two Propellers on a Stick

 

Code Number:  10C10.20

Demo Title: Propeller on a Stick - Hand Helicopter

Condition: Excellent

Principle: Bernoulli Force, Lift

Area of Study: Physics

Equipment: Propeller on a Stick

Procedure:

Rub hands together with stick in between them to build up rotation in the propeller.  When you slide your hands far enough, the propeller will automatically release and fly into the air.

References:

  • Said Shakerin, "Helicopter Toy and Lift Estimation", TPT, Vol. 51, #5, May 2013, p. 310.
  • George M. Hopkins, "Inertia of Air", Experimental Science, p. 109 - 112.
  • A. D. Bulman, "13, The Propeller", Model-Making for Physics, p. 73 - 75.
  • R. W. Pohl, "(7)", Physical Principles of Mechanics and Acoustics, p. 210 - 211.
  • Carson I. A. Ritchie, "Orthocopter", Making Scientific Toys, p. 69 - 71.
  • Jodi and Roy McCullough, "Newton's Third Law with a Sky Dancer", The Role of Toys in Teaching Physics, p. 4.70 - 4.71.
  • Robert Ehrlich, "6.9, Propeller on a Stick", Why Toast Lands Jelly-Side Down, p. 109 - 110.
  • Joey Green, "Paper Helicopter", The Mad Scientist Handbook, Vol. 1, p. 65 - 66.
10C10.20 - Propeller on a Stick - Hand Helicopter