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-   -   Yale students build spokeless bicycle (http://www.bikeforums.net/general-cycling-discussion/623679-yale-students-build-spokeless-bicycle.html)

FlatSix911 02-22-10 01:26 AM

Yale students build spokeless bicycle
 
Yale students build spokeless bicycle in one semester, now looking for jobs
Engadget article by Richard Lai posted Feb 17th 2010

Quote:


Quote:

http://www.engadget.com/2010/02/17/y...ter-now-looki/

http://www.blogcdn.com/www.engadget....e-02172010.jpg

Here's something that'll make you think twice before your next bike purchase -- the geniuses (genii?) at Yale University have built a pretty rad spokeless bicycle, which was somehow inspired by the lack of "pictures of a real spokeless bicycle online."
Sure, strictly speaking it's just a half-done product due to time (one semester) and budget restraints, but that rear wheel -- driven by the pedals on its geared inner rim -- alone should be enough to make you gasp. Practical hipsters might even be able to fit an electric motor or some sort of container inside the wheel, although we're pretty content with the futuristic hollowness.

Either way, the Yale grad who posted these photos is now available for hire, so pay him well and you can have it your way.


Cyclaholic 02-22-10 02:36 AM

How do you true the back wheel?

Joe_Mo 02-22-10 02:49 AM

Looks really cool, I just wish it was practical.

slipknot0129 02-22-10 03:30 AM

That looks simple. Why didnt they think of that a long time ago?

shouldberiding 02-22-10 07:11 PM

That thing looks like it weighs about 200 pounds.

Jeff Wills 02-22-10 07:20 PM

Quote:

Originally Posted by slipknot0129 (Post 10434351)
That looks simple. Why didnt they think of that a long time ago?

Somebody did:
http://bikerodnkustom4.homestead.com..._horseman.html
Something tells me he ain't a Yale student, neither.

FlatSix911 02-22-10 08:47 PM

Quote:

Originally Posted by Jeff Wills (Post 10437807)
Somebody did:
http://bikerodnkustom4.homestead.com..._horseman.html
Something tells me he ain't a Yale student, neither.

Yup ... very nice work from the School of hard Knocks :thumb:

http://bikerodnkustom4.homestead.com...9asSmallS2.jpg

RobotSonic 02-25-10 08:24 AM

Specialized made a no-spoke front wheel on a track bike way back:
http://farm4.static.flickr.com/3269/...0871d7ab_o.jpg

dougmc 02-25-10 12:09 PM

Sounds inefficient.

In the bearings of a standard wheel, the bearings rotate a few times for each rotation of the tire since they're so close to the center of the wheel. Each bearing moves a few inches per tire revolution ...

But for spokeless wheels, the bearings would be near the outside edge. Each one would move almost the same distance that the bicycle did for each rotation of the wheel.

So, there would be some aerodynamic advantages to doing this, but I'm guessing that it would weigh more, and the losses in the bearings would jump massively -- perhaps more than enough to offset and more the savings due to the improved aerodynamics.

Perhaps if the wheel was hovering in a magnetic field like a mag-train?

Either way, it looks cool ...

CommuterRun 02-25-10 01:47 PM

Quote:

Originally Posted by shouldberiding (Post 10437761)
That thing looks like it weighs about 200 pounds.

It does. I was thinking the frame looks like a steel monoblock.


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