THE ROLE OF THE AIRSCREW Available to Purchase

WE have thought it worth while to devote a considerable amount of space in this and the preceding issues to translations of a scries of articles by members of the staff of the Zurich airscrew firm, Escher Wyss, which have appeared during the past twelve months or so in the Swiss technical periodical, Flugwehr und Technik. We have from time to time in the past published, from the same source, descriptions of this type of airscrew, which was one of the earliest of the variable pitch airscrews to be produced, and the principles on which its design was based.