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I know ballistas and lever/spring assisted slingshots have been discussed here before. I didn't really understand much of that discussion.
But simplifying things a bit, would it be possible to have slingshot forks spring loaded. Eg the forks are located in runners and can move back compressing coil springs. The runners and forks would be made in such a way that the forks would not move around, they could only move backwards or forward. The slingshot would still use rubber bands.

Would this be of any benefit? Are springs more efficient than rubber when it comes to releasing stored energy?
 

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You're right, pelleteer. The spring strength would need to be chosen carefully and matched to the band strength and length. And even then it might not work and the problems you describe could occur,

Unless there was a way to pre set the springs and then trigger them at the same time as the pouch is released.
 

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Unless there was a way to pre set the springs and then trigger them at the same time as the pouch is released.
Ah! Some sort of preload mechanism might indeed work. Like you said, though, it would have to release at the same time as the pouch/bands. An intriguing possibility that I'm not enough of an engineer to figure out (
), but maybe Joerg or one of our other resident designers could work on.

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I'm also not enough of an engineer
And its possible that this idea has been discussed and dismissed in the previous threads about ballistas etc.

How about this one - pre set the springs, springs are now secure. Draw the slingshot and at a certain point in the draw the springs become "armed". Now at any point after this if the pouch is released, the springs release at about the same time. Would require some sort of trigger mechanism maybe with some smaller springs and cams etc. and could be connected to the pouch by means of a string. Or else the arming and releasing mechanism could use band tension. I have no idea of the practicalities of any of this
 

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Discussion Starter · #7 ·
Thanks Jörg, that is a very good explanation of the difficulties with this idea. It sounds as though rubber and springs aren't really compatible. Still, it's interesting to think about these things.
 
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