Difficulties of designing propellers with pitch variable in flight; formulas for calculating forces acting at blade root developed; couple perpendicular to plane of bearing which is absorbed by action of balls; value of total torque found to be very high; Ratier Company developed helicoidal thrust bearing; two- and three-bladed wood propellers; details of Ratier propellers; mechanisms for controlling variations in pitch. (Translation) (See also Aeronautique vol. 11, no. 127, Dec. 1929 pp. 407-411, 12 figs.)
Ratier metal propeller of variable pitch in flight
L'helice metallique Ratier a pas variable en vol
1930
9 pages
10 Figs.
Report
English
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Ratier Metal Propeller with Pitch Variable in Flight
NTRS | 1930
|Engineering Index Backfile | 1934
European Patent Office | 2021
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