Worlds of David Darling
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The crawler-transporter is an immense vehicle, adapted from earth-moving machinery, which carries the Space Shuttle, and previously the Saturn V, on a crawlerway from the Vertical Assembly Building to one or other of launch pads 39A and 39B at Cape Canaveral. The crawler-transporter is 40 meters long and 35 m wide, weighs 2,721 tons, and contains two diesel generators that provide 5,600 hp for the electric drive motor system. It moves on four double-tracked crawlers, with hydraulic jacking pads on 27-m centers. Traveling at a mere 1.5 km/hr, it guzzles fuel at the rate of one liter every 1.6 m (one gallon every 20 feet).

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