Flight, January 1925
GLIDER COMPETITIONS IN RUSSIA
"Parabola": This glider, constructed by Cheranovsky, is of somewhat unusual design, and it caused no small amount of wonder, not only on the part of the spectators, but the pilot as well, by accomplishing several
good flights up to 1 min. 20 secs, and showing a fiat gliding angle, and rather good controllability. It consists of a single thick-section wing of parabolic plan-form. The pilot sits in a cockpit located within the wing near the leading edge. It has a single wheel, enclosed in a streamline casing, mounted underneath the wing immediately below the pilot. The ailerons which, we believe, extend along the full length of the trailing edge (i.e., the full span), serve, when moved together, as an evelator, and as lateral balancers when moved differentially. A "tail" skid is fitted beneath the vertical rudder. The "Parabola" has a span of 10 m. (32 ft. 10 ins.), a wing area of 20 sq. m. (215-2 sq. ft.) and a net weight of 58 kgs. (127-9 lbs.). The wing loading is 6-5 kgs. per sq. m. (13-3 lbs. per sq. ft.).