Berkhamsted, Hertfordshire, UK: Albatros Productions, 1986. Quarto, staple-bound, illustrated printed wrappers, 20 pp., additional text included on inside of covers, illustrated throughout with black-and-white photographs and diagrams. A fine copy. First edition. Part 1 of the Wind-Sock Datafiles series for aeromodellers and full-scale replica builders, this slim but highly informative..... More