Page 2 of 2 FirstFirst 12
Results 16 to 21 of 21

Thread: Coming to a track near you, seat belts and roll bars

  1. #16
    Join Date
    7th September 2008 - 18:48
    Bike
    2008 Yamaha YZ250
    Location
    Hamilton
    Posts
    1,076
    Quote Originally Posted by scott411 View Post
    i disagree with the irs causing more roll overs, i ride both types often and there is very little difference, however quads are getting faster, 10 years ago the biggest quad made was a 500 and most people still ran 300's, now quads are up to 800cc and most people are on 400cc or bigger,

    totally agree with roll bars being worse, having ridden quads with them i hate them, you need to be able to get away from a quad when it goes, and a roll bar prevents that,

    as for the suggestion of the harder side walls, it is a good plan, but it takes away the traction that the people need form them,
    yeap, nothing could beat a honda big red 300.

    when i was on a farm we had a yamaha 350 and a 400 with independent rear... perhaps it was just that model but it liked to roll. Or maybe the suspension gives you a false sense of security as its hugging the ground, and when it does go its too late to do anything but jump out of the way. Never had any close calls on the 350.

    Great quads though, i had the 400 bouncing down a hill and all i bent was the rear carrier

  2. #17
    Join Date
    3rd April 2010 - 16:22
    Bike
    2000 Aprilia RSV Mille,
    Location
    ChCh
    Posts
    896
    Quote Originally Posted by scott411 View Post
    as for the suggestion of the harder side walls, it is a good plan, but it takes away the traction that the people need form them,
    Oh I know why they're fitted...
    And I know that lowering the pressure helps enormously at the expense of stability and safety.

    So now we're between a rock and a hard place.
    ACC want to rid the world of anything dangerous
    The Polly's won't ban quads but want to back ACC.

    What happens now is that highly opinionated and ill informed media will conduct 'investigations' until the NEXT BIG THING catches their interest. The fuss will die down until the next time there is a paucity of news and the story will get dusted off. Repeat ad nauseum

    http://www.dailymail.co.uk/news/arti...AL-menace.html
    http://www.anorak.co.uk/scare-stories/

  3. #18
    Join Date
    28th November 2007 - 13:41
    Bike
    2008 CRF450, CBR900RR, 125 Pit bike
    Location
    Hamilton
    Posts
    733
    who cares learning the hard way is the best way, or am i to old school for this politicly correct world.

  4. #19
    Join Date
    7th June 2006 - 17:03
    Bike
    1912 Grindley Peerless
    Location
    Auckland
    Posts
    186
    Quote Originally Posted by schrodingers cat View Post
    http://en.wikipedia.org/wiki/Rollover

    Vehicles usually roll over due to one of several mechanisms. These are excessive cornering, tripping, collision with another vehicle or object, or traversing a critical slope.

    Excessive cornering rollovers occur when cornering forces destabilize the vehicle. As a vehicle rounds a corner, three forces act on it: tire forces, inertial effects, and gravity. The cornering forces from the tire push the vehicle towards the center of the curve. This force acts at ground level. The force of inertia acts horizontally through the vehicle's center of mass in the direction opposite to the one it is turning. These two forces make the vehicle roll towards the outside of the curve. The force of the vehicle's weight acts downward through the center of mass in the opposite direction. When the tire and inertial forces are enough to overcome the force of gravity, the vehicle starts to turn over. Most passenger vehicles will slide or spin before this happens, but this is a common type of rollover for taller vehicles, including light trucks (SUVs, vans and pickup trucks), busses and heavy trucks.

    Tripping rollovers occur when a vehicle is sliding sideways, and the tires strike a curb, dig into soft ground, suddenly regain traction, or a similar event occurs that results in a sudden lateral force. The physics are similar to cornering rollovers.

    A collision with another vehicle or object can cause a rollover. These occur when the collision causes the vehicle to become unstable, such as when a narrow object causes one side of the vehicle to accelerate upwards, but not the other, causing the vehicle to rotate along its long axis. A side impact can accelerate a vehicle sideways. The tires resist the change, and the coupled forces rotate the vehicle.

    A rollover can also occur as a vehicle crosses a ditch or slope rather than a flat road surface. Slopes that are steeper than one unit vertically for every three units horizontally are termed 'critical slopes' and often contribute to rollovers.


    Do you just copy this stuff straight off wiki? Everyone knows what makes stuff fall over, i fall over when i drink too much.
    We're not stupid.

  5. #20
    Join Date
    3rd April 2010 - 16:22
    Bike
    2000 Aprilia RSV Mille,
    Location
    ChCh
    Posts
    896
    Quote Originally Posted by Expert View Post
    Do you just copy this stuff straight off wiki? Everyone knows what makes stuff fall over, i fall over when i drink too much.
    We're not stupid.
    Actually a lot of people couldn't explain why something falls over. I agree you're not stupid just narrow

  6. #21
    Join Date
    18th August 2008 - 20:41
    Bike
    KTM exc
    Location
    auckland
    Posts
    407
    According to the Department of Labour most of the accidents are riders under 16 and most deaths were riders w/o helmets
    We wear them on a mountain bike or a dirtbike but cant get into the habit on a farmquad!
    I'm as guilty as the rest

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •