Aerodynamics - Forces Acting On An Airfoil

Aerodynamics - Forces Acting On An Airfoil Signal Corps 23:00:11 Smoke & animated diagrams show air moving over objects. Illustration of barrage balloon w/ wind moving over & under it; relative wind of air or balloon. 23:01:02 Airstream & its effect or force showing the lift & draft when around or against a fixed plate. Lift is right angle to the relative wind while drag is in the same direction. 23:02:03 Angle of attack of relative wind shown; airfoil forms illustrated. 23:04:11 Cutaway of wind tunnel; placement of model for testing purposes. Placement of scales to measure forces exerted & method shown. 23:06:28 Photographs of large wind tunnel & its elements at Wright Field shown. 23:07:21 Algebraic equations to measure lift, drag & other forces shown. Wing shown w/ measuring points. 22:11:38 Manometer explained w/ animated drawings of pressure exerted or removed from changing reservoir levels of tube(s). Reading of level to measure pressure. 23:13:37 Tubes run to reference points in airfoil (wing) to record effect of lift & drag at the points. 23:14:55 Men, technicians or engineers, in ties & vests installing model airfoil into wind tunnel by wires & connected to pressure gauges / gages. 23:16:36 Control panel & starting motors driving large fans of wind tunnel. Fans turning. Wing section tested seen; manometer tubes showing fluctuating levels. Photograph measured. 23:17:52 Diagrams of wind pressure on airfoil plotted. 23:22:23 Airfoil at rest. Air pressure by relative wind at angle of incidence explained. 23:24:09 Training plane taking off overhead; in flight. Diagram showing effect of angle of attack as plane put into dive. Physics; Mathematics; Didactic lecture; Boring Tone of Voice; Boredom; Educational Films; WWII Instructional Films; Any continuous ten minutes sold at per reel rate.