Vintage Aviation News on MSN

Pioneers of aeronautical engineering: Igor Sikorsky – the man behind the first practical helicopter

Igor Sikorsky built the world's first practical helicopter, pioneered four-engine aircraft, and created Pan Am's Flying ...
insider.si.edu

"Helicopter Problems," "Early Helicopters," "Successful Helicopters," and "Sikorsky's Helicopters" [Lenkowsky?, unfinished chapters]

Mandel Lenkowsky Early Vertical Flight Development Collection / Series 1: Correspondence and Manuscript Notes Material is subject to Smithsonian Terms of Use. Should ...