CycleKarts GB

Forums => Build journals => Topic started by: Little French on 01 September 2019, 10:03:14 am

Title: US Vintage Kart Co French Style
Post by: Little French on 01 September 2019, 10:03:14 am
Hello everyone,

Some pictures of my 3rd toy !

[attachimg=1]

[attachimg=2]

[attachimg=3]
Title: Re: US Vintage Kart Co French Style
Post by: roger on 01 September 2019, 10:14:41 am
looks great roger
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 01 September 2019, 01:03:59 pm
Hello everyone,

1st real release this morning!

[attachimg=1]

[attachimg=2]

[attachimg=3]
Title: Re: US Vintage Kart Co French Style
Post by: TheGiantTribble on 02 September 2019, 08:00:14 am
Well the chassis is a work of art in it's own right...beautiful work.
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 02 September 2019, 09:07:19 am
Hi TheGiantTribble

Thank you very much, I try to do my best....
Title: Re: US Vintage Kart Co French Style
Post by: Slack Alice on 02 September 2019, 10:58:47 am
Hi Little French....thatís some chassis!  If the steering rack is anything like the one I used, you should put it in the bin straight away! It is rubbish. Dave.
Title: Re: US Vintage Kart Co French Style
Post by: Graham Hill on 02 September 2019, 12:48:48 pm
Dave. Gemini (it's about time I asked for a discount) sell the racks that they fit to their own off-road karts. I had a look at one the last time I was there, they have never had a problem with any apparently. 360 degree turn lock to lock on the unfixed rack.... this may be too slow for circuits such as Stretton?
In the meantime does anybody know where I can get hold of some steel disks 16gauge, about 50mm diameter, I need about 100? 🙄
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 02 September 2019, 01:57:59 pm
Hi Little French....thatís some chassis!  If the steering rack is anything like the one I used, you should put it in the bin straight away! It is rubbish. Dave.

Hi Alice

Thank you for the warning!
In fact, I think to modify this rack!
I bought this cheap thing to keep the items interesting (pinion, rack, ball joints and tie rods Right and Left, steering column and gimbals) I think to manufacture the central part as my last rack made at home.


[attachimg=1]
Title: Re: US Vintage Kart Co French Style
Post by: Slack Alice on 02 September 2019, 08:53:07 pm
That new rack you have shown is interesting. I am going to make a new Ďboxí to house the pinion gear. Exactly how, I donít know yet! I do have a lathe but no milling machine. Any tips on how I may go about it?
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 03 September 2019, 09:23:12 am
I made mine with a metal lathe only
the plan is some pictures from us

http://www.cyclekart-fr.com/forum/index.php?page=post&ids=5621
Title: Re: US Vintage Kart Co French Style
Post by: Slack Alice on 10 September 2019, 07:29:22 pm
Iíve modified my steering rack today. Put sone lathe turned bushes either side of the steel plate I put on last month! And, made a steel bush to support the other end of the pinion spindle. There was nothing to support it before, now a steel bush fits into the end cap and supports the nut (!) lovely and firm now.
Thanks for your drawings, Little French., but beyond my capabilities!
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 11 September 2019, 08:42:54 am
Hi Alice,
Thanks for these informations !
I have not worked on changes to mine yet, But when I would have done that, I would tell you about it...
Currently, I finish the "bathtub" to position the steering column, the bearing, the seat and the steering wheel.

Soon
Fabrice
Title: Re: US Vintage Kart Co French Style
Post by: RhysN on 12 September 2019, 12:25:33 am
That's nothing like a VKC chassis Fabrice. It's 10000% nicer.
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 12 September 2019, 02:26:39 pm
Hi Rhys,

The chassis Vintage Kart Co was impossible to achieve
No laser machine for cutting Alu and no welding machine Alu either ....
So I made an "approach" to the French, But the overall dimensions are similar.
For moral or ethical reasons, I did not want to make an "exact" copy that would not have been correct on my part ...
This is also why I named my post "CK US with French style"
I have good relations with our American friends and I would like to continue ....

Fabrice
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 12 October 2019, 06:33:38 pm
Hello Guys,

Some News !

