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Spring Powered Arrow Driver (Read 129 times)
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Spring Powered Arrow Driver
May 21st, 2019 at 8:01am
 
Whilst at the summer cottage, we helped clear up the area, filling an entire skip with trash and unwanted stuff. One of those things we chucked was an ancient trampoline that's just been rusting away unused. Before it all went in the skip though, I liberated 6 springs which I'm now hoping to make some sort of arrow/bolt throwing device. Judging by how stiff they are, I'm thinking just the one spring will be more than enough power (I'm going to have to draw this thing and trust my building skills so I really don't want to overpower it and have it explode in my face). I just tried to see how much force I could get out of it and with fairly little stretch I got around 30kg/65lbs of force. I'll post a quick sketch of what I'm thinking of doing but it will be using rollers and with a bit of extra leverage I should be able to get higher numbers than that.

One thing I might need some tips for is the trigger mechanism. I need it a simple and strong as possible. Any advice? Any suggestions for bolts?
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Kick
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Re: Spring Powered Arrow Driver
Reply #1 - May 21st, 2019 at 8:05am
 
Very poor drawing but this is the basic idea (missing the trigger mechanism and much blockier than I'm hoping it will be). It would have two wheels on each side of the stock. The string stop is something else I need to have a think about.
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Re: Spring Powered Arrow Driver
Reply #2 - May 21st, 2019 at 9:05am
 
Tried again and got 35kg/around 75lbs. I'm thinking that if I can come up with a good way of loading it, I might be able to use two springs. I think that might need a winch though; I'm pretty weak Cheesy
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