Early Downforce

["Tom Crain" <tomcrain@gulftel.com>]

It was only a short blip in racing history, disallowed by a rules change =
but Jim Hall's "Vacuum Cleaner" Chapparalls used a small engine driven =
fan together with flexible skirting to suck his cars down to the track.  =
In its short life it proved very effective in allowing higher cornering =
speeds.

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