'An aeroplane runs at 600 km / h. The rotor of the engine weighs 4000 N with radius of gyration of 1 metre. The speed of rotor is 3000 rpm in anticlockwise direction when seen from rear side of the aeroplane: If the plane takes left turn in a curve of 100 metres radius; find 1. gyroscopic couple developed; and 2. effect of reaction gyroscopic couple developed on the body of aeroplane by using vector diagram:'