The maximum takeoff weight of Rainbow-7 stealth drone is 13 tons and has a wingspan of 22 meters. It is also designated the Caihong-7 (CH-7) stealth UAV.
The claim is that the CH-7 is superior to the Lockheed Martin RQ-170 drone. The RQ-170 Sentinel was developed by Lockheed Martin’s Skunk Works as a stealth Unmanned Aerial Vehicle (UAV). The RQ-170 is a flying wing design containing a single (as yet classified) engine and is estimated by Aviation Week as having a wingspan of approximately 66 feet (20 meters). The RQ-170 was introduced in 2007.
The US RQ-180 stealth drones has a 40 meter or larger wingspan. The RQ-180 is built by Northrop Grumman.
The RQ-180 is believed to be about the size of the Global Hawk. The Global Hawk weighs 32,250 lb (14,630 kg). They have similar 24-hour flight endurance and range 1,400 miles. ( 2,200 km)