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Spring advice

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Spring advice

Unread postAuthor: irisher » Wed Aug 04, 2010 3:33 pm

For an upcoming project I had to make a magazine. The problem I have encountered is with the spring on the magazine. I am trying to get a rectangular spring that is approximately 1/2" x 1" and 12" long. Any advice on how to make or where to buy one? I have considered a constant force spring but it won't work and I would like to avoid just gluing a bunch of hardware store springs together.
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Unread postAuthor: qwerty » Wed Aug 04, 2010 3:39 pm

Can't you use Two or Three springs spread out? you wouldn't have to glue that many together and can get them online or at hobby shops/hardware.
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Last edited by qwerty on Wed Aug 04, 2010 3:42 pm, edited 2 times in total.
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Unread postAuthor: jrrdw » Wed Aug 04, 2010 3:41 pm

I would use flat spring steel and fold it in a zigzag. You can get it from Ebay cheep.
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Unread postAuthor: irisher » Wed Aug 04, 2010 3:51 pm

I just looked but I can't find anything on ebay. Any keywords to help the search?
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Unread postAuthor: Crna Legija » Thu Aug 05, 2010 1:03 am

you could use this
or this product 9071K71
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Unread postAuthor: irisher » Thu Aug 05, 2010 10:46 am

I don't think a torsion spring will work for a magazine spring. Do you guys think a replacement spring for a thompson 30 rounder would work?
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Unread postAuthor: Moonbogg » Thu Aug 05, 2010 11:02 am

Perhaps a round spring with a rectangular plate on top?
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Unread postAuthor: irisher » Thu Aug 05, 2010 11:12 am

It is a possibility but, I would need two columns of 4 for it to work and that's a lot of springs. Also in my past experience unsupported round springs cause problems at that great of length. They tend to splay out and cause jams but; it may be my only option.
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Unread postAuthor: jrrdw » Thu Aug 05, 2010 11:21 am

http://www.westyorkssteel.com/spring_steel.html

http://www.springsfast.com/springs-products.htm


I found mine looking through the RC toys and hobbies section. If you dig around long enough you can find it. Above is 2 other places I found with a quick ask.com search...
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Unread postAuthor: irisher » Thu Aug 05, 2010 3:12 pm

I appreciate the links but, I can't order from the UK one and the other has nothing I can't just get at my hardware store.
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