[s-cars] Belly pan blues (95 S6A)

[Dave Forgie]

Taka: You are taking this beyond all belief. It was a causual comment
meant to suggest, there are consequences of lift and that the metal
belly pan designers should consider that because I can guarantee that
the plastic belly pan designers did. 

I like said, just use the OE plastic pan. It is well designed and will
be 
proven to be reasonably priced after the aluminum pan design is 
completed and installed. (The is an OPINION)

Dave F.
>>> "Taka Mizutani" <t44tqtro at gmail.com> 01/11/07 11:36AM >>>
Dave-
What is your evidence that a belly pan made of metal would cause
excessive
lift?

At what speeds?

How much lift?

What is the differential between the OEM plastic belly pan's generated
lift/downforce vs. the metal one?

How do you know that lift is even generated and if so, that it is due
to the
belly pan?

Did you or did you not take into consideration the fact that the MBZ
race
car generates downforce?
That said downforce being disrupted by the bumpy road caused excessive
air
to flow underneath the
car, something that apparently was not anticipated?

Audi UrS cars do not generate significant downforce. Your hypothesis
that a
metal belly pan would
cause lift at all, much less lift significant enough to lose control of
the
car is not based on sound
principles.

Taka


On 1/11/07, Dave Forgie <forgied at ae.ca> wrote:
>
> I knew somebody would take exception to my "back flip" hyperbole. 
My
> point was if you go out and reinvent the wheel without the proper
> tools,
> e.g. a wind tunnel, then there could be bad consequences. 
Admittedly,
>
> not as extreme as in my example, but nevertheless, added lift can,
in
> no
> way, be a good thing.
>
> On the Mercedes thing, who do you think said "OH, SH*T!!" first, the
> driver or the engineers?   I think the engineers watching the race
live
> or
> on TV. They would see what was happening earlier than the poor
> driver who was very likely very confused why there was no road noise
> and the steering suddenly became very light while the rev limiter
was
> being hit.
>
> Dave F., P.Eng.
>
> >>> "Taka Mizutani" <t44tqtro at gmail.com> 01/11/07 10:32AM >>>
> I think equating a metal belly pan to the back flip action of the
Benz
> you
> mention
> is a little bit beyond hyperbole and is overly alarmist.
>
> I agree that the OE belly pan is probably the best solution, esp.
> taking
> into account
> cost.
>
> Taka
>