Blackbushe Aviation Research Group , Naval Aviation Research Section, 3rd ed., May 1975. 42 pp., photo-ills., + ills. Soft c.c., 30 x 21cm. FINE. The Wyvern, designed originally as a fast torpedo reconnaissance bomber to fill the gap left by the passing of the Barracuda and Avenger, was a unique aircraft. This detailed and illustrated history of the Westland Wyvern filled a long gap in naval air history. SCARCE.