Tom's daughter seems to have done another great catenary arch toothpick bridge. Tom wrote: As my daughter tells the story, there was a single loud snap, followed by the crash of weights hitting the floor under the test fixture. It weighed in at 118 grams, spanned some 40+ cm, and held an amazing 125 lbs !! That rating acheived an efficiency just shy of 500, and earned an A+. The design was a winner in the class. Thanks again for the advice. Will send pictures when I get them loaded. - tom. Another Cool Arch |Home| |Pi details| |About stone| |The Inventions| Music Store| |More Hugh|