А так:
http://www.f1db.com/car/part/chassis/id/11218 ?
Кажется,я понял,в чём заковыка...Как утверждает
http://8w.forix.com/sixwheelers.html :"
And so, in November 1981, at a cool but sunny Paul Ricard, Keke Rosberg climbed aboard the six-wheeled FW07 hack, which for reference purposes we shall call the FW07E, as its reported name (“FW07D”) later became the designation for the regular 1982 FW07. "