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Messages - StefanN

Pages: [1] 2 3 ... 19
Build journals / Re: Bugatti Type 37 Build
« on: 19 January 2020, 03:00:10 pm »
Shock absorber on an early Bugatti at the VSCC meet at Brooklands today.

My workshop is in Hinckley, about ten miles away and if anybody would like to come and see how far I have got with the 1906 GP Renault after the Museum meet, they would be most welcome.
Thanks for the invitation Adrian.  We'll come if we can as I'm really interested to see your CK - will just depend on what the journey home afterwards is looking like.

Build journals / Re: Brooklands Special - it works!
« on: 07 January 2020, 02:32:16 pm »
I'm posting this on behalf of Graham and am pleased to report that his cyclekart is now driving!

Members / Re: New member Martin Rose
« on: 02 January 2020, 11:48:14 pm »
Welcome Martin.

Have you considered pit bike wheels?   You’ll find more info here:  http://www.cyclekartsgb.com/where-to-get-stuff/wheels/

Announcements / Message rating icons
« on: 01 January 2020, 10:26:26 am »
I've disabled the message rating icons (thumbs up, like etc) for now because it was too easy to click one by accident (particularly on phones/tablets) and they can't edited  after you've let the page, even using admin functions.

Events / Re: Practical Classics
« on: 01 January 2020, 10:02:22 am »
Here’s the article

Events / Re: Practical Classics
« on: 29 December 2019, 12:29:27 am »
Cool, I’ll pick up a copy soon.

Thanks for organising this Graham

Tech Forum / Re: Chain tension
« on: 22 December 2019, 02:36:00 pm »
The guideline I read was 2-4% of distance between sprocket centres which would seem to be inline with Rhys’s contact’s measurement for a motorbike chain.

Tech Forum / Re: Wheels and spokes
« on: 18 December 2019, 01:58:21 pm »
That's interesting! My pitbike wheels have thicker spokes than the Honda!
Any chance you could share measurements - I had assumed they’d all be the same on the standard SDG hub.   If not it’ll be worth checking spoke diameter when buying because it’s not normally given on adverts.

Tech Forum / Re: Wheels and spokes
« on: 17 December 2019, 05:06:21 pm »
For those that might be interested, I've done some calculations based on a simplified model of the wheel to compare lateral strength of a pit bike wheel vs Honda C90 wheel.

Pit bike wheel: 32 spokes, spoke diameter 3.15mm, hub width 70mm, diameter of hub where spokes attached 75mm
Honda C90 wheel: 36 spokes, spoke diameter 3.6mm, hub width 54mm, diameter of hub where spokes attached 142mm

With the above geometry, spoke size and spoke count,  I estimate the pit bike wheel is 20-25% weaker laterally than the Honda wheel.  Interestingly, most of that appears to be down to the spoke diameter.

I did some more calculations to estimate the lateral forces on the wheels a a tight fast corner but there were too many unknown significant factors (Ck geometry, weight distribution, tyre friction, road surface, tyre spring, unevenness of the ground etc) to make the results meaningful.

Events / Re: Chester-le-Street Steam and Vintage Fair 11th-12th July 2020
« on: 13 December 2019, 06:58:49 am »
Much though I’d like to, I suspect it’s at least 5 hours from home towing a trailer so probably not for the practice day but possibly for the event.

Members / Re: New member Felloeman
« on: 10 December 2019, 11:40:03 am »
Welcome Daniel,

I’m looking forward to learning more about your build.  Do create a Build Journal (click one Forums at the top and then Build Journals) so we can follow your progress.

Tech Forum / Re: Wheels and spokes
« on: 08 December 2019, 04:35:23 pm »
In case you’ve not seen it there’s a helpful summary of various experiences with wheels and spokes on the US site

Tech Forum / Re: Lessons Learned - Safety
« on: 08 December 2019, 04:32:34 pm »
I’ve moved the discussion about wheels and spokes into it’s own topic to make it easier to find.

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