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Author Topic: Frazer Nash Norris Special  (Read 1322 times)

Mark Under

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Re: Frazer Nash Norris Special
« Reply #30 on: 12 December 2020, 10:47:12 pm »
I got a bit of time in the workshop today and managed to get the front axle mocked up, can anyone give me an idea of a suitable maximum steering angle, at the moment the front wheel turns about 35 degrees before it hits the leaf spring.  I’m not sure if this is enough?

jim

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Re: Frazer Nash Norris Special
« Reply #31 on: 13 December 2020, 07:44:12 am »
looking good there Mark. From the photo it looks like plenty of steering angle.

RhysN

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Re: Frazer Nash Norris Special
« Reply #32 on: 13 December 2020, 10:48:44 am »
Personally I'd say that's way more than enough. I would be restricting it back from there!

Mark Under

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Re: Frazer Nash Norris Special
« Reply #33 on: 13 December 2020, 05:48:30 pm »
Thanks, for some reason it didn’t look enough on the bench.

I will get it welded up this week.

Marek.Z.N

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Re: Frazer Nash Norris Special
« Reply #34 on: 14 December 2020, 04:29:12 pm »
Looks perfect to me. Plenty of steering is useful especially in the wet if you get the back a bit to wide out!

Mark Under

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Re: Frazer Nash Norris Special
« Reply #35 on: 11 July 2021, 07:18:44 pm »
After two house moves and then having to move our business unexpectedly I have finally managed to spend a day in the workshop assembling some of the parts.

Hopefully I will be able to get some more workshop time soon.

RhysN

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Re: Frazer Nash Norris Special
« Reply #36 on: 11 July 2021, 08:41:05 pm »
Looking grand!

Marek.Z.N

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Re: Frazer Nash Norris Special
« Reply #37 on: 12 July 2021, 07:55:01 am »
Indeed! looks great

StefanN

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Re: Frazer Nash Norris Special
« Reply #38 on: 13 July 2021, 10:11:20 am »
Looking good.  You’ll have it driving in no time!

Mark Under

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Re: Frazer Nash Norris Special
« Reply #39 on: 13 July 2021, 11:06:40 pm »
Thanks for the kind comments,

Hoping to get it running by the end of August, seems to take awhile though.  The diff turned out to be a pain as the shafts are 1 inch and everything else is 25mm so all the hubs etc needed reaming in the lathe to fit.

I need to finish the front axle next!


jim

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Re: Frazer Nash Norris Special
« Reply #40 on: 14 July 2021, 06:23:42 am »
Looks real good there Mark.
 Is the lay shaft there so you can get the drive ratios you want without having big sprockets and allowing the seat back to be closer to the rear axle?
The diff should give you very nice handling in tight corners. I'm glad I fitted one to my kart.

Mark Under

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Re: Frazer Nash Norris Special
« Reply #41 on: 14 July 2021, 07:15:17 am »
Jim

Yes I put a lay shaft in to help keep the sprocket small but mainly so it’s very easy to achieve a much greater range of gear ratios. 

With the sprockets I have it is currently set to 7.5-1  not including the Torque converter but by changing one small sprocket I can get anything from 6-1 up to 10-1

Obviously not having finished the kart I have no idea what the best gear ratio is but I know from using Honda engines at work they like to run at the top end.