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JIM SILVERHEELS
Joined: 22 Jul 2006 Posts: 587 Location: United States, Massachusetts, LUDLOW
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Posted: Mon Dec 10, 2012 4:22 pm Post subject: Ever Notice |
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Ever notice the Arrow and Italkart user guides seem to be written by the same author ? If so, wouldn't you think the manufacturer of each kart would write about their own product ?
Always wondered if the chassis's were made by just trial and error or actually designed by mechanical engineers using rhyme and reason.
True story, was at a track where the competitor was on the phone with the manufacturer of it'snewly developed chassis. He was unhappy with the handling and was told by them to cut the front bar in the middle. They did that and it did handle better. The chassis is not being built anymore to my knowledge.
Just been on my mind for awhile. _________________ Don't get stuck in someone else's discarded chewing gum with your thought process. |
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Josh Buttafoco
Joined: 03 Nov 2010 Posts: 126 Location: United States, California, santa rosa
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Posted: Mon Dec 10, 2012 5:13 pm Post subject: |
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Whats your point?
Does a user guide really factor into the quality of the kart? Its all basic theories that you learn yourself through trial and error... in testing.
I am sure chassis are developed through real on track testing... How else would you like to see a design improved?
I saw Italkart had Nacastro running a prototype frame out at Supernats... to me that is awesome. Real ON TRACK testing at one on of the biggest events in the US.
I am not sure why Arrow or Italkart were your choices to pick on here, but their results speak for themselves. |
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Michael Knauf
Joined: 31 Oct 2011 Posts: 58
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Posted: Mon Dec 10, 2012 6:26 pm Post subject: |
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There are no engineers smart enough to design karts. I've been assured this many times
Seriously a lot are not designed by engineers though. And being an engineer myself I can safely say that a lot of stuff is designed by trial and error anyway.
If I've learned anything from observation in racing and about race engineering the best stuff comes from engineers and drivers that can work together as a team... especially when you get up to higher levels, no one person has all the skills to do it all.
Back in the day when things were a bit more grassroots you'd see good stuff coming from guys that knew how to drive, design, and build their own stuff. That is more and more rare these days. _________________ Mike |
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JIM SILVERHEELS
Joined: 22 Jul 2006 Posts: 587 Location: United States, Massachusetts, LUDLOW
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Posted: Mon Dec 10, 2012 6:47 pm Post subject: Josh |
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Josh, not picking on Arrow or Italkart as you might think. Just thought it odd a manufacturer would dole out a user's manual to be written by an outside firm as it appears to be. Just was on my mind.
Mike, that was what I thought, trial and error. Formulas weren't in the design of a kart.
I was told by the European kart dealers that they have the best metals, ya believe it?
BTW have you seen the new design for the multi position cross bar in back of the PCR karts? Saw that in Go Magazine.
Think I'm gonna git my saw out and experiment ! J/K _________________ Don't get stuck in someone else's discarded chewing gum with your thought process. |
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Joey Guyon
Joined: 09 Aug 2001 Posts: 529 Location: Canada, Not USA, Calgary
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Posted: Mon Dec 10, 2012 7:45 pm Post subject: |
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Why get your saw out when you can buy a kart that's designed to allow you to move that bar?
The kart is very good. We ran it 3 times this year in Rotax on Mojo tires at National events.
Canadian Nationals: Qual 8, Heats: 2, 5, 5, Pre-final:2, Final: 6
Western Canadian Championship (skipped round 1/2): 3-2nd, 4-th, 5-1st, 6-1st
Have yet to test it on MG White... driver is in College now so have limited time to race - let alone test.
Seems to be best on mid to high grip tracks that flow (with Mojo anyhow).
Main rails are 28mm. |
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JIM SILVERHEELS
Joined: 22 Jul 2006 Posts: 587 Location: United States, Massachusetts, LUDLOW
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Posted: Mon Dec 10, 2012 8:00 pm Post subject: Joe |
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Joe, karts same price for you Canucks as in the States? _________________ Don't get stuck in someone else's discarded chewing gum with your thought process. |
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Chris Livengood
Joined: 24 Jul 2001 Posts: 2432 Location: United States, Pennsylvania, Da Burgh
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Michael Knauf
Joined: 31 Oct 2011 Posts: 58
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Posted: Tue Dec 11, 2012 7:03 am Post subject: Re: Josh |
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| JIM SILVERHEELS wrote: |
Mike, that was what I thought, trial and error. Formulas weren't in the design of a kart.
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Even when you use formulas and physics it is still a bit of trial and error, at least at some stages. You sometimes make assumptions or guesses and iterate to get close to the answer you want.
Many people don't really get that math based engineering and test based engineering are really the same processes. The only difference is how well you trust your math model or how well you trust your test setup. In fact the only real way to engineer anything effectively in my mind is to use both. Models allow you to do quicker iterations than full scale tests, and full scale tests usually show you more than a model, and if done properly, give good, hard data. All that is useless if it is not precise enough or not repeatable. _________________ Mike |
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Joey Guyon
Joined: 09 Aug 2001 Posts: 529 Location: Canada, Not USA, Calgary
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Posted: Tue Dec 11, 2012 8:22 am Post subject: |
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There are very few sane people here as you know Chris. Get me that Maranello chassis from a few years back and a Sodi futura. That should give me some winter projects  |
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Ihor Bilyy
Joined: 13 Jul 2005 Posts: 536 Location: United States, Georgia, Canton
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Posted: Tue Dec 11, 2012 10:54 am Post subject: |
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| If you want to see engineering approach to chassis, google for book "Kart Chassis Setup Theory and Practical Guide". The only book if this kind. |
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