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Meet the new Goodyear blimp -- er, airship

A new blimp comes around only once in a while, and Goodyear slowly replacing its fleet is cause for fanfare. These new airships, as yet unnamed, will fly farther, go faster and carry more people than ever before -- and none of it would be possible without help from the Germans. This newest airship is a collaboration between Goodyear and ZLT Zeppelin Luftschifftechnik -- yes, of that Zeppelin fame -- and the partnership has historical precedent.

Rennsport Reunion IV closes with Porsche 917s tearing around the track

Rennsport IV, three days of serious Porsche love at Mazda Racway Laguna Seca, concluded on Sunday with a half-dozen races around the picturesque track near Monterey, Calif. And while there were a variety of all things Porsche to see and hear through the three days, Sunday saw some of Porsche's most powerful race cars take to the track. It was certainly a case of saving the best for last.

ZF boss thinks 9 speeds is enough for transmissions

The nine-speed transmission might be where the race to add gears ends, ZF Friedrichshafen CEO Stefan Sommer said. He referred to nine speeds as the "natural limit" because going beyond that number adds weight and complexity that cannot be offset by gains in fuel efficiency. "There is no hard line, but you have to consider the law of diminishing returns.