Chinese UAV & UCAV development


by78

Brigadier
A study on anti-stealth radar drones.

- The drones operate cooperatively as a formation, each carrying necessary sensors.
- They are solar-powered, both for the flight systems and the sensor suites. Interestingly, they can also be recharged in-flight using ground based lasers under emergency situations, but this may require that they lower their altitude.
- High endurance.
- The formation is composed of "lead UAVs" and "follower UAVs". The lead UAVs carry
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, and they take care of coordination as well as signal processing.



 

by78

Brigadier
A transformer plane or drone, sort of. The link below contains a full English translation.

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Abstract: The utility model provides a kind of change sweepforward twin-fuselage configuration aircraft, is related to a kind of multipurpose air fighting platform layout scheme.The utility model becomes sweepforward twin-fuselage configuration aircraft, it can be achieved that subsonic flight state is to the conversion of supersonic flight state, and becoming sweepforward twin-fuselage configuration aircraft includes:Anterior centrosome (1), two variable sweepback front wings (2), two fuselages (4), variable buzzard-type wing (6) and undercarriage.Becoming sweepforward twin-fuselage configuration aircraft can realize subsonic speed state to the mode conversion of supersonic speed state by becoming body mechanism, become sweepforward, the design of boxlike wing layout takes into account Asia/supersonic speed lift resistance ratio, and it can realize retrofocus amount more smaller than conventional airplane, supersonic speed state both sides fuselage is combined into one, increase slenderness ratio, longitudinal cross-section area distribution is gentle, twin fuselage and anterior centrosome fuselage arrangement, add the delivered payload capability of body, compatible kinetic energy and directional energy antipersonnel weapon.




 

by78

Brigadier
A transformer plane or drone, sort of. The link below contains a full English translation.

Please, Log in or Register to view URLs content!


Abstract: The utility model provides a kind of change sweepforward twin-fuselage configuration aircraft, is related to a kind of multipurpose air fighting platform layout scheme.The utility model becomes sweepforward twin-fuselage configuration aircraft, it can be achieved that subsonic flight state is to the conversion of supersonic flight state, and becoming sweepforward twin-fuselage configuration aircraft includes:Anterior centrosome (1), two variable sweepback front wings (2), two fuselages (4), variable buzzard-type wing (6) and undercarriage.Becoming sweepforward twin-fuselage configuration aircraft can realize subsonic speed state to the mode conversion of supersonic speed state by becoming body mechanism, become sweepforward, the design of boxlike wing layout takes into account Asia/supersonic speed lift resistance ratio, and it can realize retrofocus amount more smaller than conventional airplane, supersonic speed state both sides fuselage is combined into one, increase slenderness ratio, longitudinal cross-section area distribution is gentle, twin fuselage and anterior centrosome fuselage arrangement, add the delivered payload capability of body, compatible kinetic energy and directional energy antipersonnel weapon.





I wonder the flexible aerodynamic configurations of the airframe might make also it suitable for deployment on aircraft carriers. The patent doesn't specify the dimensions in its most compact form, but I'd imagine it may well fit in a carrier hangar.
 

Temstar

Junior Member
Registered Member
So the patient list the following rationale for the design:

1. To satisfy long cruise range and/or long loitering time requirement of a UCAV, it needs to have high lift-to-drag ratio when subsonic
2. To satisfy interception requirements it must be able to achieve high speed high altitude flight, this requires low supersonic drag
3. Stealth alone can no longer guarantee survival, UCAV must have good payload carrying capacity to carry self-defence weapons

Previously the following attempts have been made to achieve multiple of the above goals:

1. B-1B variable geometry swept wings. This achieves goal 1 and 2, but comes with the downside of large shifts in centre of mass which causes problems with aircraft control
2. Subsonic flying wings like B-2 or X-47B, excellent subsonic performance and good payload fraction, but cannot be supersonic
3. High supersonic aircraft like SR-71, very high speed and high survivability, but lacks subsonic endurance

This variable geometry forward swept wing design is aimed at achieving all three goals at once.
 

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