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Author Topic: Frazer Nash Norris Special  (Read 1141 times)

Mark Under

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Re: Frazer Nash Norris Special
« Reply #15 on: 08 November 2020, 07:11:00 pm »
I managed to get some time in the workshop today, mainly thanks to the lockdown.

Following a visit to see Stefan’s very nice Bugatti and several attempts at scaling the chassis for my build I took the plunge and welded a chassis up.

I figure if it’s wrong I can soon cut and shut it etc!

Front axle next,

Marek.Z.N

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Re: Frazer Nash Norris Special
« Reply #16 on: 08 November 2020, 09:01:44 pm »
quick progress! looks great

jim

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Re: Frazer Nash Norris Special
« Reply #17 on: 09 November 2020, 06:20:07 am »
Looking like you had a good day there mark. What size RHS did you use? I only ask because I have some 25x50 and would like to use it up on possibly another CK build.

Mark Under

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Re: Frazer Nash Norris Special
« Reply #18 on: 09 November 2020, 06:11:55 pm »
Its 25x50x2 Box section, mainly because I had some and my mig welder has 1mm wire in it at the moment.

I think to try and weld 1.6mm ERW box I would of had to buy 0.8 mig wire, tips etc. 

Welding 2mm steel with 1mm wire was not the easiest!


RhysN

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Re: Frazer Nash Norris Special
« Reply #19 on: 09 November 2020, 06:50:41 pm »
I do have a Fraser Nash/GN type axle available just right for the Norris inspiration  :)

Mark Under

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Re: Frazer Nash Norris Special
« Reply #20 on: 09 November 2020, 10:24:28 pm »
Rhys, thanks for the offer of the axle but to me, the fun of it is building the kart as much as possible from scratch.  Hopefully I might get the front axle built this weekend, the bigger problem is front springs!

Thanks Mark


RhysN

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Re: Frazer Nash Norris Special
« Reply #21 on: 10 November 2020, 08:04:55 am »
Yes, springs are a bit hard to make yourself! I may be having some quarter elliptics made, perhaps multiple set buys might be a bit more economic.

Mark Under

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Re: Frazer Nash Norris Special
« Reply #22 on: 10 November 2020, 08:33:34 pm »
Springs do seem to be an issue,

can anyone advise what size springs work well on the front, width, thickness length would be handy.

I was contemplating having a go at making some springs myself, this might prove tricky though.


StefanN

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Re: Frazer Nash Norris Special
« Reply #23 on: 11 November 2020, 12:23:06 am »

RhysN

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Re: Frazer Nash Norris Special
« Reply #24 on: 11 November 2020, 12:17:57 pm »
Mark, what form of springs do you want to use? I do have a pair of the US made buggy springs for sale, and if it's quarter elliptics, as I said I'm probably having a pair made shortly.

Mark Under

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Re: Frazer Nash Norris Special
« Reply #25 on: 11 November 2020, 09:01:31 pm »
Thanks for the spring info, the sizes in the attached thread give a really good starting point.

I am investigating making some as it is going to get expensive to buy 4 springs.


Mark Under

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Re: Frazer Nash Norris Special
« Reply #26 on: 25 November 2020, 07:15:18 pm »
After a slow couple of weeks due to work commitments I finally got time today to have a go at making some springs for my kart.

The springs are quarter elliptic on the Fraser Nash.

After quite a few failed attempts with some old mild steel flat bar I managed to get a very poorly made jig to bend the eyes with a degree of repeatability.

I then managed to roll 4 springs, 2 fronts and two backs to the same shape using the correct steel.

I think I will make some standard leaf springs with eyes at both ends and some helper leaves to help carry my weight after Xmas!

It was a bit more difficult than I anticipated but I got there in the end.  I am not going to heat treat them until I have them fitted to the chassis as I can still change the radius at the moment.

synthpunk

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Re: Frazer Nash Norris Special
« Reply #27 on: 25 November 2020, 09:58:37 pm »
Wow! Good work!

Applejack

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Re: Frazer Nash Norris Special
« Reply #28 on: 26 November 2020, 08:56:48 am »
BRILLIANT  work ,must be quite rewarding 👍👍.

Mark Under

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Re: Frazer Nash Norris Special
« Reply #29 on: 26 November 2020, 09:04:09 pm »
Thanks for the encouragement guys!  It was rewarding once I got it right, up to that point it was very frustrating!