I have always wondered why the competition manual for the rotoflex rear
suspension said to convert to the swing spring. Like you, I enjoy the
engineering aspects of suspensions and such. Converting to a swing spring on a
four linked axle suspension like the rotoflex has does not make engineering
sense for this design, as I have understood the engineering. Remember, the
ever popular Jaguar XKE rear suspension and the Corvette rear suspension, both
essentially identical to the rotoflex, do not use a swing spring. Nor do the
competition cars with the same rear suspension. Why Triumph recommended it I
do not understand. Especially in light of their not recommending a rear
anti-sway or anti-roll bar.
It is absolutely true that a swing axle suspension like the Spitfire inherently
has a camber change problem, which includes wheel tuck or jacking, which ever
term you chose to use. But a four linked axle suspension like the XKE or
rotoflex does not have this problem, and cannot have this problem. Therefore,
the fix for a swing axle is not inherently correct for the rotoflex suspension.
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