Mack AC

The Mack AC was a heavy cargo truck that Mack Trucks introduced in 1916 to replace its older Senior model. Designed under chief engineer Edward Hewitt, it was offered in three payload classes and was powered by a four-cylinder petrol engine driving the rear wheels by chain. It was built in great numbers for the United States and British armies during the First World War, and British soldiers who relied on its tough, blunt-nosed build nicknamed it the Bulldog, a name that led Mack to adopt the bulldog as its corporate emblem in 1922. Production lasted until 1938, with just over 40,000 ACs built, and the chassis also served as the basis for the AK, AP and AL variants and for many early fire engines.