zontal rudder was lo- The helicopter, or lifting-screw, type Of flying ma- the cylinder revolve the propellers. Two curved wings, cated in front. A long triangular framework under- connected by a central curved surface, are riveted to chine was represented by a single well-constructed neath… … same plane. It soon fell to the ground after being Weiss's Soaring-Bird Model. One of A. V. Roe's Double-Deck fliers. started on its flight. The photograph shows it at the used to drive a propeller at the rear. One of our il- moment of starting. even to the man in the basket. A small electric motor…
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