| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 2C20.00 | Bernoulli Force | | |
| 2C20.05 | hydrodynamic attraction | 17-2.11 | Move a small sphere in water and another in close proximity will move due to hydrodynamic attraction. Pictures. |
| 2C20.10 | Bernoulli tubes | PIRA 500 | |
| 2C20.10 | Bernoulli tubes | 2C20.10 | Air flows through a restricted tube. Manometers show the pressure differences. |
| 2C20.10 | Bernoulli tubes | Fj-1 | Air is blown through a constricted tube and the pressure measured with a manometer. |
| 2C20.10 | Bernoulli tubes | M-12d | A series of manometers measures pressure of flowing air at points along a restricted tube. |
| 2C20.10 | Bernoulli's principle | Disc 13-13 | Three pressure indicating manometers with bright wood floats are located at and on either side of a constriction in a horizontal tube with water flow. |
| 2C20.15 | constriction in pipes | Fj-8 | Open vertical pipes show the drop in pressure as water flows through a constriction. |
| 2C20.15 | Bernoulli tubes | M-294 | Vertical tubes show the pressure as water flows along a restricted tube. |
| 2C20.20 | atomizer | PIRA 500 | |
| 2C20.20 | atomizer | Fj-2 | A jet of air is blown across one end of a "U" tube. |
| 2C20.21 | aspirator, etc. | M-304 | Three demos. 1) Water runs through a 1/2 " dia tube constricted to .1". The dissolved water boils in the constriction. 2) Hook a water faucet aspirator to a mercury manometer. 3) Blow one tube across the end of a second vertical tube dipped in water. |
| 2C20.25 | pitot tube | PIRA 1000 | |
| 2C20.25 | pitot tube | Fj-11 | A small Pitot tube is constructed from glass. |
| 2C20.25 | pitot tube | Disc 13-01 | A pitot tube is connected to a water manometer and the air stream velocity is varied. Graphics. |
| 2C20.26 | venturi meter | M-304 | A manometer measures the pressure difference between the restricted and unrestricted flow in a tube. |
| 2C20.30 | floating ball | PIRA 200 | A ball is suspended in an upward jet of air. |
| 2C20.30 | floating ball | 2C20.30 | A ball is suspended in an upward jet of air. |
| 2C20.30 | floating ball | M-292 | A ping pong ball is supported on a vertical stream of water, air or steam. |
| 2C20.30 | floating ball | M-12b | Float a ball in an air stream. |
| 2C20.30 | floating ball in air jet | Disc 13-04 | A styrofoam ball is suspended in an air jet from a vacuum cleaner. |
| 2C20.31 | floating objects | Fj-9 | Balls, screwdrivers, etc. float in a jet of air. |
| 2C20.33 | oscillating Bernoulli Balls | 17-2.9 | An air jet keeps two balls at the high edge of semicircular tracks. |
| 2C20.35 | funnel and ball | PIRA 200 | Support a ping pong ball by air or water streaming out of an upside-down funnel. |
| 2C20.35 | ball and funnel | 2C20.35 | Air blowing out an inverted funnel will hold up a ball. |
| 2C20.35 | funnel and ball | Fj-4 | A ball will stick in the apex of a funnel hooked to an air supply. |
| 2C20.35 | ball in a funnel | M-293 | A ping pong ball is supported by air or water streaming out of an upside-down funnel. |
| 2C20.36 | ball in a stream of water | PIRA 1000 | |
| 2C20.36 | ball in a stream of water | 2C20.36 | Same as AJP 34(5),445. |
| 2C20.36 | ball in a water stream | AJP 34(5),445 | Drill out a clear plexiglass tube to different diameters, connect water, and show that the ball sits at the change of diameter despite being tipped upside down. |
| 2C20.40 | lifting plate | PIRA 200 | Air blows radially out between two plates, supporting weights hung from the bottom plate. |
| 2C20.40 | lifting plate | 2C20.40 | Air blowing out between two horizontal plates supports a mass. |
| 2C20.40 | lifting plate | Fj-5 | A stream of air flowing radially between two plates will lift the bottom plate. |
| 2C20.40 | suspended plate in air jet | Disc 13-05 | Air blows radially out between two plates, supporting weights hung from the bottom plate. |
| 2C20.41 | lifting plate | M-295 | A pin is stuck through a card and it is inserted into the hole in a wooden spool. Blow in the spool and the card sticks. This can be scaled up if higher air pressure is available. |
| 2C20.41 | lifting plate | M-12c | Blow into a spool and lift a paper with a pin stuck through into the hole in the spool. |
| 2C20.43 | spin out the air | AJP 47(5),450 | When a disc hanging from a spring scale is mounted just above an identical spinning disc, the spring scale will show an increase in force. |
| 2C20.44 | coin in cup | PIRA 1000 | |
| 2C20.44 | blow coin into cup | 2C20.44 | Place a coin in the table a few inches in front of a coffee cup, give a puff, and the coin jumps into the cup. |
| 2C20.45 | attracting sheets | PIRA 500 | |
| 2C20.45 | attracting sheets | 2C20.45 | Blow are between two sheets of aluminum. |
| 2C20.45 | attracting sheets | M-296 | Blow air between two sheets of paper of two large balls and observe the attraction. |
| 2C20.45 | suspended parallel cards | Disc 13-06 | Blow an air stream between two parallel cards on bifilar suspensions. |
