Innovative brake in old magazine.
03-11-22, 02:54 PM
#26
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As if you’re in any position to question the credibility of research assistant at DuPont’s Advanced Material Systems who holds a patent on aramid fibers as a wear additive…. Come off it, Jack.
03-11-22, 03:25 PM
#27
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You actually think I was serious? The joke is no one sees wet straps of kevlar.
Wait, you aren't seriously debating the merits of this long-defunct product, are you?
03-11-22, 03:51 PM
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Anyone remember reading an article about a new kind of break? This was back in the 90's I think. Might have been in popular science or popular mechanics. Someone came up with basically a groove like a pulley that went around the circumference of a rim. In this groove there was a Kevlar cord that went clear around and when you pulled the break lever it tightened the cord in the groove causing friction to stop the bike. It never did catch on but it was supposed to stop a bike very quickly.
Sounds like a concept from someone who didn't think it all the way through.
There'd be a not-insignificant drag on the wheel even when "loose"... and if too loose you risk the cord coming out of the groove and then you'll have a real problem
03-11-22, 05:33 PM
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03-11-22, 08:41 PM
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03-11-22, 08:43 PM
#32
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03-11-22, 09:23 PM
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Banned.
03-12-22, 11:02 AM
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03-13-22, 08:29 AM
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You mean all those bicycle-related patents from the late 1800s and early 1900s that have covered pretty much every "new idea" that we see these days? Having been in this racket for a few decades, you can dependably expect "breakthrough" products involving cam cranks, non-round chain rings, FWD/AWD, continuously variable gearing, shaft drive, puncture-proof tires, and on and on. The fact that these things have failed in the market repeatedly never seems to daunt the next generation of inventors/promoters.
03-13-22, 02:57 PM
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You mean all those bicycle-related patents from the late 1800s and early 1900s that have covered pretty much every "new idea" that we see these days? Having been in this racket for a few decades, you can dependably expect "breakthrough" products involving cam cranks, non-round chain rings, FWD/AWD, continuously variable gearing, shaft drive, puncture-proof tires, and on and on. The fact that these things have failed in the market repeatedly never seems to daunt the next generation of inventors/promoters.
03-13-22, 04:22 PM
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Look what I found! It's the Yankee Bicycle after Nordic Trac bought him out, complete with kevlar brake and radial gears:
03-15-22, 04:48 AM
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Good, the idea is still around then. Others will improve on it more. I like the shifter idea, wish I could have tried out a Yankee bicycle back then.
03-15-22, 06:14 AM
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03-15-22, 07:10 AM
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03-15-22, 11:28 AM
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03-15-22, 11:54 AM
#42
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Here's a fairly recent review of the bike: https://bikenewengland.com/2018/06/1...-transmission/
I must say, that is one diplomatic review, just glancing over the constant brake rub and pieces of plastic breaking off of the gears!
It'd be an interesting conversation piece if you could find one, but even if functioning, it doesn't sound like a fun ride. The rub would drive me nuts.
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