“It would be right to state that, with the successful flight of the XR-4 in the summer of 1942, the helicopter became a reality in the United States.” StatesRealityWould BeUnitedUnited StatesSuccessfulSummerFlightHelicopters Author:Igor Sikorsky
“It would be right to say that the helicopter's role in saving lives represents one of the most glorious pages in the history of human flight.” HumansWould BeRolesPagesFlightSavingGloriousHelicoptersSave A Life Author:Igor Sikorsky
