Why 1950s LeTourneau Tournapull Scrapers Still Move More Dirt Per Hour Than Modern Scrapers LeTourneau Tournapull scrapers from the 1950s used electric wheel drive systems powered by diesel generators, eliminating transmissions and providing infinite speed control for optimal productivity. These machines featured the revolutionary "electric wheel" with traction motors built into each wheel hub, allowing precise control of cutting depth and travel speed. The Tournapull's telescoping bowl system and electric drive enabled faster cycle times than mechanically-driven scrapers. During WWII, LeTourneau provided 70% of Allied earthmoving equipment, proving the reliability of electric drive systems. Modern scrapers use complex hydraulic systems, electronic controls, and emissions equipment that frequently malfunction, reducing productivity and requiring specialized technicians for repairs that field mechanics could easily handle on vintage electric-drive machines.