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Collapsible wheel
I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan -- Dan Burkhart |
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#2
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Collapsible wheel
On Thu, 6 Mar 2008 11:41:54 +1100, Dan Burkhart
wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan Dear Dan, Grout's 1878 folding highwheeler: http://i31.tinypic.com/2a0doie.jpg Cheers, Carl Fogel |
#3
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Collapsible wheel
On Mar 5, 8:36 pm, wrote:
Grout's 1878 folding highwheeler: http://i31.tinypic.com/2a0doie.jpg Is than an S&S coupling low on the spine? |
#4
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Collapsible wheel
On Wed, 5 Mar 2008 18:00:04 -0800 (PST), Brian Huntley
wrote: On Mar 5, 8:36 pm, wrote: Grout's 1878 folding highwheeler: http://i31.tinypic.com/2a0doie.jpg Is than an S&S coupling low on the spine? Dear Brian, Well, it's the 1878 version of an S&S coupling. "Think of a new idea in bicycle design and someone will have already invented it, probably in the nineteenth century." --John Pinkerton According to Henry Sturmey, quoted in the "It's in the Bag!" history of folding and portable bikes by Tony Hadland: "The backbone is provided with a joint (a) about two-thirds of the way down, and can be taken in two by removal of a bolt. This is the only joint in the frame-work, the chief difficulty being of course the wheel, and this is constructed in four parts, the rim-pieces being connected by simple bolts (B), and the spokes screwing into the four parts of a light ring, which are secured to the periphery of the hub by neat catch-bolts." Grout's folding highwheeler supposedly took about ten minutes to knock down or reassemble and cost two to three times as much as a typical highwheeler. The idea was that you could carry it onto the railway car without any back-talk from insolent railway porters, who wanted to charge extra for bicycles, leading to fierce lobbying wars for free bicycle transport in the UK and the US before 1900. (You'll be pleased to know that we usually won, but the railways kept trying to pull sneaky tricks.) Cheers, Carl Fogel |
#5
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Collapsible wheel
In article ,
Dan Burkhart wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan Very clever, but I fear that except for the special case of wheelchairs, they are overestimating the downside to small wheels. -- Ryan Cousineau http://www.wiredcola.com/ "In other newsgroups, they killfile trolls." "In rec.bicycles.racing, we coach them." |
#6
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Collapsible wheel
On Thu, 6 Mar 2008 11:41:54 +1100, Dan Burkhart
may have said: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Looks like they've got a tubular tire on there in a flanged rim with no glue. I have to wonder about the weight, rigidity and durability of the wheel; that many joints would seem to provide too many opportunities for things to get sloppy. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
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Collapsible wheel
On Thu, 06 Mar 2008 05:46:53 GMT, Ryan Cousineau
may have said: In article , Dan Burkhart wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan Very clever, but I fear that except for the special case of wheelchairs, they are overestimating the downside to small wheels. Much depends on the requirements; I find that a 20" folder leaves something to be desired if more than a few miles of riding at a time will be needed, or if it must carry my 195-lb carcass across unpaved or poorly maintained surfaces. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
#8
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Collapsible wheel
Ryan Cousineau wrote:
In article , Dan Burkhart wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan Very clever, but I fear that except for the special case of wheelchairs, they are overestimating the downside to small wheels. Why would someone want large wheels for riding on the road? -- Tom Sherman - Holstein-Friesland Bovinia The weather is here, wish you were beautiful |
#9
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Collapsible wheel
On Mar 8, 11:30 am, Tom Sherman
wrote: Ryan Cousineau wrote: In article , Dan Burkhart wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Very clever, but I fear that except for the special case of wheelchairs, they are overestimating the downside to small wheels. Why would someone want large wheels for riding on the road? The gyroscopic effect keeps you upright in case you have narcolepsy and doze off. R |
#10
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Collapsible wheel
Werehatrack wrote:
On Thu, 06 Mar 2008 05:46:53 GMT, Ryan Cousineau may have said: In article , Dan Burkhart wrote: I'm sure we've all had one collapse when it wasn't supposed to, but this one is designed to do it. http://www.duncfitz.co.uk/wheel.html Dan Very clever, but I fear that except for the special case of wheelchairs, they are overestimating the downside to small wheels. Much depends on the requirements; I find that a 20" folder leaves something to be desired if more than a few miles of riding at a time will be needed, or if it must carry my 195-lb carcass across unpaved or poorly maintained surfaces. It's a rough ride on the small wheeled bicycles unless they have suspension. |
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