co-axial helicopter
1Axial compressor — Axial compressors are rotating, aerofoil based compressors in which the working fluid principally flows parallel to the axis of rotation. This is in contrast with centrifugal, axi centrifugal and mixed flow compressors where the air may enter… …
2Heavy Transport Helicopter — infobox Aircraft name = Heavy Transport Helicopter type = Heavy lift cargo helicopter logo = manufacturer = Eurocopter GmbH, Muenich caption = designer = first flight = introduction = retired = status = Program study primary user = more users =… …
3Gyrodyne QH-50 DASH — QH 50 DASH A QH 50 on board the destroyer USS Allen M. Sumner (DD 692) during a deployment to Vietnam between April and June 1967. Role …
4QH-50 DASH — infobox Aircraft name = QH 50 DASH caption = A QH 50 on board the destroyer USS Allen M. Sumner (DD 692) during a deployment to Vietnam between April and June 1967. type = ASW drone national origin = United States manufacturer = Gyrodyne Company… …
5Manzolini Libellula — Libellula Role Light experimental helicopter Manufacturer Manzolini Designer Ettore Manzolini First flight 1952 Number built 3 The Manzolini Libellula was a 1950s Italian co axial twin rotor helicopter designed by Ettore Manzolini. Libellula is …
6Sikorsky X2 — Infobox Aircraft name= X2 Demonstrator caption= Concept of the Sikorsky X2 Demonstrator type= Experimental helicopter manufacturer=Sikorsky Aircraft/Schweizer Aircraft designer= first flight= 27 August 2008Trimble, Stephen.… …
7NOTAR — MD Explorer (German police) NOTAR is the name of a helicopter anti torque system which replaces the use of a tail rotor. Developed by McDonnell Douglas Helicopter Systems (through their acquisition of Hughes Helicopters), the name is an acronym… …
8United Helicopters — was formed in 1944 as a joint venture between Stanley Hiller and Henry Kaisercite web|url=http://www.helis.com/timeline/hiller.php |title=Helis.com Hiller Background] . The company made a very wide range of helicopters, including the world s… …
9Sikorsky S-69 — Infobox Aircraft name= S 69/XH 59 caption= Sikorsky S 69/XH 59 with auxiliary turbojets type= Experimental helicopter manufacturer=Sikorsky Aircraft designer= first flight= July 26 1973 introduced= retired= status= primary user= NASA more users=… …
10Chu Hummingbird — Hummingbird Role Experimental helicopter Designer C.J. Chu First flight 1945 47? Status unknown Produced 2 Number built 2 The Chu Hummingbird was an experimental co axial helicopter developed by Chinese aviati …
