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yodad

Germany
1 Posts

Posted - 09/15/2009 :  13:23:49  Show Profile
ARE THERE ANY COMPETITIONS FOR QUADS THAT USE BOTH ARMS AND LEGGS JUST CURIOUS,I KNOW CURIOSITY KILLED THE CAT AND GOT ADAM AND EVE BANISHED FROM THE GARDEN BUT I HAVE AN IDEA FOR A QUADBIKE AND IT SEEMS LIKE I AM ON MY OWN LITTE PLANET HERE.

budding inventor and a human powered fanatic

SeanCostin

USA
32 Posts

Posted - 09/19/2009 :  17:41:43  Show Profile
I think you could run a quad bike at any Human powered vehicle event. Unless it leans, the velodrome events might be impossible. Quads have run before at these events, but they tend to be infrequent visitors.

Sean Costin
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doseforum

Philippines
1 Posts

Posted - 09/26/2009 :  00:31:41  Show Profile  Visit doseforum's Homepage
and i agree on that...
and as far as i know, there is but it is very rare...


Edited by - doseforum on 09/26/2009 00:31:59
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Trike_Cyclist

USA
3 Posts

Posted - 09/29/2009 :  13:30:29  Show Profile
Unless it leans?? As in something other than a quadbike with a full suspension?
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Jhonabraham

Bangladesh
1 Posts

Posted - 09/30/2009 :  12:59:39  Show Profile
thanks for the links great job.....keep it up man and plz see my sig.

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jero12

Philippines
1 Posts

Posted - 10/17/2009 :  00:08:05  Show Profile
Trike, what do you mean by "Unless it leans?" kindly please clarify it?



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Bent Ben

USA
1 Posts

Posted - 11/08/2009 :  00:20:16  Show Profile
4 wheels are for cars, not bikes.
Trikes have been a proven stable platform for cycling. Why add more gear like a 4th wheel and additional drivetrain bits.
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Don S

USA
85 Posts

Posted - 11/10/2009 :  21:43:05  Show Profile
Non leaning vehicles have a cornering stability index, based on the vehicles mass and location of the center of gravity, beyond which they will skid out or tip over. Any vehicle which can lean into the turn thereby moving it's center of gravity to compensate for the inertial forces may improve it's cornering capability.

A non leaning multi-trac vehicle will not be able to corner at the same speeds a similar leaning vehicle will. Also, because of the location of the center of gravity in relation to a line drawn through the contact patches of the outer wheels, a 4 wheel vehicle with the same trac width, basic mass, and center of gravity, as a 3 wheel vehicle will have better cornering stabilty. If both were leaning vehicles than the skid resistance would likely govern stability and the performance of both would be based on proper location of the CG to suit the vehicle design.

Think of it as being similar to sitting on a 3 legged stool compared to a 4 legged chair and rocking from side to side.

There are a lot of variables but if they are similar between all tires on the vehicles than the weight on the wheel, the angle of inclination, and the location of the vehicle CG will determine the skid properties of a leaning vehicle.

Don

"it's important to understand what makes them fast. It's more important to understand what keeps them from going faster." DS
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playridr

USA
3 Posts

Posted - 12/28/2009 :  08:23:57  Show Profile
Here is a video of my four wheel, full suspension, all terrain vehicle. It climbs great, and you can stop on a hill:

http://www.youtube.com/watch?v=CQAZoJL36w8
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n/a

5 Posts

Posted - 05/26/2010 :  06:05:14  Show Profile
Thanks for starting this thread. I hope it will be helpful to many people that are searching for this topic. Keep posting guys and keep this forum a great place to learn things.

(Non topic related ad link removed. - Moderator)

Edited by - Don S on 10/09/2011 19:49:50
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sandyjohn

China
2 Posts

Posted - 12/29/2012 :  18:12:01  Show Profile  Visit sandyjohn's Homepage
Sean Costin
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