Jump to content

Spoke tension under load (hanging vs standing)


ZeroPlay

Recommended Posts

  • Replies 62
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

What do I do with all this popcorn now?  Confused  Please someone start a new controversial topic' date=' but quickly Cool[/quote']

 

Don't waste it. Go next door where there is a nice religious topic raging. Needless to say the dominee himself  sonehow managed to be at the epicentre of it all once again.  Just make sure your popcorn is Halaal and Kosher.
Link to comment
Share on other sites

Now that we are on the topic of wheelbuilding...  I ordered my powertap wheelset yesterday and asked for Mavic Open Pro rims from the wheelbuilder.  Was that the right option?  36 holes of course!

 

 
Link to comment
Share on other sites

Not Mavic!Shocked

 

Did it have a serial number? It is very important, otherwise the police will come and confiscate it.LOL<?: prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Ox_Wagon2008-12-10 09:00:02
Link to comment
Share on other sites

It is true. At first glance it does seem counter-intuitive. Upon proper' date=' deeper, analysis the stress/force calculations show it to be true.
It's been discussed in the past on the Hub with much associated wailing and gnashing of teeth. [/quote']

 

Where can I find these calculations (and gain an understanding of the behavior of structures under tension)?
Link to comment
Share on other sites

Now that we are on the topic of wheelbuilding...  I ordered my powertap wheelset yesterday and asked for Mavic Open Pro rims from the wheelbuilder.  Was that the right option?  36 holes of course!

 

 

 

Nice choice. Good rim (albeit expensive) and right spoke count. Don't let the builder be tempted by going 4X. Stay with 3X. If you have the guilders, ask him to build the wheel with DT Revolution or Sapim Laser spokes.

 

 
Link to comment
Share on other sites

 

What do I do with all this popcorn now?  Confused  Please someone start a new controversial topic' date=' but quickly Cool[/quote']

 

Don't waste it. Go next door where there is a nice religious topic raging. Needless to say the dominee himself  sonehow managed to be at the epicentre of it all once again.  Just make sure your popcorn is Halaal and Kosher.

 

Sweet, I'm right behind you... I'm the one trying to wing him with the cans of pineapple...

 

Link to comment
Share on other sites

It is true. At first glance it does seem counter-intuitive. Upon proper' date=' deeper, analysis the stress/force calculations show it to be true.
It's been discussed in the past on the Hub with much associated wailing and gnashing of teeth. [/quote']

 

Where can I find these calculations (and gain an understanding of the behavior of structures under tension)?

 

In my view, the best book for the layman is Structures (Or Why Things Dont Fall Down) by JE Gordon and published by Penguin. Exclusive Crooks has it from time to time. I think every engineer, architect, wheelbuilder or lawnmower repairman should read this book.

 

Secondly, if you want wheel specific, get a copy of The Bicycle Wheel by Jobst Brandt, published by Avocet Press. I stock copies of this for my wheelbuilding courses - yours for $25.

 

 
Link to comment
Share on other sites

Now that we are on the topic of wheelbuilding...  I ordered my powertap wheelset yesterday and asked for Mavic Open Pro rims from the wheelbuilder.  Was that the right option?  36 holes of course!

 

 

 

Nice choice. Good rim (albeit expensive) and right spoke count. Don't let the builder be tempted by going 4X. Stay with 3X. If you have the guilders' date=' ask him to build the wheel with DT Revolution or Sapim Laser spokes.

 

 
[/quote']

3X, 4X Confused

 

Damn, I have to go read up again.  Dankie Johan.  Will ask the wheelbuilder.

 

He seems to know what he is doing.  Not because of what he said about the wheels, but how he complained about guys who would rather spend ?400 on shoes than on proper wheels and a PowerTap!
Link to comment
Share on other sites

It is true. At first glance it does seem counter-intuitive. Upon proper' date=' deeper, analysis the stress/force calculations show it to be true.
It's been discussed in the past on the Hub with much associated wailing and gnashing of teeth. [/quote']

 

Where can I find these calculations (and gain an understanding of the behavior of structures under tension)?

 

In my view, the best book for the layman is Structures (Or Why Things Dont Fall Down) by JE Gordon and published by Penguin. Exclusive Crooks has it from time to time. I think every engineer, architect, wheelbuilder or lawnmower repairman should read this book.

 

Secondly, if you want wheel specific, get a copy of The Bicycle Wheel by Jobst Brandt, published by Avocet Press. I stock copies of this for my wheelbuilding courses - yours for $25.

 

 

 

LOLLOLLOL
Link to comment
Share on other sites

It is true. At first glance it does seem counter-intuitive. Upon proper' date=' deeper, analysis the stress/force calculations show it to be true.
It's been discussed in the past on the Hub with much associated wailing and gnashing of teeth. [/quote']

 

Where can I find these calculations (and gain an understanding of the behavior of structures under tension)?

 

As long as it is not Wikipedia as it refers to a finite element analysis that is using incorrect boundary condition.<?: prefix = o ns = "urn:schemas-microsoft-com:office:office" />

http://www.astounding.org.uk/ian/wheel/index.html

 

http://en.wikipedia.org/wiki/Spoke

 

 

 
Link to comment
Share on other sites

Now that we are on the topic of wheelbuilding...  I ordered my powertap wheelset yesterday and asked for Mavic Open Pro rims from the wheelbuilder.  Was that the right option?  36 holes of course!

 

 

 

Nice choice. Good rim (albeit expensive) and right spoke count. Don't let the builder be tempted by going 4X. Stay with 3X. If you have the guilders' date=' ask him to build the wheel with DT Revolution or Sapim Laser spokes.

 

 
[/quote']

3X, 4X Confused

 

Damn, I have to go read up again.  Dankie Johan.  Will ask the wheelbuilder.

 

He seems to know what he is doing.  Not because of what he said about the wheels, but how he complained about guys who would rather spend ?400 on shoes than on proper wheels and a PowerTap!

 

 

3X = 3 Cross spoke pattern

4X = 4 Cross spoke pattern.

 

Come to think of it, are you sure it is available in 36 spoke? I recall the max as being 32 spoke.

 

I must build that line about shoes into my sales talk. I'm going to practice it quickly.

 
Link to comment
Share on other sites

 

In my view' date=' the best book for the layman is Structures (Or Why Things Dont Fall Down) by JE Gordon and published by Penguin. Exclusive Crooks has it from time to time. I think every engineer, architect, wheelbuilder or lawnmower repairman should read this book.

 

Secondly, if you want wheel specific, get a copy of The Bicycle Wheel by Jobst Brandt, published by Avocet Press. I stock copies of this for my wheelbuilding courses - yours for $25.

  
[/quote']

 

Thanks - that Gordon book sounds like exactly what I'm looking for.

 

I actually have the Brandt book already (got it in a box of old bike stuff from a friend), but haven't read it yet.  I got the impression it wasn't going to explain the theory behind my question, but rather just present the results of his FEA model and note that this is consistent with the theory.
Link to comment
Share on other sites

Yes indeed' date=' so excited I got the facts wrong (are facts important?). 32 holes is the max for a PT...[/quote']

 

OK, thought so. Get him to build it 2 X.
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Settings My Forum Content My Followed Content Forum Settings Ad Messages My Ads My Favourites My Saved Alerts My Pay Deals Help Logout