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>> Even by modern standards, the T3 is quite stiff, especially in >> torsion. The Type 3 has a torsion stiffness of a bit over 15,000 >> ft-lbs/deg and a bending stiffness of between 20,000 and 30,000 lbs/in. >> The best modern production cars have torsional stiffness of between >> 16,000 and 18,000 ft-lbs/deg. 10,000 ft-lbs/deg is more typical. >> Bending stiffnesses of modern cars can be higher with a range of values >> between 20,000 and 80,000 lbs/in. > >I assume you're talking about torsion stiffness about a fore and aft axis, but >which bending plane is this? Is there only one that is important? > Yes, it is the torsional stiffness about the longitudinal axis (fore/aft). In Type 3 terms it is the twist about the central tunnel. As for the bending, it is the bending of that same axis in the vertical direction that I was referencing. This is the most important bending mode since it is typically the lowest frequency, is excited by typical road loads, and is felt most by the driver. Later, John Jaranson '71 FI AT Fasty (Jane - Darkside Project) '66 Square (Sophy - Daily Driver) About Half a Late Square (Organ Donor) http://mywebpages.comcast.net/jaransonT3/jaransonT3/ http://mywebpages.comcast.net/jaransonT3/notavwclub/ ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org