On 2006-10-19, beamendsltd <
[email protected]> wrote:
> It's highly probable that some can, since off-road oriented tyres are
> usually a softer compound than car tyres,
They don't have stipes, they have solid blocks instead, which grip the
road less as the blocks have much less give in them. This of course
refers to mud tyres, not road tyres like ATs. Most ATs will put less
rubber down than a proper road tyre of course, which will lessen grip.
> and, of course, the braking system is designed (on proper 4x4's)
> with towing in mind. The braking ability is designed in, not an
> accidental outcome.
The same is true of cars, which on average are lighter, more
dynamically stable and have a lower centre of gravity so I doubt that
the average car would be out-stopped by the average 4x4.
> A partly loaded 44 ton truck (i.e. loaded enough to stop the
> trailer wheels locking up) will out-stop most cars. Easily.
Naah. HGV braking systems are ****e compared to cars, the government
even paid shedloads of loot some time ago to investigate why this is,
URL below (it's a summary);
http://www.rmd.dft.gov.uk/project.asp?intProjectID=7944
Accidents involving lorries smacking into the back of queues are
pretty common too because of the long stopping distances of lorries,
coupled with lorry drivers not paying attention.
Given however that you've stated that lorries can stop faster than
cars, can you provide any figures? I tried to find some but can't
find anything which was surprising as I thought driver training
information would have something, although it's going to change so
much from one vehicle to the next.
However a dynamically unstable vehicle like a lorry isn't going to
like stopping, the rear tyres for a start are going to lose most of
their grip due to the high centre of gravity shifting the weight so
far forwards. Then there's the load moving, and the ****E tyres
lorries use!
> I'm fooling no one, it's the driver and the pedestrian that makes
> a vehicle dangerous or not,
That's not what I was talking about, it was the bit about being hit by
a car being worse than being hit by a 4x4. On average that's not the
case, although you could of course compare a volvo V90 or whatever
versus an old Jag XJS. Like for like though it's better to be hit as
low as possible.
> The drive train configuration has nothing to do with it (well,
> actually if probably does, but in the 4x4's favour).
Ah yes, having four-wheel drive gives the tyres more grip eh! Hmm....
--
Blast off and strike the evil Bydo empire!