Written in question and answer format, this book introduces readers to flight and gravity.... successful flying machine in 1903. One engine attached to the frame turned propellers and created enough power to keep the aircraft moving forward. This provided essential lift from air rushing under and over the wings to keep it airborne.
|Title||:||Why Do Airplanes Fly?|
|Publisher||:||The Rosen Publishing Group - 2010-01-01|