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Messages - Seven racer

Pages: [1] 2 3 ... 6
Build journals / Re: Bédélia
« on: 14 May 2022, 09:08:43 am »
I'm glad you have reverted to the original front axle design,  don't let it worry you, fortune favours the brave.

If you build the front end with the thought that you may have to change the layout if things don't go to plan it won't be an irrevocable decision,  i.e. allowing for retro fitting other axle mounts etc.

But if it worked for the real one you have a good chance it will work for you, and will make a fantastic and unique cyclekart. Good luck with the build I look forward to seeing the build.


Tech Forum / Re: Reverse
« on: 06 May 2022, 08:45:34 pm »
Wow Peter, thats a very impressive set-up youve got  8)

I think Gemini sell the reverse boxes, but I got mine from Ebay. If you are interested it's worth putting it on a watch list, or in your basket, and leaving it alone. You quite often get a follow up offer of a lower price. I think I paid less than £120 for mine.
 This is the sort of thing



Tech Forum / Re: Reverse
« on: 06 May 2022, 07:31:53 pm »
I'm  aiming to use a reverse gearbox, not only does it provide reverse, but it takes the drive down 1.3 to 1, so I should be able to use a smaller rear gear wheel.

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It's a bit of an extravagance,  but I'm invoking the 'fun' rule.


Build journals / Re: ANOTHER AUSTIN 7 TWIN CAM
« on: 19 April 2022, 09:00:53 pm »
Definitely following this one with interest! Look forward to getting onto the track with two or 3 of these, to see the various solutions to arriving at a similar end point.

In the meantime I will be poring over your drawing notes to compare sizes! Keep us up to date with the build.


Tech Forum / Re: Pedals
« on: 17 April 2022, 10:32:00 am »
Thanks Rhys, I wasn't sure if there was a need to wind the TAV up while still braking.


Tech Forum / Pedals
« on: 17 April 2022, 08:59:47 am »
Many years ago I spent a day karting at an indoor venue, when we came out I roared off down the road on the industrial complex and came to a sharp left turn. No problem, a quarter turn on the steering wheel.....and nothing happened, no problem, quick dab with my left foot on the brake...... nothing happened as it just disengaged the clutch.

Which brings me to my point, there seems to be a convention that cyclekarts also go with the right foot, and stop with the left, when in real life cars go and stop with the right foot.

Is this because you need to both brake and accelerate a cyclekart at the same time?  or just convention? and if so, could you not just do both with the same foot, as with changing down with a crash box while braking?

The reason I ask is that I'm just looking at pedal placement, and as an automatic driver I would prefer to have the status quo of my left foot sitting doing nothing all the time. Otherwise, being a senile old git, I'm likely to bin the car at the first road junction when I leave a meeting :)


Build journals / Re: 1936 Austin 7 twin cam racer
« on: 15 April 2022, 03:29:55 pm »
I have done a few uploads of the build diaries since the last post, firstly almost a year ago, I had to resolve the issues of nowhere to build, nowhere to store, and no means to transport a cyclekart,


and I'm happy to report that the solutions to build and storage appear to have been sorted

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Next up was to see if I could fit in such a small car,


And then I finally pushed the button on some frivolous purchases to get some commitment.


And it's almost a year to the day that I have finally built one of those purchases into the nosecone.

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Things are starting to move on the cyclekart now, with pretty much all of the front end resolved and getting assembled for the last time before I can get a rolling chassis tested.

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And don't get upset about the Suzuki 600 in the front, it's only for a dummy engine!


Build journals / Re: Inspiration Kart needed!
« on: 14 April 2022, 10:52:17 pm »
Knowing your fondness for hanging out the back of Edwardian cars with a degree of 'presence' how about this?



Tech Forum / Re: BACK TO SQUARE ONE!
« on: 12 April 2022, 07:31:42 pm »
I doubt I will be going to Stoneleigh this year Ian, the 355 is getting a full rebuild, and I still haven't got the engine sorted in the trike. There does seem to be lot off similarity in the various Seven builds, I also started my looking at a Morgan, but decided it was a bit too similar to the JZR.

Our third 'team' member Chris Loader also has a 250 GTO replica..

I think I'm starting slightly larger than you with my build, the drawings were done to 80%  scale, but I suspect I will still need to do a bit of tweaking from the cockpit backwards, which is why I'm getting the front end sorted first, and working backwards to fit around me. I did wonder about smaller wheels with big tyres, but in the end decided that the outer diameter wasn't far off. - I do fancy the twin rears that they used for hillclimb but I'm not sure what sort of problems that would cause when I got to the first corner.....


Tech Forum / Re: Changing the 'Pick-up' rpm on a centrifugal clutch
« on: 12 April 2022, 07:39:05 am »
I'm not sure what type of clutch you are using Adrian, but this may be of help if it's the same internals.


If it's got separate springs the aim is presumably to get them to engage later, so you either need to lighten the weights, or upgrade the springs.


Tech Forum / Re: BACK TO SQUARE ONE!
« on: 11 April 2022, 09:56:30 pm »
Looking forward to seeing this one Ian, I  think that's now three twin cams in construction in the UK, so we have a Works Team!

The only observation that I have, (from bitter experience!), is that it's really tight, both in cockpit and engine space, so you might need to stretch the width a bit here and there.

Talk to Chris Loader about Gemini front axles, he has had a straight one made by them for his.

And if you need any particular pictures of close up details etc. just shout, Gaydon is almost on my doorstep, and where the two survivors are on show.

Here's where I'm at currently

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Good luck with the build,

Where to get stuff / Re: is your car body skinned in aluminium?
« on: 03 April 2022, 10:45:08 am »
For flat panels, and ones with single curvature I'm using second hand Dibond, a sign making material. It's a composite of two thin aluminium layers which sandwich a plastic core. I have 2mm and 3mm, and if you can find it second hand,  it's cheap. 

I paid about £35 for two 8 x 4 sheets, but I did have to drive 70 miles to Nottingham to collect them.

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The only problem I have found with it so far is the inability to put louvres in it,

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so I am going to have to resort to some sort of fakery.


Build journals / Re: 1936 Austin 7 twin cam racer
« on: 23 March 2022, 01:17:42 pm »
Week 3 May 2021
having established that I was going to build a cyclekart, I'm showing how I got the full sized plans sorted. Being a model maker first, and cyclekart builder second, means I have some conflict, as I want to make a scale model of my inspirational car, but I know I won't then fit in it, so there will have to be compromise, but hopefully not too much.



Where to get stuff / Re: Steering quick release
« on: 16 March 2022, 03:09:37 pm »
If it's of any use, the one I bought is the push button release that I bought from Ebay, for about £12, it seems to do the job well, with a 3/4" shaft socket, which works o.k. when welded to a 19mm steering tube.

Wheel fixings are 5/16" UNC, which is the only anachronism on a metric kart, but I'm happy with it.

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Build journals / Re: 1936 Austin 7 twin cam racer
« on: 16 March 2022, 02:50:19 pm »
Having done a brief Introduction and idea of who I am, and where I'm coming from last week,


I am introducing my 'Inspirational car' this week. If you do nothing else check out the Austin Motors footage from 1936 at about 14 minutes in, it's well worth a watch.



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