Specifications:  
Boeing B-29A Superfortress  
Dimensions:  
Wing span:  141 ft. 3 in (43.05 m)  
Length:  99 ft. 0 in (30.17 m)  
Height:  29 ft. 7 in (9.02 m)  
Wing Area:  1,736 sq ft (529.13 sq m)  
Weights:  
Empty:  72,208 lb (32,752 kg)  
Maximum Take-Off:  140,000 lb (63,502 kg)  
Performance:  
Maximum Speed:  399 m.p.h. (642 km/h) at 30,000 ft (9,144 m)  
Service Ceiling:  23,950 ft (7,299 m)  
Combat Ceiling:  36,150 ft (11,018 m)  
Normal Range:  4,200 miles (6,759 km) 
(with 18,000 lbs. (8,164 kg) bombs)  
Powerplant:  
Four Wright Aeronautical R-3350-57 Twin Row Radial 
2,200 hp (1,640 kw) take-off, 2,500 hp (1,864) WE, Air Cooled 
Armament:  
Eight or twelve 50-cal. machine-guns. One 20mm cannon. 
Maximum bomb Load: 20,000 lbs. (9,0710 kg) 
Imagine what a formation could do with a 20000 pound payload(40 5oo pounders/20 1ooo pounders)
 
 This would make the ammo bunkers a primary target:aok