Aircraft Engineering and Aerospace Technology: Volume 7 Issue 12

Trimming and Balancing Devices: Some Thoughts on What Is, or Is Not, a Tab

IT is remarkable how even in these days quite an important device can creep into common use practically ”unbeknownst,“ and become a regular feature almost as soon as it has first…

Magnesium Alloys in Aeroplanes: The Properties, Methods of Treatment and Uses of an Interesting Material

E.R. Gadd

ONE of the primary considerations in the design of high performance aircraft is the attainment of a high power/weight ratio for the unloaded machine, while at the same time…

Trimming and Balance Tabs: The Principles, Advantages and Disadvantages of Small‐Chord Flaps on Control Surfaces

J.E. Serby

DURING the past year or so there has been a growing tendency towards the use of small servo flaps on elevators and rudders either for trimming or for balancing. The object of this…

The “Allowable Boost Ratio”: A New Method of Knock Rating for Aviation Fuels of High Anti‐Knock Value

G.D. Boerlage, L.A. Peletier, J.L. Tops

THE fact that the anti‐knock rating of aviation fuels in octane numbers presents difficulties, especially above 80 octane, has led us to develop a more suitable test method for…

Maintenance of Electrical Equipment: A Complete Guide for Prospective Ground Engineers Studying for an “X” Licence

W.E. Crook

THE electric current is often compared, especially in “ popular ” works, to the flow of water in a pipe. This conception holds good in certain respects, but is definitely…

Stressed‐Skin Structures: New Formulae for Calculating the Stability of a Monocoque in Compression

J. Lockwood Taylor

ONE of the outstanding problems in design of stressed‐skin structures is that of ensuring adequate rigidity to guard against instability failure or buckling of the parts of the…

Air Ministry Contracts: A List of Orders Placed during the Month of September

The following list of contracts placed by the Air Ministry during September is extracted from the October issue of The Ministry of Labour Gazette

Research Reports and Memoranda

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Committee, Reports and Technical Notes of the U.S. National Advisory…

Month in the Patent Office: A Selection of the More Important Aircraft and Engine Specifications Published Recently

A gyroscopic control system for aeroplanes and other dirigible objects comprises (1) a pendulous gyroscope having its centre of gravity below the roll axis of the aeroplane, and…