72 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS … Positive directions of axes and angles (forces and moments) are shown by arrows Moment about axis Angle Velocities Force (parallel Linear to axis) Designa- Positive Sym- Designa- Sym- (compo- symbol Angular bol direction tion tion nent along bol axis) X L rolling >z roll_. Y- 4> XL >x Y M pitch…
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