UK Karting - Notice Board (General Karting) : davidmc

Notice Board (General Karting)

davidmc
Posted by 'MrvanEs' on 15 Feb 2010 @ 17:03

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MrvanEsJoined: December 2006
Total Posts: 1
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Rear wheel lift is a function of front end geometry, admittedly. But if the waist of the chassis was made from newspaper, the rear wheel would not lift owing to the ridiculous softness of the chassis rails. That's a stupid example, I know, but what I'm trying to say is - there's more than one thing that affects dynamics of a kart.

Using an example relating to racing cars is completely irrelevant however, owing to the fact that race cars have suspension and various other components that karts do not have. For example, all race cars run negative camber on the front wheels. So why is it that karts don't? Either run pretty much central or even positive camber! This is because suspension affects the way the front tyres work. With suspension, the wheel is able to lean when cornering, on a kart it is the sidewall of the tyre that acts as the suspension, so when cornering the outer sidewall becomes shorter, and the inside one taller, owing to the loading of the tyre. This ensure maximum contact between tyre and track.

The driver is the one component of the kart that makes the largest difference when driving, leaning outward when cornering can drastically change the dynamics of the kart.

Seat stays alter the way the kart flexes. If you alter the position the load is being transferred to, the way it flexes will also be altered.

To think about it in terms of moments, imagine a crane. Might not be relevant, but if you change the pivot point, the counter-balance weights must also be altered otherwise there is an imbalance. By connecting the top of the seat directly to the rear bearings, you alter the pivot point of the chassis flex.

And in answer to your last question - no. I take it you mean accelerating in a straight line anyhow. This much is obvious, as there is no load in the kart when it is travelling in a straight line. If you mean when accelerating whilst cornering then yes. This is the whole idea - it changes the dynamics of the kart when cornering.

I can only imagine the reason people run two seat stays on the non-engine side is to counteract the effect of the engine weight/engine clamps on stiffness/weight of that rear corner.

This is all theorectial, however. You can talk about the logic behind karting for ever. But the easier way to do things is to get out on the track and test it.

Why not just go and do that? I have very recently, developing a new kart and all. It makes a significant difference, I'll promise you that.

Will

Message Thread:

when to use seat stays by 'winger93' (14 Feb 2010 @ 22:51)

Re: when to use seat stays by 'QuickOldTimer' (15 Feb 2010 @ 9:16)

Re: when to use seat stays by 'Ballhatchet' (15 Feb 2010 @ 9:30)

Re: when to use seat stays by 'QuickOldTimer' (15 Feb 2010 @ 9:45)

Re: when to use seat stays by 'Ditch' (15 Feb 2010 @ 10:06)

Re: when to use seat stays by 'alanrr' (15 Feb 2010 @ 11:26)

Re: when to use seat stays by 'QuickOldTimer' (15 Feb 2010 @ 11:38)

Re: when to use seat stays by 'GillardKid' (15 Feb 2010 @ 12:22)

Re: when to use seat stays by 'QuickOldTimer' (15 Feb 2010 @ 12:40)

QuickOldTimer by 'MrvanEs' (15 Feb 2010 @ 14:50)

Dave, do you ever get fed up with...... by 'alanrr' (15 Feb 2010 @ 15:36)

Re: Dave, do you ever get fed up with...... by 'QuickOldTimer' (15 Feb 2010 @ 16:06)

Re: Dave, do you ever get fed up with...... by 'alanrr' (15 Feb 2010 @ 17:13)

Re: QuickOldTimer by 'davidmc' (15 Feb 2010 @ 15:47)

davidmc by 'MrvanEs' << You are here!

Re: davidmc by 'Traxtar' (15 Feb 2010 @ 17:20)

Traxtar... by 'MrvanEs' (15 Feb 2010 @ 17:54)

Re: davidmc by 'vizard' (15 Feb 2010 @ 17:21)

Re: Seat Stays by 'QuickOldTimer' (15 Feb 2010 @ 18:45)

Re: Seat Stays by 'QuickOldTimer' (15 Feb 2010 @ 19:04)

Re: davidmc by 'davidmc' (15 Feb 2010 @ 17:54)

Re: davidmc by 'deangwigan' (16 Feb 2010 @ 10:26)

Re: davidmc by 'SimonS' (17 Feb 2010 @ 9:56)

Re: davidmc by 'BanzaiBoy' (17 Feb 2010 @ 13:39)

Anyone fancy answering 1509's question on.... by 'alanrr' (17 Feb 2010 @ 14:15)

Re: Anyone fancy answering 1509's question on.... by 'PaulGarnerTKM' (17 Feb 2010 @ 17:21)

Thank goodness! by 'alanrr' (15 Feb 2010 @ 18:24)

Re: Thank goodness! by 'Traxtar' (15 Feb 2010 @ 20:16)

Re: Thank goodness! by 'drewdt3' (15 Feb 2010 @ 20:49)

Re: Thank goodness! by 'QuickOldTimer' (15 Feb 2010 @ 20:52)

Oh good! The Chuckle Brothers spotted... by 'alanrr' (15 Feb 2010 @ 21:55)

Shucks! Was one of them SEAT STAYS? (nt) by 'alanrr' (16 Feb 2010 @ 0:33)

The thing is, how come the two EXPERTS..... by 'alanrr' (16 Feb 2010 @ 0:38)

Slick sticker kit maybe helps you win? (nt) by 'alanrr' (16 Feb 2010 @ 0:44)

It's your name on the kart, ain'it? Yeahhhhhhhh! by 'alanrr' (16 Feb 2010 @ 0:48)

I'm off to bed, what time do they unlock you? by 'alanrr' (16 Feb 2010 @ 0:53)

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