Patented biplane configuration as invented by William Whitney Christmas (U.S. Patent 957,744 Flying machine, patented May 10, 1910), constructed by the Christmas Aeroplane Co. of Washington, DC. This version was fitted with a 6-cylinder 75 hp Roberts motor, photographed after making practice flights in the hands of Clinton O. Hadley at a height of 500 feet.
All Aero 