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Bicycle Wheel Building Workshop - Cambridge - 6 Mar 2010
thirty-six wrote:
On 9 Feb, 21:30, David Green wrote: The details of the next Bicycle Wheel Building Workshop I will This is a practical course where you learn how to assemble and true strong and durable bicycle wheels. You will learn to build ’standard’ (36 spoke cross-3) wheels using proven wheel building techniques based on sound principles. Places are restricted to ensure a high teacher-student ratio. £75 for a cup of tea of which the mug needs to bring his own student, a sham. Brandt's book is not accepted, it's a sham. He makes grave errors which encourage the reader to build an inadequate and dangerous wheel with a poor expected lifespan (wheel or rider). Basing a practical course on this peicew of fiction is downright dangerous. I advise anybody foolhardy enough to accept tutoring by David Green, to etch his name on their wheel so that he may be persued for damages in the event of your death due to wheel collapse. I find such a course superfluous, and reckon that the classic book is enough (it was, for me). But then, I suppose there are people who can't easily learn from books. But what in particular do you reckon is wrong with the book? -- Dieter Britz (dieterbritzatyahoo.com) |
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Bicycle Wheel Building Workshop - Cambridge - 6 Mar 2010
On 10 Feb, 12:35, Dieter Britz wrote:
thirty-six wrote: On 9 Feb, 21:30, David Green wrote: The details of the next Bicycle Wheel Building Workshop I will This is a practical course where you learn how to assemble and true strong and durable bicycle wheels. You will learn to build ’standard’ (36 spoke cross-3) wheels using proven wheel building techniques based on sound principles. Places are restricted to ensure a high teacher-student ratio. £75 for a cup of tea of which the mug needs to bring his own student, a sham. *Brandt's book is not accepted, it's a sham. *He makes grave errors which encourage the reader to build an inadequate and dangerous wheel with a poor expected lifespan (wheel or rider). *Basing a practical course on this peicew of fiction is downright dangerous. *I advise anybody foolhardy enough to accept tutoring by David Green, to etch his name on their wheel so that he may be persued for damages in the event of your death due to wheel collapse. I find such a course superfluous, and reckon that the classic book is enough (it was, for me). But then, I suppose there are people who can't easily learn from books. But what in particular do you reckon is wrong with the book? Ignorant of the purpose of triangulation in the spokes by interlacing. (assist in hub support with the spokes pointing fore and aft). This is a fundamental error which leads him to conclude that tighter spokes build better wheels (not) and tying and soldering spokes cannot show any advantage (Duh). He also ignores the line of the spoke at the interlace, although wierdly pays attention to the junction with the hub. It is correcting the line of the spoke at the interleave which allows the spoke to work as a purely tensile element, without bowing, at all working tensions. This results in a superior wheel with lower working spoke tensions. |
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Bicycle Wheel Building Workshop - Cambridge - 6 Mar 2010
thirty-six wrote:
On 10 Feb, 12:35, Dieter Britz wrote: thirty-six wrote: [...] a sham. Â*Brandt's book is not accepted, it's a sham. Â*He makes grave [...] But what in particular do you reckon is wrong with the book? Ignorant of the purpose of triangulation in the spokes by interlacing. (assist in hub support with the spokes pointing fore and aft). This is a fundamental error which leads him to conclude that tighter spokes build better wheels (not) and tying and soldering spokes cannot show any advantage (Duh). He also ignores the line of the spoke at the interlace, although wierdly pays attention to the junction with the hub. It is correcting the line of the spoke at the interleave which allows the spoke to work as a purely tensile element, without bowing, at all working tensions. This results in a superior wheel with lower working spoke tensions. What is triangulation? And are you saying that two spokes that cross each other can both be straight? It seems to me they must both bend, at the point where they touch each other. Or do I misunderstand you? -- Dieter Britz (dieterbritzatyahoo.com) |
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Bicycle Wheel Building Workshop - Cambridge - 6 Mar 2010
On 10 Feb, 15:25, Dieter Britz wrote:
thirty-six wrote: On 10 Feb, 12:35, Dieter Britz wrote: thirty-six wrote: [...] a sham. *Brandt's book is not accepted, it's a sham. *He makes grave [...] But what in particular do you reckon is wrong with the book? Ignorant of the purpose of triangulation in the spokes by interlacing. (assist in hub support with the spokes pointing fore and aft). *This is a fundamental error which leads him to conclude that tighter spokes build better wheels (not) and tying and soldering spokes cannot show any advantage (Duh). He also ignores the line of the spoke at the interlace, although wierdly pays attention to the junction with the hub. *It is correcting the line of the spoke at the interleave which allows the spoke to work as a purely tensile element, without bowing, at all working tensions. This results in a superior wheel with lower working spoke tensions. What is triangulation? Like as used in electricity distribution pylons, as used in a bicycle frame. In the wheel it reduces the 'shear' between hub and rim. It is irellevant to the spokes pointing up and down, only in those pointing fore and aft. And are you saying that two spokes that cross each other can both be straight? From the rim to the crossing and from the crossing to the hub flange, YES. The spokes are best not left dead straight because the spoke lying inside the flange will not be adequately supported unless the drillings are suitably angled. Another spoking arrangment is to tie and solder the spoke at two crossings without the interleave, for which I did last year on a front wheel which now behaves as if it was running on rails along with excellent suspension characteristics. There is no skitting of the wheel when taking bumpy corners at speed. It seems to me they must both bend, at the point where they touch each other. In a usual lacing arrangement,YES. The radius of that bend affects extension to load ratio which is variable (and unecessarily high) due to a large radius as is normally installed. A poor get around is to make excessive tension in the spokes, which tear apart lightweight and some regular rims. Making the radius at the point of spoke contact tighter by manually creating a permanent bend at installation permits the use of lower spoke tension with a much more satisfying wheel. Or do I misunderstand you? Only if you want to. |
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Bicycle Wheel Building Workshop - Cambridge - 6 Mar 2010
In message , Dieter Britz
writes thirty-six wrote: On 9 Feb, 21:30, David Green wrote: The details of the next Bicycle Wheel Building Workshop I will This is a practical course where you learn how to assemble and true strong and durable bicycle wheels. You will learn to build ’standard’ (36 spoke cross-3) wheels using proven wheel building techniques based on sound principles. Places are restricted to ensure a high teacher-student ratio. £75 for a cup of tea of which the mug needs to bring his own student, a sham. Brandt's book is not accepted, it's a sham. I find such a course superfluous, and reckon that the classic book is enough (it was, for me). But then, I suppose there are people who can't easily learn from books. But what in particular do you reckon is wrong with the book? Noooooooo !!!!! -- Chris French |
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