463.html


http://www.spudfiles.com/forums/pilot-v ... 19013.html

this first pic in the topic is the mini cistern cock
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: jackssmirkingrevenge » Wed Aug 19, 2009 12:38 am

FORE!!!! wrote:yes jack that is one but my one is smaller


It's not many folk who will claim on a public forum that their cock is smaller :D

fine, I'll get my coat :D
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Unread postAuthor: FORE!!!! » Wed Aug 19, 2009 1:37 am

Its not the size of the weapon that counts its how you use it :D
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: john bunsenburner » Wed Aug 19, 2009 2:48 am

Meh, size is pretty important too!
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Unread postAuthor: FORE!!!! » Wed Aug 19, 2009 3:16 am

well im 6,2 95kg and my hand measures 210mm from wrist to the top of my middle finger, u do the math or the stereo typical math

but if its the size of ur gun that were talking about, then yes size does matter :wink:
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: john bunsenburner » Wed Aug 19, 2009 3:28 am

How much easier to hold a ruler to it after you "Yanked it like a monkey in a mango tree"First one to name the show gets a cookie.

Cannon size doesn't really matter, some of the largest cannons on here are far from the most powerful.
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Unread postAuthor: FORE!!!! » Wed Aug 19, 2009 3:52 am

ahhhhh those were the days ,it reminds me of when i was in yr7,lol

i never mentioned power! how about distance ?? which is more on topic atm, considering a larger heavier projectile will travel further than a small /lighter one :wink:
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: john bunsenburner » Wed Aug 19, 2009 4:25 am

how about distance


Look at my cieling!
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Unread postAuthor: inonickname » Wed Aug 19, 2009 4:28 am

FORE!!!! wrote:ahhhhh those were the days ,it reminds me of when i was in yr7,lol

i never mentioned power! how about distance ?? which is more on topic atm, considering a larger heavier projectile will travel further than a small /lighter one :wink:


A smaller projectile will have less drag, so not exactly.

Density is the big thing (cross sectional mainly) for penetration and range.
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