STRUCTURAL FLIGHT RESEARCH

THE general history and object of structural flight research is discussed here by Mr. Howland, who compares the importance and future application of this type of testing with static testing and stress analysis.

The author also describes the adaptation of wire resistance strain gages and the equipment used in making flight measurements. He gives a report on a few of the many quantities that have been successfully measured, and discusses some of the difficulties and pitfalls to be encountered.

A stress warning device that was developed for use in flight testing is also described in detail.