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(New page: #Show that air has weight and pressure, using as an improvised barometer, a sauce dish or pan and a tall cylindrical glass of water; (b) explain variations in air due to altitude, and poin...)
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- Show that air has weight and pressure, using as an improvised barometer, a sauce dish or pan and a tall cylindrical glass of water; (b) explain variations in air due to altitude, and point out some resulting problems for engines, for flight path hazards, and for the pilot himself.
- Demonstrate Bernoulli's law that air speed reduces pressure, using a spool and a small card, or a tube and a ping pong ball.
- Build a six-inch airfoil wing section of 5-inch chord and high left cambers, and mount and demonstrate with it the principle of lift; (b) Submit with explainations, a rough diagram used in explaining to another Scout the Aeronauticsd Merit Badge outline of the positive forces of Thrust and Lift and the negative forces of Gravity and Drag.
- Build three drag demonstration airfoils of same cross-section width - cube, cylinder, "streamline" - using a cylindrical oatmeal box, some cardboard, paper and glue; (b) improvise small easy-rolling 4-wheel support to demonstrate air resistance of the airfoils in an air current.
- Build and demonstrate the use of small, simple wind tunnel to provide controlled air current; OR build and demonstrate a simple air speed measuring device.
- Build a rubberband powered flying model airplane of some type new to the builder, and fly in some competition. (Kit may be used.)
- Draw rough side-view outline of monoplane and use in explaining the "angle of attack" (British - angle of incidence); (b) demonstrate why an air stream action enables "control surfaces" to control the direction of the plane; (c) review what stick-and-pedal-action alters which control surfaces.
- Indicate six or more ways for a pilot, about to land, to identify wind direction; (b) explain the relative plus and minus air speed advantages of taking-off and landing into the wind; (c) explain the aerodynamics of stalling.
- Test the relative speeds in an air current of two propellers of approximately the same diameter qnd blade area, but of different pitch; (b) point out the advantages of the modern variable pitch propeller.
| The official source for the information shown in this article or section is:|
Handbook for Boys, 1948 Edition