Skip:
There may be some cases of tire failure that are purely a function of overload--
God knows some of our racers manage to load the hell out of them. But you were
the
first one who told me (before I had ever turned a wrench on "the Rose") that
many
of the fastest LSR cars had to deal with about "15% wheelspin". I don't
understand
why you are saying something different now. And based on my own examination
(and,
admittedly marginal expertise)-- I believe that the drive tires on the very fast
lakester pitted near us showed evidence of spinning. There were abrasion marks,
for one thing-- and some cord showing through where the surface had abraded
away.
Abrasion marks come from spinning the tires. There was also a little
blistering,
and bare places where it appeared that blisters had popped-off. As you know,
blisters come from heat. Heat (usually) comes from spinning the tires. We know
that that car seems to have the ability to really load the drive tires-- so
overload may have been a contributing factor (as it may have been in Earl
Wooden's
case)-- but seeing the tire abraded down to the cord suggests to me that the
main
factor is probably wheelspin.
Yes, it would be better to get the opinion of a real expert, rather than just
exchanging opposing hot rodder opinions. Shouldn't be hard to find someone with
sufficient expertise in tire failure modes and post-failure analysis. I
probably
bump into one or two at any CART race I work. Can we get a representative
sample
of (recently) failed tire carcasses? If so, I would be willing to try to
recruit
an appropriate expert to our cause.
There is nothing here that I see as a valid arguement why racers in non-vintage
classes should not be allowed to use TC, if they want to.
Russ
Skip Higginbotham wrote:
> Russ,
> So how about some failure analysis? How can we do that? Others have had
> tire failures that have not gone 300 even....this year....on new tires.
> Excessive loading and load deflection? I think it is a real possibility
> that needs proving or disproving. I think we will find little or no tire
> slippage and yet tires coming apart. How about it?
> Skip
///
/// land-speed@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe land-speed
///
/// or go to http://www.team.net/cgi-bin/majorcool
///
///
|