I designed this so that the kids (and I) could expand that age-old game of putting your hand out the car window and "flying". Now, with an actual air-foil you can play more scientifically.
Go Science! Go Experimentation!
Edit 2018-07-01: Added additional STLs for wider airfoil widths to mimic the dimensions of a symmetrical helicopter main rotor blade. 15mm x 100mm
Original airfoil dimensions 15mm x 75mm
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/eNgIWtRGnhU
Infill and Shells:
- Airfoil: should be printed with at least 20% infill, and 4 Shells. This part needs to be light and strong.
- Handle: There will be a lot of lateral stress on this while "flying". Print with 50% infill, and 4 Shells.
- Thumb Screws: 50% Infill, 4 Shells.
- Parts were cleaned up prior to build with successive sanding with 120, 200, 400 Grit sandpapers.
Overview and Background
This multi-part model is designed to provide a tool to allow the user to experience aerodynamics of a symmetrical airfoil. In particular, actively experimenting with the forces of lift, drag, gravity given the trust of a moving vehicle. The user builds the model, connects the pieces and while holding firmly to the handle, places the airfoil out of the back seat window, and given slight variations of angle of attack (AoA, the angle at which the relative wind hits the airfoil) can impact the lift and drag on the airfoil.
Lesson Plan and Activity
- Understand the 4 fundamental forces of Aerodynamics.
- General understanding of Bernoulli's Principle
- Understand the concept of Relative Wind, and Angle of Attack (AoA)
- Understand the concept of symmetrical airfoils
- 3D Print, and assemble the experimental hand airfoil.
- General understanding of Bernoulli's Principle (Increasing fluid velocity results in a drop of pressure in that fluid)
- Eexplain effect of changing the angle of attack (AoA) of the airfoil on Lift and Drag.
- Explain the 4 fundamental aerodynamic forces, Lift, Gravity, Thrust, Drag
- Vehicle (Passenger Car, School Bus) to act as the thrust for the airfoil.
- 3D Printed Hand Airfoil
Object must be pre-printed prior to lesson.
Aerodynamics & Flight
Fundamental Forces of Flight