Jaguar's XJ - lie in ads

[Bob DAmato]

At the NYIAS they had a display of the new A8's space frame.  I dont
recall seeing any rivets on it at all, but then again I cant say I
specifically looked either. I did notice threaded bosses that had torx
like bolts in them at certain joints.. maybe this is what they are
calling rivets?
Here are a couple of shots of the space frame.

http://www.audisport.com/gallery/nyas2003/IMG_2158.html
http://www.audisport.com/gallery/nyas2003/IMG_2159.html

Bob

Dave.Eaton wrote:

>*This message was transferred with a trial version of CommuniGate(tm) Pro*
>no, audi developed (and patented) a riveting process which didn't puncture
>the lower layer of aluminium - a self-piercing rivet used particularly for
>where the bodyshell joins to the asf - replacing the requirement to spot
>weld.  the main (asf) joins are produced using various forms of bonding and
>welding.  the riveting technique is reckoned 30% stronger than spot welding,
>and had the additional advantage that it didn't encourage contact corrosion,
>due to the absence of a puncture.
>
>audi has gone with a space frame for the "d" segment cars, while jaguar has
>chosen a monocoque approach.  it is worth noting that the new xj jaguar
>(with aluminium monocque) is only the same torsional rigidity (22,000
>nm/degree) as the outgoing d2 (a8), and the new d3 a8 is substantially
>stiffer than the d2.
>
>it is also worth noting that audi built audi 100-based aluminium monocoques
>prior to the d2, and after extensive investigation (the gestation of the d2
>took 10 years - the final production d2 was the 5th generation car), went
>with the space frame.  when you see a picture of one bare, you realise why
>the d2 has a 5-star crash rating.
>
>dave
>'01 s8
>
>-----Original Message-----
>From: Ti Kan <ti at amb.org>
>Subject: Re: Jaguar's XJ - lie in ads
>Date: Mon, 9 Jun 2003 02:32:25 -0700 (PDT)
>
>Incidentally, I recall reading somewhere that early in the Audi Space
>Frame development program, Audi and Alcoa had experimented with using
>rivets as fasteners for the pieces in the ASF, but for some technical
>reason discarded that method.  The new Jaguar XJ's chassis, on the other
>hand, is predominently tacked together with rivets.
>
>
>
>