This is a 3D-printed "whirly-bird" toy that was designed by Jian Song, an ASFG sophomore. The toy flies like a helicopter when the vertical axle is given a sufficient angular velocity by the sliding the palms of the hands together in opposite directions (see video). Jian is currently working on modifying the toy blades to a standard NACA airfoil design so that the lift provided by the rotating blades will include two components of lift - one due to the angle of attack and one due to the lift force generated by Bernoulli's principle. Ideally, this will improve the aerodynamic performance of the toy and Jian will make a fortune.
1 Comment
Keith
8/22/2021 05:22:04 pm
I used to buy these at the local 7-11 as a kid. They came in two parts.
Reply
Leave a Reply. |
Archives
September 2017
Categories
All
|