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In lugnet.off-topic.geek, David Goeb writes: OK, thanks, I will think about keeping slack in the tent when I start throwing rocks, that is easier to put in than tin plate. I'm sorry, I put a rubber eraser "rock" on a postal scale, rounded up the (...) (23 years ago, 5-Jan-02, to lugnet.off-topic.geek)
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(...) Concrete 2.4-ish and so are most non-ore rocks sandstone etc (Gieck 7th ed) (...) That was an offhand worst deformation with minimum attachments guess. You may need only 5 as 80% of the V will be lost by then anyway. (...) You got it, that (...) (23 years ago, 5-Jan-02, to lugnet.off-topic.geek)
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I've figured out a better way - if the data entry guy stays *in* a truck all day, he has less to worry about.... ties up that truck though. I'm still going to build a catapult though. Going to test it on household materials first... I imagine I can (...) (23 years ago, 6-Jan-02, to lugnet.off-topic.geek)
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(...) A gravity-powered catapult is called a trebuchet. This site is a good place to start: (URL) are lots of links to other sites with plans, etc. I made a small one last summer, with a beam ~50cm long. It can fling a ~10g rock over 50m. Much fun! (...) (23 years ago, 7-Jan-02, to lugnet.off-topic.geek)
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(...) <snip my new summer project ;) > Trebuchet is also my favorite MS font. I just got done designing a flyer for a conference using this for the logo. Now I know where the name comes from. thanks! -chris (23 years ago, 8-Jan-02, to lugnet.off-topic.geek)
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K.K. Quah has designed a Lego trebuchet. (URL) (23 years ago, 9-Jan-02, to lugnet.off-topic.geek)
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