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Buckling Tests with a Spar-rib Grill

Author: Josef Weinhold

Publisher:

Published: 1940

Total Pages: 30

ISBN-13:

The present report deals with a comparison of mathematically and experimentally defined buckling loads of a spar-rib grill, on the assumption of constant spar section, and infinitely closely spaced ribs with rigidity symmetrical to the grill center. The loads are applied as equal bending moments at both spar ends, as compression in the line connecting the joints, and in the spar center line as the assumedly uniformly distributed spar weight.

Technical Memorandum - National Advisory Committee for Aeronautics

Author:

Publisher:

Published: 1940

Total Pages: 802

ISBN-13:

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Chiefly translations from foreign aeronautical journals.

Some Data on the Static Longitudinal Stability and Control of Airplanes

Author: A. Martinov

Publisher:

Published: 1940

Total Pages: 672

ISBN-13:

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In the solution of a number of problems on the stability and controllability of airplanes, there arises the necessity for knowing the characteristics of the tail surfaces of the types in common use today. Of those characteristics, the most important are the effectiveness and hinge moments of the tail surfaces. As has been shown in the present paper, there exists the possibility of determining these characteristics by the formulas obtained with a degree of accuracy sufficient for the purposes of preliminary computation. These formulas take into account a number of fundamental tail characteristics such as tail cut-outs on the control surface and the form of the control surface leading edge.