21. They have the unique ability to change viscosity when confronted with aerodynamic forces acting on the fluid, 22. Aerodynamic forces promptly broke up the orbiter.23. Because aerodynamic forces involved with spacecraft flight are very small, this leaves gravity as the dominant force. 24. In order to measure the aerodynamic forces on the whole model, beam balances are connected to the model. 25. The general case of a launch from Earth must take engine thrust, aerodynamic forces and gravity into account. 26. Seventy-three seconds into flight, Challenger became so unstable that it was ripped apart by aerodynamic forces and explosions. 27. We watched as the shuttle was torn apart by aerodynamic forces that it was never designed to face. 28. The force vector is not straightforward, as stated earlier there are two types of aerodynamic forces , lift and drag. 29. Scientists use OVERFLOW to better understand the aerodynamic forces on a vehicle by evaluating the flowfield surrounding the vehicle. 30. The Parnall Parasol was an experimental parasol winged aircraft design to measure the aerodynamic forces on wings in flight.