Timeline for Theoretical question about double drivetrain (both-sides drive)
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 9, 2014 at 15:04 | vote | accept | linguamachina | ||
| Jul 9, 2014 at 14:26 | answer | added | paparazzo | timeline score: 3 | |
| Jul 7, 2014 at 22:54 | answer | added | Jahaziel | timeline score: 3 | |
| Jul 7, 2014 at 14:11 | vote | accept | linguamachina | ||
| Jul 9, 2014 at 15:04 | |||||
| Jul 7, 2014 at 13:55 | comment | added | paparazzo | You need make your question more clear. I get you are talking about forward and reverse (braking) (I think). But the "long gear for high top speed" implies there is a short forward gear. I am not seeing the benefit of a shorter of braking gear. | |
| Jul 7, 2014 at 8:26 | history | edited | linguamachina | CC BY-SA 3.0 |
Edited to allow removal of downvote
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| Jul 6, 2014 at 20:44 | comment | added | Daniel R Hicks | @Mσᶎ - My recollection, from pictures/descriptions, is that it was essentially as the OP describes, with two essentially identical drives, one on each side. The difference between the two was the gear ratios. And some sort of locking mechanism would allow the drive on one side to "freewheel" (I think at the crank) while the other side was driving, then the lock could be flipped to select the other side. One likely had to stop to make the switch. | |
| Jun 20, 2014 at 14:25 | comment | added | paparazzo | Now I follow. Careful what you ask for. In that set up if you let up the wheel then drives the pedals at faster cadence. | |
| Jun 6, 2014 at 18:37 | answer | added | whatsisname | timeline score: 3 | |
| Jun 5, 2014 at 22:20 | comment | added | Móż | @DanielRHicks do you mean the retro direct where you pedal backwards for a different ratio, or the modern mountain drive two speed bottom bracket? Or something else? | |
| Jun 5, 2014 at 17:30 | comment | added | linguamachina | @Kibbee Nice suggestion, I've seen those before. Really I'm just trying to get my head around this strange idea I had - I won't actually build up a bike like this, just can't figure out the physics of it. | |
| Jun 5, 2014 at 17:24 | comment | added | Kibbee | White Industries makes the DOS ENO Freewheel Which is a freewheel with 2 cogs on it that will fit single speed bikes. It allows you to switch between different gears, although you have to loosen the rear wheel to do so. | |
| Jun 5, 2014 at 15:00 | comment | added | Daniel R Hicks | I do believe some (very) old bikes used a variation of this scheme to achieve multi(2) speed gearing. Some sort of toggle on the crank selected which ring would be engaged. But very impractical, and not seen in perhaps 80 years. | |
| Jun 5, 2014 at 13:35 | comment | added | paparazzo | Just how would you expect it to magically shift grears? The are both attached to the same axle. The taller gear is going to be taking the load at all speeds. | |
| Jun 5, 2014 at 13:24 | history | asked | linguamachina | CC BY-SA 3.0 |