Big Six

The Big Six is a type of Federal Truck that was introduced in 1926.

Details
The Big Six was introduced as the successor to the previous 4-cylinder engines used in Feds of the time. The Big Six's engine stayed around for an incredibly longtime in the lighter grade models(1/2, 1, 1 1/2, 2-ton, 2 1/2 ton models), but was succeeded early on by diesel engines that offered much more power comparatively. The Big Six name refers to the engine of the trucks themselves, which was a big in-line six cylinder engine that was more powerful and produced much more horsepower than before. Some Big Sixes actually had a worm-drive, but this was likely abandoned early on in favor of a faster, more effecient rear axle. The Big Six was a hit, and boosted sales. It was succeded by diesel engines first, then the V8 engine in the lighter models.