OT Car crash Physics...

[roclist@accessconsulting.ca (Jason Adams)]

I think it was like an old virago (350cc I think)


Jason Adams
Fahrvergnugen Forever! ;)
84 rocco 16v
93 320i
98 Z71

----- Original Message -----
From: <JoshuaA.Conner@VerizonWireless.com>
To: <roclist@accessconsulting.ca>; <scirocco-l@scirocco.org>;
<jason@scirocco.org>; <scirocco-Al@insight.rr.com>
Sent: Monday, October 28, 2002 2:35 PM
Subject: RE: OT Car crash Physics...


> What is the make on that yamaha? FZR400?  360Lbs with oil, gas and liqiud
> cooling?
>
> Joshua Conner
> Customer Care
> Verizon Wireless
> Dublin, Ohio
> CoolJ@Vtext.com
>
>
> -----Original Message-----
> From: Jason Adams [mailto:roclist@accessconsulting.ca]
> Sent: Monday, October 28, 2002 5:34 PM
> To: 0sciroccolist; Jason; Scirocco-Al
> Subject: Re: OT Car crash Physics...
>
>
> M1 is Jaguar XJS curb weight 4808lbs driver 165lbs ---> 2260kg
> M2 is Yamaha Motorcycle 360lbs + 125lbs ----->220kg
>
> Jaguar is stationary (waiting to turn left) and is struck by motorcycle
> headlong in the pass front fender.
>
> Front of car is displaced 8 feet (2.44m) back remains stationary,
wheelbase
> is 102" (2.59m)
>
> uK is a coefficient I found on the net.
>
> I want to calculate the inital velocity of the motorcycle.
>
> and no the motorcycle driver isn't doing so well....
>
>
>
> Jason Adams
> Fahrvergnugen Forever! ;)
> 84 rocco 16v
> 93 320i
> 98 Z71
>
>
>
> ----- Original Message -----
> From: "Jason" <jason@scirocco.org>
> To: "Jason Adams" <roclist@accessconsulting.ca>; "0sciroccolist"
> <scirocco-l@scirocco.org>
> Sent: Monday, October 28, 2002 1:42 PM
> Subject: Re: OT Car crash Physics...
>
>
> > At 03:57 PM 10/28/2002, Jason Adams wrote:
> > >With all the wealth of informed people on the list this shouldn't be
too
> > >difficult...
> > >
> > >If I know the weight of the cars, the skid distance, assume complete
> > >inelastic collision. how do I work it out...
> >
> > I'm confused here -- what are you trying to work out?
> >
> > >Vf^2 = Vo^2 + 2a(dS)
> > >
> > >is there something wrong with my assumption for 'a' ?
> >
> > Well, uK isn't a constant... the value you use is a "typical" value.
> Every
> > tire is different, as is every road surface.  And stopping distances on
a
> > car aren't that easy to compute -- you're dealing with 4 tires on an
> object
> > that has suspension and that does not have even weight distribution.
> >
> > "Typical" deceleration for a modern automobile is between 8.5 and 10
> > ms^-2.   Of course, some are far below, and a few are above.
> >
> > Using the 3 braking distance figures I have for the 16V from magazines
> (60,
> > 80mph from Road & Track, 70mph from Car & Driver), we can compute the
> > average a for the 16v's braking:
> >
> > 60mph   150 feet        7.87g
> > 70mph   196 feet        8.19g
> > 80mph   257 feet        8.16g
> >
> > The average of those 3 stops is 8.08g.  The 8V (158 feet from 60, 271
feet
> > from 80), averaged 7.61g.
> >
> > Of course, modern tires and brake pads improve those distances:  Two
years
> > ago I did 10 consecutive stops from 60 in my16V with Potenza RE71 tires
> and
> > Ferodo pads and used my G-Tech Pro to measure the distance.  I discarded
3
> > runs where the G-Tech did not provide an accurate reading, which left me
> > with 7 good runs.  I discarded the best and the worst runs, leaving 5
> > total.  The average of those 5 runs was 131.8 feet, which is an average
of
> > 8.95g.
> >
> > Jason
> >
> >
> >
> >
> >
> >
> >
>
>
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