https://newatlas.com/sikorsky-s-97-raider-maiden-flight/37716/
Sikorsky S-97 Raider spins up coaxial rotors on maiden flight
May 27, 2015 - Sikorsky's S-97 Raider prototype helicopter has taken to the air for the first time. Based on the design of the X2 Technology Demonstrator, the S-97 Raider...
sikorsky s 97 raidercoaxial rotorsspins
https://newatlas.com/military/sikorskys-s-97-raider-helicopter-agility-us-army/
Sikorsky's S-97 Raider helicopter puts on a show for the US Army
Apr 19, 2021 - Lockheed Martin subsidiary Sikorsky Aircraft's S-97 Raider advanced prototype helicopter showed off its agility by completing two demonstration flights for the...
sikorsky s 97 raider