A motor-driven aeroplane designed by R. H. Botts. The machine was a combination of a circular aeroplane with two sets of two propellers, the screws of each set working in opposite directions. The aeroplane itself is circular, 20ft diam., and attached to two hoops, the outer of steel tubing and the inner, 6ft diam., of wood. In the centre a bamboo framework supported the boiler, engines, and the car. One set of screws (upper 5ft 1in. and lower 6ft 2in diam.) was placed above the car, and these ran on a vertical axis, the thrust upward in both, though rotating oppositely. Fore and aft of the aeroplane the other propellers, of the fan-wheel type, and 6ft 2in diam., worked on a horizontal axis. There were two engines. A cloth-covered rudder was so pivoted as to be able to be set at any angle either vertical or horizontal.
The airship was intended for the St. Louis competition. Total weight of engines 33 lbs.; of complete apparatus with operator (of weight not stated, 214 lbs).
All Aero 