<VV> Belt issues

[Bob Gilbert]

Hi,
Reminds of many computer system designs I worked with over 40 plus years.
Time after time, the FINAL, FINAL set of system requirements were signed off
by everybody short of the Almighty and sure enough and 1 week before
deployment some VIP walks up and says: "BTW, please add this change"!
Actually they rarely said please....
Regards,
Bob


-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of BobHelt at aol.com
Sent: March-11-13 2:29 PM
To: vairologist at cox.net; virtualvairs at corvair.org
Subject: Re: <VV> Belt issues

Also, please remember that this unnamed engineer (Bob Benzinger, Chevrolet
engine engineer) stated that the original design called for an automatic
transmission ONLY, and NO MANUAL TRANNY. Then, he said, that at the last
minute  marketing realized their mistake and ordered a manual transmission
to also be  included at the introduction of the Corvair. That would tell you
that all the  early testing was with a 2-speed PG that was NOT LIKELY to
have belt problems.  When the MT got added a whole new set of belt
conditions appeared (at the last  moment).
Regards,
Bob Helt
 
 
In a message dated 3/11/2013 2:08:55 P.M. US Mountain Standard Time,
vairologist at cox.net writes:

Smitty  Says;  Bob I know others will remember this.  We had a guest speaker
engineer at one of the conventions that had been asked about the  belt
problem.  He said yes we knew we had a problem.  We were  locked in on
engine design and could not change that.  All we could do  was try to make
the belt survive.  The belt company engineers provided  several different
designs
which all failed under extreme conditions.   They finally came up with a
killer belt that did not fail in all their  testing.  They put it on the
engine with all us Chevy engineers  standing around.  They revved the engine
hard and put it through all  kinds of acceleration and deceleration.  Then
they stepped back and  smiled............. Till one of the Coevair engineers
reached over and  grabbed the throttle and immediately flipped the belt off.
They knew just  exactly what to do to make it happen.
I can tell you from experience that  if you autocross on a fast track and
down shift and dump the clutch on it,  you are likely to lose the belt.
Spike has been run on a dozen road courses  and still has the same belt
after
8-9 years, but I heel and toe the  downshifts.  My other cars use the same
no=name belts that last for  years, but I guarantee you on my wagon (110
engine, 60 fan, PG) I can snap  one in half without moving the car.  That
has to be brutally hard on  the damper and bearings so I don't do that to
prove I can, even on a  bet.
So the answer is, again.  Yes they knew they had a problem.   They answered
it with the best belt they could provide, but even that  wasn't idiot proof.
If anybodys Corvair throws belts while being normally  driven, there is a
problem with pullys or component alignment.  The  engineering was done and
it works for the guy they designed it  for.

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