Sikorsky cut-backs
Helicopter international ; 17 , 5
1994
Article (Journal)
Unknown
In pursuit of speed, Piasecki backs compound helicopters and Sikorsky coaxial rotors
Online Contents | 2009
Sikorsky. The sikorsky "guardian."
Engineering Index Backfile | 1928
Online Contents | 2007
Engineering Index Backfile | 1963
Online Contents | 1995