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Re: Stub axle bearings by Slack Alice
20 October 2019, 08:01:54 pm

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20 October 2019, 09:05:04 am

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Stub axle bearings by Slack Alice
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Author Topic: New member Richie  (Read 91 times)

CKGB

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New member Richie
« on: 19 September 2019, 10:44:48 am »
Welcome to Richie.

Please reply to this post and share a little about yourself especially location (not your specific address though!), interest and experience in cycleKarts, any particular skills you might be happy to share...etc

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Richie

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Re: New member Richie
« Reply #1 on: 19 September 2019, 06:50:43 pm »
Hi all,

I have been interested in cyclekarts for a few years after seeing a video online and then I kind of forgot about them as I thought it was a closed event.

I have recently moved house from Northampton to Winslow and I finally have a garage again so it’s time to look for a new project. I have experience making bikes, recumbents and other similar things while I was growing up but now it’s time for something bigger and better.

I am really keen to start planning over the next few months and am looking to start making something next summer really. First I need to pick a car, has anyone done a model T speedster yet?

StefanN

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Re: New member Richie
« Reply #2 on: 20 September 2019, 12:49:25 am »
Hi Richie and welcome.

Dennis Thomas in the USA did a Ford Model T Sprint and you can see his plans here: https://www.cyclekartclub.com/phile/2/309/cyclekart_preliminary_plans_1926_ford_sprint.pdf

Do ask if you have questions.

Thanks
Stefan

Richie

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Re: New member Richie
« Reply #3 on: 20 September 2019, 08:42:43 am »
Hi Stefan,

Thanks so much for finding those plans, they are really amazing!

If I am honest I have never really looked at pre-war cars much. I am good up to about 1960 but after that my knowledge is very lacking. I am looking for some inspiration on what to build and am open to ideas. What would everyone like to see?

Ideally I would like a British car, I came across an Aston Martin Ulster but I don't think I am allowed to build one of those as it was more a street car from what I can see.

I also have some follow up question just about the build and events in general to get me started (apologies if these are very basic/ answered elsewhere)

Are we allowed to use rack and pinion steering? Is anyone doing this?

How many events are there in the UK each year?

What sort of speeds to people achieve?

Has anyone used 3D printing to mold some of the complex shapes? I am thinking of making either ABS components or PLA molds and then fibreglassing over them. I ask as this is technology I am somewhat familiar with. Just wanted to ask if anyone else has tried and what were your experiences?
« Last Edit: 20 September 2019, 08:44:36 am by Richie »

Chris Brown

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Re: New member Richie
« Reply #4 on: 20 September 2019, 09:21:53 am »
There is quite a bit of flexibility in what you can build, not restricted to racing cars. I don't see any problem in your choice of the Aston Martin Ulster, my Morgan is a road car that was (is) raced, same with the Aston Martin.

Rack and pinion is used by some, just a matter of personal choice.

There have been three at Stretton Kart circuit so far this year, and a couple of meet ups elsewhere this year. See the events calendar for next year's plans: http://www.cyclekartsgb.com/events/events-calendar/msg1087.

As fast as you're prepared to drive it, you'll understand once you've driven one, top speed can be up to 45-50 mph.

I'll be getting a 3d printer shortly, with a view to using it to make the difficult bits of bodywork, and other detail bits.

StefanN

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Re: New member Richie
« Reply #5 on: 20 September 2019, 10:20:58 am »
Hi Richie,

I know it's not quite what you asked, but the normal answer to "how fast can they go" is "that's the wrong question".   The first objective is to have fun.  A really common experience is for people to see cyclekarts going around a track and to think "hmm they're not very fast"  and then they get to have a drive of one and they come off the track with an insane smile on their face.

That said, technically there's nothing stopping you designing and building a cyclekart that can do 70mph, but the safety risks will have gone up exponentially, the fun gone out of it etc etc.

Perhaps more usefully is the following info:
The aim is to keep the weight in the region of 100kg or less if you can (mine weighs about 120kg now)
The engine is pretty standard at about 6.5hp and torque of about 12Nm (you can play with the engine to increase the power if you want/need to)
Gearing of the chain drive is typically between 6:1 to 7:1 multiplied by the ratio range of the Torque Converter which is 2.7:1 to 0.9:1
Wheels and tyres give you a combined radius of 250-300mm.

Those factors plus the weight of the driver pretty much determine the performance until you start travelling fast and wind resistance kicks in.

My recommendation would be to build light (certainly lighter than mine!), go more towards the 7:1 end of the ratios and enjoy the fun.  Oh and keep your weight as low as possible.

Marek is building a Delage 15S8 and is planning to use an electric powertrain so that's an alternative route.  I don't think its been done in the UK but in the US people have found that something like a 3kW motor gives good performance.   So, electric is also an option albeit less proven

Chris has answered about the number of meetings in the last year.  I'll only add that the first meet was last September (2018) and things have developed fast in the last 12 months so I suspect we'll have even more going on over the next 12 months.

