crossmember update (more pics..)

[ralexander03@snet.net (Rick Alexander)]

Toby,

Please send the links to your pictures for those of us who have lost them.

Thanks,

Rick Alexander

----- Original Message -----
From: "T. Reed" <treed2@u.washington.edu>
To: "Scott F. Williams" <sfwilliams@comcast.net>
Cc: "Allyn" <amalventano@sc.rr.com>; <scirocco-l@scirocco.org>
Sent: Tuesday, March 04, 2003 12:14 AM
Subject: RE: crossmember update (more pics..)


> Shite. Looks like I made a pretty big incorrect assumption.
>
> Well, I will have to reevaluate this whole project next weekend. I still
> think the bar offers some benefit, but maybe I need to tie it in somewhere
> else. Who knows..
>
> -Toby
>
> On Mon, 3 Mar 2003, Scott F. Williams wrote:
>
> > Toby:
> >
> > a) Start your car.
> > b) Pop your hood.
> > c) Yank the throttle cable.
> > d) Note the direction of engine rotation.
> >
> > -CLOCKWISE! That is, under torque, the movement against the front motor
> > mount is *upwards*. :^)
> > --
> > Scott F. Williams
> > NJ Scirocco nut
> > '99 Subaru Impreza 2.5 RS
> > Mazda 323 GTX turbo "assaulted" vehicle
> > Golf GTI 16v "rollycar"
> > ClubVAC: "Roads found. Drivers wanted."
> >
> > -----Original Message-----
> > From: scirocco-l-admin@scirocco.org
> > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of T. Reed
> > Sent: Monday, March 03, 2003 11:31 PM
> > To: Allyn
> > Cc: scirocco-l@scirocco.org
> > Subject: Re: crossmember update (more pics..)
> >
> >
> > Al,
> >
> > I'm afraid I don't understand. When you step on the gas the engine
twists
> > axially around the side motor mounts, in the same direction as the
wheels.
> > If you sit on the drivers side of the car looking at the driver side
wheel
> > it is turning counterclockwise when the car is going forward. When you
> > accelerate, it turns counterclockwise harder and pushes down on the
front
> > motor mount. The front motor mount is tied in to the crossmember bar, so
> > the force vector points straight down.
> >
> > Perhaps you're thinking that the placement of the inner cv joint
relative
> > to the axis of rotation at the side motor mounts would make the engine
> > twist the opposite direction as the wheels. If this were the case, why
is
> > my crossmember cracked on the bottom rather than the top? Tension causes
> > cracking, not compression (or at least it takes a great deal more
> > compression to crack sheet metal in general)
> >
> > Could you clarify your statement?
> >
> > Thanks,
> >
> > -Toby
> >
> > On Mon, 3 Mar 2003, Allyn wrote:
> >
> > > > First of all, the force vector acting on the crossmember points
straight
> > > > down.
> > >
> > > umm, during a downshift perhaps, but the major load is in the upward
> > > direction, during acceleration. i think this makes your whole
explination
> > > backwards (as far as tensile/compressive stresses), but it will work
just
> > > the same.
> > > Al
> > >
> > >
> >
> >
> >
> > _______________________________________________
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> >
> >
> >
>
>
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