Enlarged ed. of Practical helicopter aerodynamics, with additional material previously published in Rotor & wing international from 1982-1984. https://siris-libraries ...

For about 76 years, helicopters have served the world as an important alternative to fixed-wing aircraft. Helicopters can go places and do things that airplanes cannot, like save mariners stuck at sea ...

Helicopters have one of the most recognizable sounds in aviation. The signature "whop whop" or deep thumping sound announces its arrival long before it appears in the sky. It's a sound so iconic, it's ...