Jane's All The World Aircraft 1913

GRAHAM-BELL II. Flights were made by Dr. Graham-Bell in a tetrahedal type, similar to one described in the 1911 edition.

Журнал Flight

Flight, February 27, 1909

A Tetrahedral Aeroplane.

  DR. GRAHAM BELL is continuing his experiments at Nova-Scotia, whither he has removed his machines from New York, and last Monday he made the first trials with his tetrahedral apparatus. This contains 3,690 tetrahedral cells, and, including the aeronaut and the 50-h.p. motor, weighs 950 lbs. Unfortunately, very shortly after the machine had risen in the air, the propeller-shaft sheered and the propeller dropped off, but the machine glided slowly down without sustaining any serious damage. The trial was made over the frozen Bras d'Or lake at Baddeck, the aeroplane being mounted upon sledge runners. The machine is known as "Cygnet II," and the operator was Mr. Douglas McCurdy.


Flight, March 20, 1909

Graham-Bell Tetrahedral Machine.

  ON Monday last, Dr. Graham-Bell's tetrahedral aeroplane "Cygnet II" was again tried over the ice at Baddeck, N.S., and although a speed of 15 miles per hour was attained, the machine failed to rise. Dr. Graham-Bell will now overhaul the apparatus and embody one or two improvements which have been worked out as a result of the experiments. It will be remembered that we published some particulars of this machine in our issue of February 27th.