15 - 19 15-12. CARGO HELICOPTERS This category of helicopters includes the CH 47B/C and the CH 47 B/D Chinooks. With slingload, cargo helicopter TDP is #5 (100 meter diameter); without slingload, it is #4 (80 meter diameter). a. CH 47B/ C Chinook. Table 15-9 shows specifications for the CH 47B/C Chinook; Figure 15-20 shows the aircraft from three angles. Table 15-9. SPECIFICATIONS FOR THE CH 47 B/ C (CHINOOK) Rotor Diameter 60 feet Length: Rotors Operating Rotors Folded 98 feet 10 3/4 inches 50 feet 9 inches Height (Overall) 18 feet 11 1/2 inches Tread 11 feet 11 inches Rotor Ground Clearance Static Forward Idling Forward 7 feet 4 3/4 inches 10 feet 11 inches Clear Area Needed for Rotors 30.4 meters TDP # 4 80 meters diameter Allowable Cargo Load 21,000 pounds Figure 15-20. CH-47B (CHINOOK)