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Hoff, Wilhelm

Publications and source records attributed to Hoff, Wilhelm.

6 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1942

Contribution to the ideal efficiency of screw propellers

The stipulation of best thrust distribution is applied to the annular elements of the screw propeller with infinitely many blades in frictionless, incompressible flow and an ideal jet propulsion system derived possessing hyperbolic angular velocity distribution along the blade radius and combining the advantage of uniform thrust distribution over the section with minimum slipstream and rotation losses. This system is then compared with a propeller possessing the same angular velocity at all blade elements and the best possible thrust distribution secured by means of an induced efficiency varying uniformly over the radius. Lastly, the case of the lightly loaded propeller also is discussed.

Hoff, Wilhelm↗
NASA NTRS1923

Soaring flight and the Rhon contests

Explanation of soaring flight. Static and dynamic soaring flight. Results of the Rhon contest. Description of the most important gliders. Notes on Soaring Flight Contests in France and England.

Hoff, Wilhelm↗
NASA NTRS1923

Analysis of Stresses in German Airplanes

This report contains an account of the origin of the views and fundamental principles underlying the construction of German airplanes during the war. The report contains a detailed discussion of the aerodynamic principles and their use in determining the strength of airplanes, the analysis of the strength qualities of materials and in the construction, the calculated strength of air flows and a description of tests made in determining the strength of airplanes.

Hoff, Wilhelm↗