LETTER OF SUBMITTAL

To the Congress of the United States:

In compliance with the provisions of the act of March 3, 1915, establishing the National Advisory Committee for Aeronautics, I submit herewith the seventeenth annual report of the committee for the fiscal year ended June 30, 1931.

It is noted from the committee's report that the progress in aerodynamic development has been gratifying and that with recent notable additions to equipment the committee now has excellent facilities for the conduct of full-scale research on airplanes, propellers, and seaplane floats and hulls.

Attention is invited to Part V of the report presenting a summary of progress in the technical development of aircraft. With the steady improvement in the performance of aircraft, the relative importance of aviation increases as an agency of transportation and of national defense. I concur in the committee's opinion that the continuous prosecution of scientific research will provide the best assurance of further progress in the development of aircraft for all purposes.

THE WHITE HOUSE,

December 11, 1931.

HERBERT HOOVER.