Long time contributor and engine enthusiast Dick Hamp sent us this picture from an old brochure of an Aermotor 2-1/5 to 5 HP engine featuring the company's patented fluted cooler. Aermotor first built these engine starting in 1911. Of hit-and-miss design, the 2-1/2 HP engines shipped at 600 pounds while the 5 HP engines shipped at 1,000 pounds. Dick Hamp has three of the 5 HP models in his collection.
Dick Hamp is an engine enthusiast living in San Jose, Calif. Contact him via email at: email@example.com.