Author Topic: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill  (Read 4815 times)

Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #25 on: October 24, 2010, 04:31:13 pm »
Yikes, Ordinary racing in the wet. :o
Actually, it is rocket science.
 

Zipperhead

  • The cyclist formerly known as Big Helga
Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #26 on: October 24, 2010, 10:27:21 pm »
A few more


A rolling start for the penny race













The rest are here
Our son does know who Boz Scaggs is, we've done ok as parents.

Charlotte

  • Dissolute libertine
  • Here's to ol' D.H. Lawrence...
    • charlottebarnes.co.uk
Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #27 on: October 24, 2010, 10:35:06 pm »
What utterly fabulous pictures - thank you so much for coming and taking them  :)
Commercial, Editorial and PR Photographer - www.charlottebarnes.co.uk

Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #28 on: October 24, 2010, 10:38:35 pm »

That's an interesting chain, do you know why it's done like that?
Actually, it is rocket science.
 

Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #29 on: October 24, 2010, 10:40:11 pm »
You are an inspiration Aunty C! :thumbsup:

Zipperhead

  • The cyclist formerly known as Big Helga
Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #30 on: October 24, 2010, 10:55:41 pm »

That's an interesting chain, do you know why it's done like that?

No, I don't know if Mr. Hilldodger does. It was on a Rover. It looked like the chainwheel might have been a "normal" one, but with every other tooth filed off to make it mesh with the chain.
Our son does know who Boz Scaggs is, we've done ok as parents.

jellied

  • skip to the end
    • Ealing Bike Hub
Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #31 on: October 25, 2010, 10:23:08 am »
Amazing photographs. Although still not convinced to buy one. yet.

I'm sure Mr Ferris would love a copy [make sure you print it in black & white or sepia].
A shitter and a giggler.

Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #32 on: October 25, 2010, 10:47:41 am »
No, I don't know if Mr. Hilldodger does. It was on a Rover. It looked like the chainwheel might have been a "normal" one, but with every other tooth filed off to make it mesh with the chain.
Inch pitch Dave's Vintage Bicycles article-chain.htm

Re: 23/10/10 Vintage Penny Farthing racing 4:30pm - Hog Hill
« Reply #33 on: October 28, 2010, 10:43:20 am »

That's an interesting chain, do you know why it's done like that?

Skip-link chain is an obsolete roller chain for bicycles in which side plates are alternately short and long, and so rollers are alternately close together and far apart.

In bicycle chains, skip-link chain has the same one-inch spacing as both the earlier block chain. Due to the asymmetry, the rollers fit over long teeth used with earlier block chain, but due to the use of rollers, efficiency is better than block chain. Skip-link chain is typically arranged with the long plates also the wide-spaced outer plates, which mimics the visual effect of block chain. Since sprocket teeth run on rollers, they cannot be usefully wider than the width of the narrow-spaced links, so the tooth can be no wider than with a symmetrical chain. Thus, skip-link chain spreads wear over half the number of teeth and has worse sprocket durability than a symmetrical roller chain. Chain wear is dominated by wear between pins and bushings, and this is the same as a modern roller chain.