Amazon.com: GoolRC RC Helicopter RC Drone Single Propeller Without Ailerons 6-axis Gyro Stabilization RC Airplane Altitude Hold Girls Adults Remote Control Helicopter Toys for Boys RC Plane : Toys & Games
Boeing CH-47 Chinook Twin Engine Tandem Heavy-Lift Helicopter : CH-47, Chinook: Movies & TV - Amazon.com
View topic - Sikorsky's Super Helicopter. The fastest Heli ever built! - Rotary Wing Aircraft
Amazon.com: chinook helicopter
Have any other countries built a twin rotor helicopter like the Chinook? If so, was it successful? - Quora
GREAT RC MODEL HELICOPTER DOUBLE ROTOR BOEING-VERTOL CH-47 CHINOOK INDOOR FLIGHT!! - YouTube