Flying Display And Exhibition On Opens Today At Farborough Hants -- The air striking force of the future, Delta wing aircraft manufactured by the A.V. Roe Company seen in flight over Farnborough, The leading Vulcan is powered by Olympus Jet engine, the second by Armstrong-Siddley Sapphire Jets. The four delta-wing research aircraft are A.V. Roe type 707 A. (two) 707 B. and 707 C. Large crowds today attended the 1953 Flying Display and Exhibition, showing the products of members of the Society of