"AUSA: As a rule of thumb, the aerodynamics of rotor blades limit helicopters to top cruising speeds well under 200 mph, but Sikorsky and Boeing are building an aircraft they promise will thumb its nose at that rule...." Full story on [ Ссылка ]
![](https://i.ytimg.com/vi/tcSbjL9iLCk/maxresdefault.jpg)
"AUSA: As a rule of thumb, the aerodynamics of rotor blades limit helicopters to top cruising speeds well under 200 mph, but Sikorsky and Boeing are building an aircraft they promise will thumb its nose at that rule...." Full story on [ Ссылка ]