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Old 2010-01-22, 08:53 PM   #31
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Quote:
Originally Posted by justtysen View Post
It looks like the shifter slides a dual ringed clutch along the crank spindle, and that the pegged teeth on either side of that clutch are spring loaded against each other. Their engagement being staggered on each side, so that when shifting one side is disengaged, and the other side's pegs are compressed, after enough of a rotation (that small coasting section) these pegs reach their corresponding notches and pop out, engaging the new side. The spring tension in the shifter itself would have to be greater than that in the combined pegs to prevent them from shifting the clutch back.
I think that's exactly how it works. I spent some time looking at the pics today and came to the same conclusion - considering that, it was quite an amount of nonsense what I wrote in post #3
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Old 2010-01-23, 12:47 PM   #32
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Originally Posted by hugo View Post
I think that's exactly how it works. I spent some time looking at the pics today and came to the same conclusion - considering that, it was quite an amount of nonsense what I wrote in post #3
Exactly, that' right
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Old 2010-01-23, 04:41 PM   #33
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i got a question why is it that this geared hub http://www.sjscycles.co.uk/product.a...S&currency=USD

only 129$ as the uni one is around 1500? what makes this hub so inferior and the other one SOOO much better?
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Old 2010-01-23, 05:00 PM   #34
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Quote:
Originally Posted by Cevinmiester View Post
i got a question why is it that this geared hub http://www.sjscycles.co.uk/product.a...S&currency=USD

only 129$ as the uni one is around 1500? what makes this hub so inferior and the other one SOOO much better?
The hub you cite is not inferior.

1.) The operation of the hub is entirely different.
2.) The hub is not required to withstand the transient torque of direct drive.
3.) The cog is driven rather than the axle.
4.) The hub freewheels rather than operate in fixed mode.
5.) The tolerances required are much less restrictive.
6.) The strength requirements are much less demanding.
7.) The market for that hub is at least two orders of magnitude larger.

Using the SEARCH feature in this forum would help you explore this independently.
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Old 2010-01-25, 12:36 AM   #35
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Quote:
Originally Posted by MuniOrBust View Post
What is "darkoman drive system"? My searches came up empty as far as drive systems are concerned.
That's because he misspelled it. The name is DAKOROMAN, and a search under that will yield better results.

The Dakoroman Drive System represents a light-year leap in unicycling hub design, rendering Schlumpf and all earlier geared hub systems obsolete. The design is so far ahead of its time, most RSU denizens fall short of the intellect needed to absorb it conceptually.

There are many threads which discuss the DDS, but this one is representative.

I believe reprah was able to complete a working prototype in his garage, although the residual energy shorted out much of his home's electrical system.
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Old 2010-01-25, 02:50 AM   #36
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Quote:
Originally Posted by tomblackwood View Post
That's because he misspelled it. The name is DAKOROMAN, and a search under that will yield better results.
Thanks! That helped. It's interesting.

Last edited by MuniOrBust; 2010-01-25 at 02:51 AM.
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