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spring loaded

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Strake » Tue Dec 18, 2007 5:16 am

ive almost finished my first air rifle that i'am going to post, all i got to do is paint it and then get some pictures of the gun and some damage pictures.

For my next project i was hoping to be able to build a pistol that uses a spring that when pulled back and let go compresses just enough air for a single shot is this possible to do??
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 18, 2007 5:18 am

It's possible, but compared to the power potential of even the simplest pneumatic launcher, it's not worth the effort in my opinion.
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Unread postAuthor: Strake » Tue Dec 18, 2007 5:20 am

so you dont think that you would get much power out of this. Dont slug guns work of kind of the same principal.
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 18, 2007 5:23 am

Strake wrote:so you dont think that you would get much power out of this. Dont slug guns work of kind of the same principal.


They do, but they use massive springs and heavily engineered mechanisms that require expertise to replicate, and even so the most powerful spring piston guns don't go above 40 ft/lbs of muzzle energy, while some commercial pneumatic rifles will do over 10 times that amount.

In short, if it's power you want, go pneumatic.
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Unread postAuthor: ALIHISGREAT » Tue Dec 18, 2007 5:25 am

i agree its not worth the effort, you shoud just go and buy a cheap bb gun and make a different project, but if you have your heart set on spring power then i suggest you go to nerf haven and check this out http://nerfhaven.com/homemade/boltsniper_far/ then get yourself on the forum and check out some more stuf in the finished section :)
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Unread postAuthor: Strake » Tue Dec 18, 2007 5:32 am

i cant buy a bb gun its illegal in Aus :( oh well, that FAR dosent look to bad i might try something like that one day but for now i might just have to stick to a good old pneumatic.

edit*ok ive got a new idea now lol when on wiki i seen a BB gun that ran on those small soda co2 canisters is there any way to use them in a pistol/rifle??
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 18, 2007 5:59 am

Strake wrote:ok ive got a new idea now lol when on wiki i seen a BB gun that ran on those small soda co2 canisters is there any way to use them in a pistol/rifle??


Buy a CO2 tire inflator and you can make a full auto machine pistol ;) <--- as made by a fellow Aussie
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Unread postAuthor: ALIHISGREAT » Tue Dec 18, 2007 6:05 am

or you could use unregulated co2 in a loud or vortex like BTB did http://www.spudfiles.com/forums/unregulated-metal-bullpup-adr-50-t11684.html
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Unread postAuthor: Strake » Tue Dec 18, 2007 6:14 am

not bad not bad would those co2 canisters work with a normal pneumatic rifle?, if so how long do you reckon a single shot would last? ohhh i love that ADR-50 i reckon i could do with something like that :twisted:
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Unread postAuthor: ALIHISGREAT » Tue Dec 18, 2007 6:31 am

there is a tool for calculating what pressure you will get from a 12g co2 in you chamber, i will find it for you

this one is for how much you need
http://www.spudfiles.com/forums/how-much-co2-do-i-need-t7133.html

and this is for pressure in a given chamber volume
http://www.spudfiles.com/spud_wiki/index.php?title=CO2_cartridge

and some general FAQs which includes how many shouts can i get from an X sized tank filling an X sized chamber
http://www.spudfiles.com/forums/co2-faqs-t10896.html
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Unread postAuthor: Strake » Tue Dec 18, 2007 6:36 am

math ohh its the holidays and its night time lol ill have to get all the measurements and what not later on thanks for the links
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Unread postAuthor: Twitcheth » Tue Dec 18, 2007 6:48 am

JSR are you aussie?
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 18, 2007 6:52 am

Twitcheth wrote:JSR are you aussie?


I thought I sounded more eloquent than that :roll: :D

...but seriously, I'm not ;)
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Unread postAuthor: Twitcheth » Tue Dec 18, 2007 7:02 am

Ok thankyou :lol: Problem solved. Ive been out in the sun all day so yeah lol. Now seriously go pneumatic or try n replicate JSR's crossbow Cute lil toy :D
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Unread postAuthor: SleekZ » Tue Dec 18, 2007 7:13 am

jackssmirkingrevenge wrote:
Twitcheth wrote:JSR are you aussie?


I thought I sounded more eloquent than that :roll: :D

yeah thanks for that comment ...ya testicle :wink:
...nah seriously though; don't spring powered air rifles generate like 4500psi with the piston?
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