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Post by snailspeed on Feb 24, 2013 9:11:34 GMT
I havnt built a cartie yet but i have wheels on route. Im from the aberdeenshire area. Few questions i have. What harness and seats are folk using. And is having brakes allround realy nessesery. I was thinking about just on the back for ease. Wont be disk brakes yet but will see how it goes first. i work with fibreglass so planing on outer shell with the stuff. And thicker stuff for a floor.
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Post by Scottish Cartie Association on Feb 24, 2013 10:42:45 GMT
Hi Snailspeed. Seats: All sorts of things get pressed into service as seats. Plastic stackable chairs are quit common, but don't offer and side support. Gokart seats are much better and can be picked up quite easily on ebay. I like the Caliba seats designed for corporate gokarts, as they are a bit bigger. See www.calibaperformance.co.uk/Seats/Corporate.htmHarnesses are usually got from ebay too. Get a 5 point racing harness if at all possible. 4 point harnesses are allowed but 5 point is much better. Also - make sure it is properly mounted. Brakes: In my experience a lot of carties with just rear caliper brakes find it very difficult to pass the minimum static brake force test used at a lot of races, especially if they are hand operated. If they are foot operated you can get more force on them so they can usually get by. However, its well worth the effort if you can get brakes on all four wheels. Be careful with your steering geometry and make sure you avoid inducing "brake steering". The current minimum brake requirements in the SCA rules are; For carties up to 50 Kg (without driver): 50KgF For carties between 50 and 75 Kg: 60KgF For carties over 75 Kg: 70KgF Some slower races allow less effective brakes, but if you want to go fast then good brakes are going to be essential.
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Post by snailspeed on Feb 24, 2013 15:38:07 GMT
Note taken about brakes. Just picked up a welder about 30min ago in dundee so not long till i get cracking with it. Is it posable to have a nosie at a cartie from some one in the aberdeen ish area. Or is it secretive
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Post by Scottish Cartie Association on Feb 24, 2013 17:44:30 GMT
I'm sure we can work something out - I'll email you.
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Post by snailspeed on Feb 26, 2013 15:30:07 GMT
How are people making the front steering piviots. Just gokart steering parts. Custom made things ? Iv sorsed a gokart seat but my fat arse wont fit into it so will be a bit of custom work to make it fit not to hard. Steel is ariving tomoro.
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Post by Scottish Cartie Association on Feb 27, 2013 8:58:39 GMT
"gokart" type steering is probably the most common, and pretty easy to set up. I prefer a single rod joining the tow steering arms together with a second rod to the pitman arm on the steering column as it means you can adjust the steering ratio without affecting the amount of toe out/in. It makes it a lot easier to set up.
Car steering racks are becoming more popular. They're readily available from ebay.
You seem to have discovered why I prefer caliba kart seat too - they are a more generously proportioned...
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Post by snailspeed on Feb 27, 2013 10:01:11 GMT
What about how the front wheels piviot. Where king pin ataches. I supose bearings are popular. But what are they from or where to get them. The gokart seat was cheep and ment for a kid but nothing a bit of fibreglass cant sort. Iv repaired 1 or 2 gokart seats before
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Post by gunnerhoots on Feb 27, 2013 20:34:55 GMT
HI everyone, start of the season so heres my twopennyworth. The best bit of info is that ittakes longer to build one of these things by yourself than you would think. Its starts off pretty fast with layout and welding then gradually slows down as the details get in the way I bought a go cart seat on line and had exactly the same problem with size as you've got but as you say a quick attack with a jig saw and then some fibre glass fixed it. Like the other post I bought a standard go cart steering system , not expensive and you can get all the brackets, collars and bearings you need at the same time. I ve got discs on the front and calipers on the back just to make sure I pass the brake tests at the faster events, I would be a right bugger yo drive 7 hours to Annandale and not pass scrutineering. Calipers are easier (IMHO) to set up and cause less trouble but the discs are better at stopping you. The tricky bit is getting BMX wheels with14mm axles and disc brakes, they are available, if not I sorted it by simply bolting a disc (with a spacer) direct to the wheel hub.Thats all for now. Good luck Rick
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Post by Scottish Cartie Association on Feb 27, 2013 21:55:33 GMT
There are a couple of common methods of mounting front wheels. Here's one, based on the method explained on the Fleet Trikes web site. There are no bearings in the tube that the king pin passes through. It's just a snug fit and a load of grease. Another alternative involves the use of a pair of rose joints on each side to make a "virtual kingpin". The nice thing about using rose joints is that you get a certain amount of adjustment in the setup. M12 is about the smallest I'd go for the rose joints.
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Post by snailspeed on Mar 2, 2013 17:04:53 GMT
Whats peoples thoughts on a air brake aswell of normal brakes. Is it allowed. Would it not be smoother for small applying of brakes.
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Post by snailspeed on Mar 2, 2013 17:06:04 GMT
Whats peoples thoughts on a air brake aswell of normal brakes. Is it allowed. Would it not be smoother for small applying of brakes.
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Post by Scottish Cartie Association on Mar 4, 2013 11:09:19 GMT
Air brakes are an interesting idea. There has been at least one cartie with a drag chute for braking after the finish line, and that was very effective at bringing him to a stop. There was a slight problem with it though which caused it to be deployed during the race a few times, which is not really helpful. Of course drage chutes would only be allowed if you were only running one vehicle at a time as you would not want to risk deploying it in into the face of the person behind you. Variable flaps, like aircraft spoilers or air brakes, would only be effective if they were quite large and if you were travelling quite fast. Below about 35mph they are not going to do a lot. However, they do offer a couple of interesting options; 1) They work on the air flow rather than through the tyre contact patch, you can use them without fear of locking up. 2) If you vary the angle of attack you could also generate some downforce that would help in cornering. Nobody has thought to cover their use in any rules I'm aware of, so there is nothing to stop you doing this. However, if any flaps extend out the side of the vehicle you might exceed the maximum width. People might also take a dim view if they think the flaps could be used to block people trying to overtake or interfere with other drivers, so they' would probably have to extend upwards rather than sideways. In any case you should check with the race organisers beforehand as it is always better to try to avoid surprising the scrutineers. The graph below shows what sort of drag you could expect (assuming a flat plate perpendicular to the air flow). It's not much, but it would help a bit if the air brake had enough area and you were going fast enough.
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Post by gunnerhoots on Mar 4, 2013 19:22:52 GMT
I d rather foolishly surmised Snailspeed meant air brakes like you get on artics. Not legal I know but they,d sure as hell stop you at the bottom.........where would you fit the compressor ?
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Post by snailspeed on Mar 4, 2013 20:37:23 GMT
Was more of a pop up air brake than what lorrys use. Though i wod be better to ask. Im all to aware about folk complaning about minor stuff if/when they get beaten
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Post by markymark on Mar 19, 2013 9:47:34 GMT
Hi everyone, novice here, can anyone tell me where to find 2013 event dates please as we are thinking about entering our first event. Just realising how serious everyone takes this but we're up for the challenge. First is to get some dates though, can anyone help?
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Post by Scottish Cartie Association on Mar 19, 2013 11:25:57 GMT
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Post by andy on Mar 19, 2013 12:38:40 GMT
Not everyone takes it serious !!! ........at the end of the day we are out there to have some fun. !!! As you will find when you enter your first event..
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