| 2C20.46 | sticking paper flap | Fj-6 | A stream of air blown between a paper and a surface will cause the paper to cling to the surface. |
| 2C20.50 | airplane wing | PIRA 1000 | |
| 2C20.50 | airplane wing projection | AJP 28(8),ix | A small cross section of an airplane wing with manometers at various locations is built into a projector assembly. A vacuum cleaner provides the air source. |
| 2C20.50 | wind tunnel | Fl-1 | An airplane wing element in a small wind tunnel shows lift. |
| 2C20.50 | airplane wing | M-302 | A balanced model airplane shows lift when a stream of air is directed onto it. |
| 2C20.51 | airplane wing | M-301 | Hold one edge of a sheet of paper horizontally and let the rest hang. Blow across it and watch the sheet rise. |
| 2C20.52 | airplane wing | M-303 | Connect a slant manometer to holes on the top and bottom of an airfoil. |
| 2C20.53 | raise the roof | 17-2.5 | Air blown over a model house raises the roof. Picture. |
| 2C20.54 | paper dirigible | AJP 44(8),780 | A paper loop in an air stream and a falling card. |
| 2C20.54 | Rayleigh's disk | 17-2.13 | A lightweight disk turns perpendicular to the air flow. |
| 2C20.55 | straight boomerang | AJP 53(6),524 | Make a light straight boomerang from balsa. The theory is different from the usual one. |
| 2C20.55 | boomerang flight | TPT 28(3),142 | An article explaining boomerang flight along with directions for throwing and building one. |
| 2C20.56 | fly wing mechanism | AJP 45(3),303 | How to build a working model of Pringle's fly wing mechanism. |
| 2C20.57 | flying umbrella | AJP 29(7),459 | A motor mounted inside an umbrella is attached to a centrifugal fan mounted above the umbrella pulling air through a hole in the top so it flows down over the side. Develops a few oz of lift. |
| 2C20.58 | dropping wing sections | 17-2.10 | A folded index card, a paper pyramid, or a paper cone are stable when dropped apex down. |
| 2C20.59 | explaining lift | AJP 55(1),50 | Explain lift based on repulsive forces. |
| 2C20.59 | aerodynamic lifting force explained | TPT 28(2),84 | An article explaining that the longer path length does not cause lift. |
| 2C20.59 | aerodynamic lifting force | TPT 28(2),78 | Lift is explained as a reaction force of the airstream pushed down by the airfoil. Several demonstrations are shown. |
| 2C20.60 | curve ball | PIRA 200 | Use a "V" shaped launcher to throw curve balls. |
| 2C20.60 | curve ball | 2C20.60 | A sandpaper covered wood track helps give a ball lots of spin. |
| 2C20.60 | curve ball | TPT 3(7),320 | Throw a 3" polystyrene ball with a "V" shaped launcher lined with emery cloth. |
| 2C20.60 | curved ball trajectory | Fj-3 | A ping pong ball is thrown with a sandpaper covered paddle. |
| 2C20.60 | curve ball | 17-2.12 | A "V" shaped launcher lined with styrofoam is used to launch curved balls. |
| 2C20.60 | autorotation | M-299 | A half round stick used as a propeller will rotate in either direction given a start. |
| 2C20.60 | curve ball | M-297 | A mailing tube lined with sandpaper helps give spin while throwing curve balls. |
| 2C20.60 | curve balls | Disc 13-03 | Throw a styrofoam ball with a throwing tube. Animation. |
| 2C20.61 | spinning ball | 17-2.1 | Direct a high speed stream of air at a ball spinning on a rotating rod free to pivot perpendicular to the air stream. Pictures. |
| 2C20.62 | spinning ball device | 17-2.3 | A device to spin and throw a ping pong ball. Diagrams and details. |
| 2C20.70 | Bjerknes' tube | PIRA 1000 | |
| 2C20.70 | mailing tube | 2C20.70 | Cloth webbing wrapped around a mailing tube is jerked out causing the tube to spin through a loop the loop motion. |
| 2C20.70 | bernoulli loop the loop | Fj-10 | Pulling a cord wrapped around a mailing tube spins it into a loop the loop path. |
| 2C20.70 | Bjerknes' tube | M-298 | Wrap three feet of cloth tape around the middle of a mailing tube and give a jerk. The tube does a loop-the-loop. |
| 2C20.72 | bernoulli cups | AJP 47(2),200 | Glue the rims of two styrofoam cups together and launch by letting them roll off the fingers while throwing. Four glued together works better. |
| 2C20.75 | Bernoulli pen barrel | PIRA 500 | |
| 2C20.75 | pen barrel bernoulli | 2C20.75 | Remove the filler from a ball point pen, place under your thumbs at the edge of the lecture bench. Pop the barrel out from under your thumbs giving it lots of spin. |
| 2C20.80 | Flettner rotator | PIRA 1000 | |
| 2C20.80 | Flettner rotor ship on air track | AJP 55(11),1040 | An aluminum can spun with a battery operated motor (and reversing switch) is mounted on an air track cart. A vacuum cleaner exhaust provides the cross wind. |
| 2C20.80 | Flettner rotator | M-300 | Direct an air stream at a rotating vertical cylinder on a light car. The car will move at right angles to the air stream. |
| 2C20.80 | Flettner rotator | Disc 13-02 | A car with a spinning styrofoam cylinder moves perpendicular to an air stream. Animation. |
| 2C20.85 | Magnus effect | 17-2.4 | Construction details for a very light cylinder and a method of spinning and releasing. Diagram. ALSO - Vertical motorized cylinder on a cart. |