Title: Re: US Vintage Kart Co French Style
Post by: Slack Alice on 12 October 2019, 09:23:42 pm
Hi Fabrice...looking good!   I came across one of your posts on the US site regarding your use of plastic/nylon bushes to produce a free wheel.
Can you provide some more info on this method?  I currently have two wheels driven but am considering only one driven wheel.
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 13 October 2019, 08:21:43 am
Hi Alice,

Yes, the 2 driving wheels is not the best configuration ! I used this solution to my first CK but I had a lot of trouble when cornering....
At first, I simply deleted a key on a wheel
This simple solution gave me a good result, the steering was nice but less symmetrical
With two-wheel drive turns are difficult but the behavior is neutral, with a single drive wheel, turns are nice but the car becomes less neutral
Moreover, in turns "against" the free wheel there is more motor, hence my idea of isque "limited slip"
Be careful, this disc is not nylon but polyacetal or PEHD 500
I tighten the ring until I can not turn the wheel by hand
Thus, the wheel is still a little drive and a little braked and the car found a little neutrality, this concept is not "miraculous" but it works better than a wheel too free which gives asymmetrical effects in control....
I hope my Googlish is understandable enough to explain my idea ....

Fabrice
Title: Re: US Vintage Kart Co French Style
Post by: Slack Alice on 14 October 2019, 09:42:52 am
Thanks Fabrice, I like the idea. Iíve made several changes to my kart ( to lower the C of G ) so am going to see what effect these changes have on the performance before altering the drive. Probably a winter job!  It will mean moving the bearing to the inside of the chassis to make room for friction discs etc.Thanks, Dave.
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 21 November 2019, 08:18:03 am
Hi,

Some news !

Title: Re: US Vintage Kart Co French Style
Post by: TheGiantTribble on 21 November 2019, 09:13:34 am
Loving the look of the dash board.
Build quality as ever, excellent.
Title: Re: US Vintage Kart Co French Style
Post by: StefanN on 21 November 2019, 09:24:52 am
Looking good.   Nice looking workshop too!

Is the figurine 3D printed?
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 22 November 2019, 09:27:27 am
Thank you for the comments
For the mascot, yes it is a 3D printing, and I have to do a metal painting....
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 25 January 2020, 04:51:24 pm
Hello all,

My method for tracing body panels, I use polycarbonate from 0.8 to 1.00mm also called "Multiglass"
More expensive than paper or cardboard, but much more precise.
Some pictures maybe more comprehensive than my bad English ....

Soon
Fabrice
Title: Re: US Vintage Kart Co French Style
Post by: StefanN on 27 January 2020, 12:13:46 am
Thatís an helpful idea Fabrice.   How do you transfer the pattern from the plastic sheet to the paper?
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 27 January 2020, 08:50:12 am
Hi Stefan,

I do not transfer plastic to paper, but plastic to Alu sheet directly
In fact the plastic panel is almost the exact size of the sheet metal panel
For the exterior layout, I go around the panel with the pencil, and for the rivet lines, I extend my lines on the Alu, a bit like a pattern in the seam .....
I could even if I need, drill the holes for the rivets, if some places had to be specific ...
To make it simpler, the plastic panel is a true copy of the Alu panel (same size, same thickness)

Photos 5 and 6 show the Alu panel, not paper

Soon
Fabrice
Title: Re: US Vintage Kart Co French Style
Post by: StefanN on 27 January 2020, 09:29:13 am
Ah! I thought it was paper and didn't understand the need for that step.  Thanks S
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 28 February 2020, 08:18:29 am
Much less beautiful than Jim's work, another small piece of sheet metal laid !
Title: Re: US Vintage Kart Co French Style
Post by: jim on 29 February 2020, 11:42:00 am
That looks excellent and a much better finish than mine. I have gone for the good from afar but far from good look.  ;D
Title: Re: US Vintage Kart Co French Style
Post by: Little French on 01 March 2020, 07:46:17 am
Hummmm,  I think you are a joker !!  ;D ;D
I am very far from doing a good job .....