[DeTomaso] speaking of wheels falling off---

Mon Aug 23 11:17:38 EDT 2010

A car is designed to absorb impact in a crash through a 'crush' zone, what you see in the two car head on are both cars deforming and disipating the force of the impact equally as they are designed to do. On the other hand a brick wall is.... well a brick wall and the single car has to abosrb and disipate all the energy so I would expect the two scenarios to be very similar in resulting damage.

Try propelling two bricks (or rigid objects) at each other at 60 mph and see if they react the same as a singel brick propelled at the wall.....

Julian

> From: wkooiman at earthlink.net
> To: detomaso at realbig.com
> Date: Sun, 22 Aug 2010 20:16:54 -0500
> Subject: Re: [DeTomaso] speaking of wheels falling off---
> 
> Slightly off topic, but a head-on collision isn't car1 speed + car2 speed.
> 
> 60mph car head-on with 60mph car isn't like hitting a wall at 120mph. It
> was proven very dramatically on myth busters.
> 
> I believe it's more complicated than that. It's has to do with the total
> force. Car1 speed * car1 weight + car2 speed * car2 weight = total force.
> 
> Force applied to car1 = total force/car1 weight.
> Force applied to car2 = total force/car2 weight.
> 
> It they're both going 60mph and they're both the same weight, it's just like
> they both hit a wall going 60mph. (assuming they head dead-on, glancing
> blows change everything)
> 
> If car1 is 3,000 lbs and car2 is 30,000 lbs (big rig), car1 is going to be
> much worse than head-on, and the 18-wheeler will have much less damage.
> 
> I just made up those formulas, but I bet they're correct or at least close.
> 
> BTW, the wheel that went through the windshield was probably going
> effectively 120mph, simply because the windshield wouldn't have slowed the
> tire down much at all.
> 
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of boyd casey
> Sent: Sunday, August 22, 2010 7:11 PM
> To: Art Stephens
> Cc: JDeRyke at aol.com; detomaso at realbig.com
> Subject: Re: [DeTomaso] speaking of wheels falling off---
> 
> I have heard of several incidents where wheels came off of vehicles and the
> vehicle that lost the wheel did ok but the errant wheel killed the driver of
> the car it hit. This has happened more then once in recent memory. The one I
> remember more clearly the wheel cam e off a car on an interstate and crossed
> the median. As you know the speed in a head on is car +car b + speed of
> impact so a car traveling at 60 mph and a loose wheel traveling at 60 mph
> and bouncing through the windshield and landing smack in someones lap at 120
> mph effective speed, it's not a pretty picture!. When I was in college
> (Loyola in New Orleans) I was driving a VW "Super Bug" from my fathers Ford
> dealerships used car lot when I noticed a VW wheel Passing me on the left!
> The left rear wheel came off and the next thing I knew I was sliding to a
> stop and the wheel was making great time on it's own! Luckily it didn't hit
> anyone. I was always having problems with the cars that I was given to drive
> from the cheapest used car inventory. And every time I had a problem I got
> downgraded to an even cheaper car until finally I was relegated to the
> status of pedestrian!
> Boyd
> 
> On Sun, Aug 22, 2010 at 6:43 PM, Art Stephens
> <artstephens at verizon.net>wrote:
> 
> > When I crashed my car, one of the rear wheels with broken upright, half
> > shaft and disc brake assembly attached, was found days later in a gully
> > about a quarter mile past the car!
> >
> >
> >
> >
> > ----- Original Message -----
> > From: <JDeRyke at aol.com>
> > To: <detomaso at realbig.com>
> > Sent: Sunday, August 22, 2010 12:15 PM
> > Subject: Re: [DeTomaso] speaking of wheels falling off---
> >
> >
> > > I've also had a 'memorable' experience with OTHER PEOPLE'S wheels
> falling
> > > off. Commuting to work one morning in N CA in my modified Corvair, a
> > > cement
> > > pumper truck on its way to a job site broke a rear axle flange off,
> > > freeing a
> > > gigantic 'flotation' tire, wheel & brake drum at 50 mph on the freeway.
> > He
> > > was some ways behind me and I saw the accident in my mirrors, but as
> race
> > > announcers say, in heavy traffic 'I had nowhere to go' except to lean
> > > away.
> > > The 250-lb assembly bounced off guard rails and hit my drivers door a
> > > glancing
> > > blow that knocked the 2500-lb car sideways half a lane, in spite of the
> > > traction from the same size tires I run on the Pantera. The wheel
> finally
> > > stopped in the median-strip Oleander bushes. Lucky me- I was the only
> car
> > > it hit!
> > > The dent in my car was a foot deep but luckily was confined only to the
> > > door.
> > > A gigantic traffic jam occurred between my banged up car and the
> concrete
> > > truck tipped at an angle across 2 lanes. Once he saw I wasn't hurt or
> > > angry,
> > > the truck driver (also the business owner!) was very apologetic but was
> > > MUCH
> > > more worried about the full load of concrete he was to have processed,
> > > rapidly setting up behind us in a second truck (pre-cell phone days). 2
> > > hrs
> > > later I drove the beat up car into work and got no crap about being
> late.
> > > His
> > > business insurance bought me a new door and a full paint job. FWIW- J
> > > DeRyke
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