4 of 9
BACKNEXT
GM's 512-series experimental cars weren't considered safe or fast enough to mix with general car traffic.
In contrast to the Electrovair, GM's 512 Series Urban Cars (the blue, red and yellow cars pictured at right) weren't designed for real roads.

"The three cars, with their 30 to 40 mph top speed and limited acceleration, would operate either on a paved road system of their own or in reserved lanes of existing roads, because they could not mix safely with today's freeway of boulevard traffic," GM said in a 1969 press release.

Each car had a different drive system. The blue car, the 512 Hybrid, was a gasoline-electric hybrid vehicle. The red car was an all-electric car and the yellow car ran on a 12-horsepower 19.6 cubic inch (0.3-liter) two-cylinder engine. The silver three-wheeled car on the far right was the gasoline-powered 511 Commuter Vehicle.

GM featured the cars in a 1969 media event called the "Parade of Power." The show highlighted the automaker's research into various forms of alternative propulsion. Also included were jet-powered cars, a steam-powered Pontaic Grand Prix and an exhibit on "nuclear reactor systems as possible means of powering vehicles."

NEXT: Electrovette

Last updated April 07 2009: 2:19 PM ET
More Galleries
Graffiti about crisis fills Athens' streets Artists are taking to the streets to express their views on the Greek crisis. More
My whirlwind 24 hours in Taiwan as a bridal supermodel Unlike the West, Taiwanese brides-to-be sit for hun sha ?? photo sessions before their actual wedding day. The photos are seen as a status symbol as well as a way to capture the brides' youth and glamor. More
8 startups that'll make your travel experience so much better Here are the new travel apps and services that will make trips easier, less time-consuming, and more fun for the every day business traveler. More

Special Offer