Wanna spend $65k for a trike? - Page 8

 

3fc8aaac02d1@p3g2000pra.googlegroups.com:


  Again with the mistunderstanding that slicks are slick because of the
"more surface area makes more friction" thing...

  Y'all just don't get it, do ya?  It doesn't matter how much surface
area you put on a tyre under a vehicle, you will *NOT* increase the total
friction between that vehicle and the ground without either increasing
the weight of the vehicle or decreasing the hardness of the tyres.

  Tyres on road racing vehicles are treadless because the compounds they
run are so much softer than normal treaded tyres.  The increased surface
area of the slicks distribute the total friction over a much larger area
thereby allowing the tyres to last longer.

  Given two tyres made of the same compound, putting a larger slicked
tyre in place of a smaller treaded tyre does absolutely *NOTHING* to
increase the friction between the tyre and the road.

--
RCOS #7
IBA# 11465
http://imagesdesavions.com

 


We just love it when you make up your own answers that have nothing to
do with what someone else actually said, and then point out why your
own made-up answers are stupid in your opinion.

Maybe if you just read what was actually written down instead of
projecting your fondest wishes and desires about what you *wish*
someone else had said you'd be a bit better off?

Or maybe you could at least Google "Straw-Man Argument"?

 

ae446826c1cd@g1g2000pre.googlegroups.com:


  So I made a typo.  You know damn well I meant "slicks are sticky".  Now
do go fuck off and die a slow horrible death.

--
RCOS #7
IBA# 11465
http://imagesdesavions.com

 

| J. Clarke wrote:
| > So tell us what's different about a rubber tire on a paved surface and
| > show us some evidence to back that assertion.
|
| OK.  Why doesn't a top fuel dragster use a tire 3" wide?  It would support
| the weight, and it would work just as well according to your contention
that
| rubber tires work exactly like all other materials.
|

A dragster does not rely on friction alone. If it did, none could exceed a
'G' of acceleration and last I looke they were doing some 3x that. The
dragstrip surface is coated with rubber from previous runs.  They tell me
that a dragster actually melts/welds this and the surface of its own tires
together to exceed the "stick" provided by friction alone, allowing the car
far more than one 'G' of acceleration. The heat would completely melt
skinnier tires.

On more normal concrete or asphalt roads, tires dig into road irregularities
and get a "gearing" action; allowing them more than a 'G' of lateral
acceleration.  The softer the rubber, the more gearing, but the weaker the
tread surface. Too weak and the "gear teeth" brake off and the tire slides
instead of "drifting". Wider is stronger but has more rolling resistance.
Racers choose a compound for max traction based on track surface and temps
and the rest of us must balance traction and tire life. Tread temperature
has a big role and is controlled by initial pressure.  It is a mix of
science and magic.

 

On 17/03/2010 16:26, Vito wrote:


Are you suggesting that coefficients of friction never exceed 1?
And if so, should we believe anything else you have to say?

--
Eiron.