The following link provides an interesting and full report with information and many photos about the use by the major military powers of helicopters during Second World War, undoubtedly, a rare theme and little explored in topics. The article can be viewed by visiting the link below: http://aviacaoemfloripa.blogspot.com.br/2011/02/asas-rotativas-na-segunda-guerra-mundial.html Greetings!
Fascinating pictures. Some I had seen, others not. Interesting sidebar, the first use of a rotary-wing craft was in Spain during the Asturian miners' strike of 1934. Which, obviously, predated "the Big One" by a few years.