John,
The intent of the rule is to keep the greenhouse shape intact. An NHRA funny
car has the greenhouse narrowed and shortened, we tried to get away from
that. The window sizes and angles remain the same, we didn't see a problem
here but, maybe missed something?
Dan W
----- Original Message -----
From: John Beckett <landspeedracer@email.msn.com>
To: Dan Warner <dwarner@electrorent.com>
Sent: Wednesday, March 08, 2000 5:36 AM
Subject: chopped tops
> Dan
>
> Was kind of waiting for your reply to John's question, but you may have
> replied to him off list.
>
> I started building a totaly new Comp Coupe last year before the new rule
> book came out. The top was chopped to conform to the rules as of last
year.
> I guess my real question is about windshield angles, basically can the
> windshield angle be laid back (as previous cars have done) under the new
> rules?
>
> Trying to have this new car ready for Aug or Sept but not sure if that
will
> happen this year.
>
> Will early cars be grandfathered?
>
> John Beckett
>
>
>
> > Howdy,
> > Finally got my copy of the 2000 rule book, and I have a question or two
on
> > chopped tops. The rule book says, section IV -7; tops must be widened
and
> > /or lengthened to maintain the stock silhouette of the vehicle.
> > UHHH, whats this mean? I'm running a 1980 Dodge Colt, #3388, H/GCC and I
> > chopped the top in 1991 according to section IV-9; ..contour is
considered
> > to have been preserved as long as the angular relationship of the top to
> > the body proper is not changed. In other words, I cut seven inches off
the
> > door posts, lengthened the windshield posts to meet the original
position
> > of the start of the windshield, (which angled the windshield to 25
> degrees)
> > and moved the top straight down (for the angular relationship
description
> > of the rule)
> > Stock silhouette? Does this mean that the angle of the windshield viewed
> > from the side must remain Stock? with no laydown angle? Or is viewing
from
> > the side considered contour?
> > Or does stock silhouette mean the angle of the sides of the top
> > (windshield posts, door posts) to the body proper, when viewed from the
> > front?
> > Does this mean that I have to increase the width of the top so that, if
I
> > were to cut the stock door and windshield posts off at the final height
of
> > the chopped top, and not bending the posts inwards to meet the top, so
> > that I would have to increase the width of the top to meet the door and
> > windshield posts? I guess I am saying that the stock top is a truncated
> > cone, and in moving the top of the cone downwards, this forces the
angle
> > of the cone to increase, thereby changing the shape of the cone. (hmmm
did
> > that description help or hinder? ) ahhh well, please try to figure out
> what
> > it is I'm saying....I'm rapidly becoming more confused......
> > Thanks,
> >
> > John Robinson, Mechanician
> > Mechanical Engineering University of Wisconsin
> > 1513 University Ave.
> > Madison, Wi. 53706
> > 608-262-3606
> > FAX 608-265-2316
> > Current World Land Speed Record Holder
> > Bonneville Salt Flats
> > H/GCC 92 cu.in. 1980 Dodge Colt
> > 131.333 MPH set 1995
> > 136.666 MPH set 1996
> >
> >
>
>
>
>
>
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