Do helicopters need more or less energy to stay in the sky than an airplane? What pushes a rocket to leave the atmosphere? Why can airplanes have smaller motors

Featuring thirty-two designs, Amazing Paper Airplanes showcases models resembling real-world aircraft, including the F-22 fighter jet, a P-51 World War II plane

This book teaches the reader to build rockets--powered by compressed air, water, and solid propellant--with the maximum possible fun, safety, and educational ex

Following on the success of 100 paper planes, this title features new planes based on four different layouts, each decorated with its own unique colours, motifs