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Calum Tsang wrote:
>
> Hey folks,
<snip>
Wow, looks like fun!
A few comments to improve it, if you're interested:
You'll want to start with the arm as close to inverted as possible; this
gives a longer stretch of acceleration.
You'll need to think about some means to change the release angle for
the sling; that's how you aim it range-wise.
You might want to retain one end of the sling so that it doesn't foul
your shot.
Don't use your distance figures to set up a venue for the contest; I've
built elastic-operated Lego catapults with various aiming cogs and
widgets which could lob a 2x2 around 10m, so I expect a smallish Lego
trebuchet should be able to fling something dense and aerodynamic around
15m or more reliably.
Jeff
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Message has 2 Replies:
 | | Re: Trebuchet Fun
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| Calum i am now SO very sorry that I could not come out and join you for lobbing grapes. As a one off event to try in your back yard this looks like fun. BUT i want to warn people that as an RTLToronto event I don't want to see anyone get hurt. (...) (22 years ago, 28-Aug-02, to lugnet.org.ca.rtltoronto)
| | | Re: Trebuchet Fun
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| (...) Well duh :) We had to kick it out enough that it would overcome the startup friction of draging the grape along the slide bed, as well as having enough tension to collapse the stiff sling-material to a point where it would clear the structure. (...) (22 years ago, 28-Aug-02, to lugnet.org.ca.rtltoronto)
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Message is in Reply To:
| | Trebuchet Fun
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| Hey folks, Iain came by today and we ended up building a floating arm trebuchet to see what it would be like. In about an hour, we put together the model after using references from trebuchet.com. Iain figured out the layout of the mechanism and we (...) (22 years ago, 28-Aug-02, to lugnet.org.ca.rtltoronto)
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