Military History Books
by Harold A. Skaarup   www.SilverHawkAuthor.com   
 
Canadian Warplanes 7: Sikorsky R-4B Hoverfly

Sikorsky VS-316 (R-4B) Hoverfly Helicopter, RAF. 

Data current to 28 Dec 2020.

(RAF Photo courtesy of the Shearwater Aviation Museum)

Sikorsky VS-316 (R-4B) Hoverfly Helicopter, RAF.