tech' ed'

[wilsonralph]

i am searching for the plan, drawings, for how to make a whirligig. it is the type you would hold and spin in your hand, like a helicopter blade, that would take flight. made out of wood, and shaped to present bernoulli's priniple.

[thebestteacher]

are you doing it with your kids

[wilsonralph]

<font face="Verdana, Helvetica" size="2">Originally posted by thebestteacher:
are you doing it with your kids</font>

yes, i am. i have already made one from scratch. it elevates vertically thanks to critical balancing, but a more precise control of how the students should shape the blades would be helpful. bernoulli stated his principle, but i have read about some doubts. such as, airplanes should not be able to fly inverted. any help to offer would be appreciated as i plan to segue into more complicated principles of flight and trans'

thank you,
ralph