Bogie Covered Hopper Wagon for Fly Ash --- Air assisted gravity discharge covered hopper wagon with 4-axle suitable for carrying Fly Ash. Fitted with modified CASNUB 22 HS bogie with non-transitional CBC & O-14 I-14 S-4 spring. Axle load 21.2 T. Capacity - 67.1 Tonnes. Type - BCFC.