C
On 5 Dec 2004 01:29:36 -0800, [email protected] (papercut)
wrote:
>From a recent post elsewhere:
>
>>citing gerd schraner from his book "the art of wheelbuilding" --
>
>>the twisting of spokes, instead of classic crossing work is a waste
>of time for >road use. tests have shown that it results in a very
>unstable wheel. the >lateral stability is about the same as a
>normally spoked wheel, but radially the >wheel reacts so sluggishly
>that encounters with momentary radial overloads the >highly praised
>damping effect is delayed. ... twisted spoking patterns are an
>>additional mechanical disadvantage resulting from the extreme angle
>of the spoke >directly at the nipple. (schraner, p. 60)
>
>So, there is a claim that wheels with twisted spokes have a
>significantly different "damping factor" than normally laced wheels.
>The above quote given as evidence.
>
>It is also claimed that this "damping factor" inherent in
>twisted-spoke wheels are good for trials riding. This conclusion
>deduced somehow.
>
>
>Sounds like a lot of pseudoscience to me. What's the scoop on this?
And yet another set of twisted spokes, this one a unicycle:
http://www.xs4all.nl/~klaasbil/107_0755.JPG
Note that these use the double twist that distinguishes mere
chain-link from chicken-wire.
I doubt that I'll find four spokes twisted together, but
maybe some daring soul has gone to a triple twist?
Carl Fogel
wrote:
>From a recent post elsewhere:
>
>>citing gerd schraner from his book "the art of wheelbuilding" --
>
>>the twisting of spokes, instead of classic crossing work is a waste
>of time for >road use. tests have shown that it results in a very
>unstable wheel. the >lateral stability is about the same as a
>normally spoked wheel, but radially the >wheel reacts so sluggishly
>that encounters with momentary radial overloads the >highly praised
>damping effect is delayed. ... twisted spoking patterns are an
>>additional mechanical disadvantage resulting from the extreme angle
>of the spoke >directly at the nipple. (schraner, p. 60)
>
>So, there is a claim that wheels with twisted spokes have a
>significantly different "damping factor" than normally laced wheels.
>The above quote given as evidence.
>
>It is also claimed that this "damping factor" inherent in
>twisted-spoke wheels are good for trials riding. This conclusion
>deduced somehow.
>
>
>Sounds like a lot of pseudoscience to me. What's the scoop on this?
And yet another set of twisted spokes, this one a unicycle:
http://www.xs4all.nl/~klaasbil/107_0755.JPG
Note that these use the double twist that distinguishes mere
chain-link from chicken-wire.
I doubt that I'll find four spokes twisted together, but
maybe some daring soul has gone to a triple twist?
Carl Fogel