Quote:
Originally Posted by aerohead
Hi Jim.Tumblehome is used by automakers to describe inward leaning of the cars greenhouse sides,beginning at the beltline (bottom of greenhouse).
If you stand behind today's HONDA Fit and look at the A,B,C,and D-pillars,you notice that each consecutive pillar is leaning in towards the center of the car a bit steeper.This would be the 'morphing',as the sides of the car are integrated into more of a body of revolution type of architecture.
If done correctly,the velocity of airstreams from top and sides will meet at similar velocity,preventing the formation of high-drag longitudinal vortices.
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Found a Fit today over in the Lowes lot while looking for grill block parts
NOW I see what you are talking about. Stand behind the Fit and the morphing into a better transom shape is very apparent. When I got home I stood behind my Gen 1 Insight and decided that the Insight had done a much better job, but of course they didn't make nearly as many compromises. Now you are making me want to put some tell tails on the corners of the rear to see which way the flow is going.
Do you think the Insight is cursed with the longitudial vortices at the upper corners of the rear (i.e. the corners of the tail lights)?