Harley-Davidson models. In the late summer of 1929, Harley-Davidson introduced its 45 cubic inches (737 cm³) flathead V-Twin to compete with the Indian 101 Scout and the Excelsior Super X. This was the "D" model, produced from 1929 to 1931. Riders of Indian motorcycles derisively referred to this model as the "three cylinder Harley" because the generator was upright and parallel to the front cylinder. The Great Depression began a few months after the introduction of their 45 cubic inch (737 cm³) model. Harley-Davidson's sales fell from 21,000 in 1929 to 3,703 in 1933. Despite this, Harley-Davidson unveiled a new lineup
Harley and the Davidsons of the company archives at the Harley-Davidson Museum, commended the producers' efforts in recreating the motorcycles and the era, saying "they really did their homework", but noted William A. Davidson's reduced role in the story despite the latter being one of the key founders. Harley and the Davidsons Harley and the Davidsons is a 2016 American television miniseries directed by Ciarán Donnelly and Stephen Kay, and co-written by Nick Schenk, Evan Wright and Seth Fisher which dramatizes the origins of motorcycle manufacturer Harley-Davidson, and how Arthur Davidson founded the company together with his brothers Walter Davidson, Sr. and William A.