The fine maneuvering qualities of the Army's halftrac scout car depends largely on the tractor belt. The mounting of the… https://www.rawpixel.com/image/12302155/image-person-factory-manFree Image from public domain licenseThe fine maneuvering qualities of the Army's halftrac scout car depends largely on the tractor belt. The mounting of the… https://www.rawpixel.com/image/12302267/image-person-factory-manFree Image from public domain licenseProduction. Pratt and Whitney airplane engines. Cylinder heads for Pratt and Whitney motors are carefully inspected in a… https://www.rawpixel.com/image/12308164/image-face-plant-handFree Image from public domain license