Re pre-war racing, there's plenty of places to get inspiration.   Brooklands Museum is probably the home of this era and has plenty to see if you're ever nearby, but of course Google will show you 100's of options.  How about an Aston Martin 'Razor' or an Aston Martin Halford Special...honestly, the list is endless.

If you haven't already found them, then watch some of Dennis Thomas's build videos on youTube.

Richie

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Re: New member Richie
« Reply #6 on: 20 September 2019, 11:25:50 am »
Thanks for all of this information.

The reason I asked about the speeds is that my fiancee is concerned I am going to kill myself with another harebrained scheme so it was more a case of assuring here that I wasn't going too fast. I am well aware that relative speeds can really alter things. If you have ever looked at low rider recumbent bicycles they generally maintain a speed of about 25 mph but when your butt is only 3 inches from the floor this seems super crazy fast.

I am starting to understand everything a little more now and draw some ideas together. Lightness is definitely the key to all of this as everything else is pretty fixed.

As you say an electric powertrain is interesting and I have a little experience building electric bicycle before they became an off the shelf thing but there is something nice about the ICE.

So my next question is around chassis design, is there a standard design? e.g. chassis dimensions? I have seen general guidelines to get started but is everyone build different? Where do you get the dimensions for the body work?

I am interested to know that the first meeting was in September 2018 so this is still a very new thing. Where do you see the sport going in the next few years?

edit: I have just had a look at those two Aston Martins that you mention Stefan and they are absolutely perfect! The razor coachwork looks the easiest to build and could be a great starting point for me.
« Last Edit: 20 September 2019, 11:33:49 am by Richie »

Graham Hill

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Re: New member Richie
« Reply #7 on: 20 September 2019, 11:49:48 am »
Hi Richie, welcome and so pleased to understand your enthusiasm.

Please have another look at the 'Start Here' forum if you have not already done so, especially posts 'What is a CK' and 'Additional links'. I think it will help answer a lot of your questions. That's for your help, not to stop you asking questions of course, there are always members happy to respond with assistance. 

There are no standard designs, that's shunned, individuality and innovation is encouraged.

I hope you are also following our Facebook page. CycleKarts GB

Looking forward to meeting up soon. Graham
« Last Edit: 20 September 2019, 11:55:29 am by Graham Hill »

Slack Alice

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Re: New member Richie
« Reply #8 on: 20 September 2019, 07:46:21 pm »
Hi Richie...good to have you on board.  Just to add to Stefan’s post, it is vital that you keep the c of g nice and low!  I have learned this to my cost!!!
I was too fixed on copying the inspiration car and failed to appreciate how unstable these things can be. Dave.

Chris Brown

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Re: New member Richie
« Reply #9 on: 20 September 2019, 07:55:44 pm »

TheGiantTribble

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Re: New member Richie
« Reply #10 on: 20 September 2019, 08:15:56 pm »
Hi Richie and welcome.

To answer a couple of your points...
Chassis design, at it's most basic two 3x1" steel tubes running down the sides of the car.
After that you are limited by your ability to weld and your imagination. Lots have created works of art just with their chassis.
Note though the more steel the more weight.
Distance between rails, (mine is 18" inside edge to inside edge) is mostly governed by what car you chose and your own personal physical dimensions!
Regards speed, at no point have I felt I need more power, I think I'm getting to about 30 - 35mph, I'm to busy hanging on and smiling to take to much notice of actual speed.
There is some talk about having one more event this year at Stretton, if at all possible let me recommend you come along, everyone is only to happy to show how each machine is built and why, and everyone is very good at letting people have a go.

Steve Cole

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Re: New member Richie
« Reply #11 on: 22 September 2019, 08:50:06 am »
Hi Richie, good to have you join us.
As the guys have said, it’s all about having fun
I really enjoyed the challenge of building my Cyclekart and keep tinkering to make it better
Our days we meet up are a blast. Great cheap fun. Stretton circuit is sort of mid country and a 2 - 3 hrs journey for most of us
Try and get along to our next meet and you will come way inspired
Steve

Richie

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Re: New member Richie
« Reply #12 on: 22 September 2019, 09:25:31 am »
Thanks for all the input and the warm welcome!

A plan is definitely starting to form in my head now and I have managed to rope in my brother and best mate too to my plan. I think we are going to try and get to Brooklands in November for some inspiration and a measure up of their Aston Martin Razor Blade.

I have managed to solve a number of my questions on this forum now, enough to make a start at least but I am sure there will be many more. Hopefully between moving house next weekend and everything else that goes with that I will be able to get to the meet up in November to come and have a look at your vehicles.