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Frame material dispute solved for good.

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Frame material dispute solved for good.

Old 07-07-08, 02:56 AM
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urbanknight
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Frame material dispute solved for good.

Well, not really. Kind of a hokey display for a science museum that obviously skewed the facts in order to make a general point.



GT pursuit bike from the 1996 Olympics


You think this display might have been sponsored by Pacific Bicycles? Hmmmm?


California Science Center in Los Angeles if anyone cares.
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Old 07-07-08, 03:13 AM
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Pedaleur
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Do they have material samples that the kids (or grown kids) can play with? Many science museums have an exhibit on materials (not just for bikes) where you can bend wood, steel, etc., and see how each deflects under a given load. Kind of fun.

Of course, they would also need a shaped tubing exhibit to demonstrate the difference between 'laterally stiff' and 'vertically compiant'.
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Old 07-07-08, 03:22 AM
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^ LOL Bicycling Magazine should sponsor such a display. Anyway, the museum does have a display that has brake pads made of 3 different materials (wood, semi-metallic, and something else) and you can see which stops faster when you hold the brake down on each.

I personally think most of these displays could be designed better. There's a great one on rotational mass at the SD center, which has a sloped track of 2 sets of rails and 3 flywheels (two of them are the same weight but the weights are at the rim of one and the hub of the other). Problem is, the flywheel gets slightly off center and the weights whack the rails bringing it to a stop. There was a much better version of this at the Petersen Automotive Museum in L.A. but it was in disrepair the last time I saw it. That's to be expected with children, but I observed a grown man beating the crap out of a different display at San Diego. Go figure.

Oh, and for anyone who cares, when the display at Petersen worked, the flywheel with the weights at the hub spun up faster while the one with the rim weights reached a higher top speed and passed the former one by the time it reached the bottom.
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Old 07-07-08, 03:49 AM
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Originally Posted by urbanknight View Post
...on rotational mass at the SD center...
Without deraileuring the thread tooooo much, I am now envisioning a whole series of bike exhibits: spontaneously exploding carbon fiber, a wheel with a negative drag coefficient, smack your head against a wall with and without a helmet, does calling "on your left" make people jump left, tire rolling resistance, the list goes on and on ... we can settle the endless arguments once and for all.

Who wants to fund me?

---

With respect to your other comments, as a person who loves science centers (and has briefly dabbled in making exhibits), it's pretty hard to find the line between hands-on and long-lasting, as I'm sure you know.

Good stuff.
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Old 07-07-08, 09:20 AM
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Originally Posted by Pedaleur View Post
Who wants to fu** me?

Fixed. Wait, what?
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