Flying Display And Exhibit On Opens Today At Farnborugh 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 Valcan is powered by Olympus Jet engines 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 1955 flying Display and Exhilbition, showing the products of members of the Society of Br