Death of The Derailleur? Honda’s Incredible Bicycle Gearboxes (All 3 Generations)
03-03-23, 11:24 PM
#27
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don't know the tech of the competitive 2 speed rear hub, either.
I'm the messenger, not the project(s) engineer.
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03-03-23, 11:42 PM
#28
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They're all planetary gear systems, and you can look them up yourself faster than I can look them up and post them. While you're at it, look up 'sturmey archer dual drive'.
Last edited by rollagain; 03-03-23 at 11:52 PM.
03-03-23, 11:56 PM
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I didn't ask the question.....
besides I wait for products to enter a more mature manufacturing volume before I jump.
besides I wait for products to enter a more mature manufacturing volume before I jump.
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03-04-23, 12:03 AM
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Last edited by Wildwood; 03-04-23 at 12:11 AM.
03-04-23, 05:18 AM
#31
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This isn't 3rd grade and you don't get to assign answering your question as homework.
03-04-23, 09:14 AM
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NuVinci Continuously Variable Transmission - Wikipedia
"NuVinci CVT technology is currently under development for additional applications... wind turbines,...outdoor power equipment,...automotive front-end accessory drives."
I cannot think of a lower profit margin market than bicycles, especially any bicycles not in the high performance racing category.
I remember considering NuVinci for a tandem that featured independent pedaling for captain & stoker, back in the mid-90s.
"NuVinci CVT technology is currently under development for additional applications... wind turbines,...outdoor power equipment,...automotive front-end accessory drives."
I cannot think of a lower profit margin market than bicycles, especially any bicycles not in the high performance racing category.
I remember considering NuVinci for a tandem that featured independent pedaling for captain & stoker, back in the mid-90s.
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03-11-23, 01:01 AM
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A pity that the video is gone... One of the Honda gearboxes used cams and a one-way clutch to produce an infinitely variable output. Back in about 1990 I knew an Australian guy called Eric Willmot who invented and patented this gearbox (Australian patents 1991906266 and 1992902568). Both patents have lapsed so I guess he didn't find a commercial application / backer. I helped him make a working model - it was a clever idea but I had my doubts that the output would ever be smooth enough or vibration-free. I have no idea if Honda used his design or developed the idea independently.
