Letters From Our Readers, August 30, 2021

Maurice Leger’s Grand Appareil
Credit: Smithsonian National Air and Space Museum
COAXIAL COUSINS It is fitting that Ingenuity, the first interplanetary helicopter (April 19-May 2, p. 20), is of the same architecture as the first helicopter to fly on Earth 114 years ago, i.e. coaxial. Maurice Leger’s Grand Appareil climbed to 80 cm (2.6 ft.) on June 13, 1907, at the Castle of...

Letters From Our Readers, August 30, 2021 is available to both Aviation Week & Space Technology and AWIN subscribers.

Subscribe now to read this content, plus receive critical analysis into emerging trends, technological advancements, operational best practices and continuous updates to policy, requirements and budgets.

Already a subscriber to AW&ST or AWIN? Log in with your existing email and password.