Description
Black overall with a red tipped nose and a yellow band forward lug.
The nose and barrel of the 100-kg. and 250-kg. are constructed of 1 piece machined tubular steel. On the 500-kg. a steel nose piece is welded to a tubular-steel barrel. The after end of the barrel is threaded internally to receive the tail assembly. A row of 12 hexagonal bolts around the circumference of the bomb just forward of the after end of the barrel hold a steel reinforcing plate in place. This cylindrical section closed at one end by a perforated plate is strengthened by 3 strips of metal bent at a 60° angle, which divide it into 6 equal compartments. Twelve holes are drilled in the outer circumference of the section to accommodate the bolts. TNT is cast in the section to a point flush with its after edges. The tail cone is welded to a collar which screws into the after end of the barrel. Welded to the apex of the tail cone is a burster tube. This tube contains picric acid and is fitted with a fuze adapter at its after end.
The tail fins are made from sheet steel. There are two layers of steel in each fin, a single piece having been bent double and the two inner edges welded to the tail cone and burster tube by a continuous weld. The forward and after ends of the fins are closed by welding. The tail fins are not supported by tail struts.
Hazardous Components
Paper wrapped, cast picric blocks sealed with TNT (535.5 lbs, 243.4 kg)
See Also
General Information, Japanese Navy Bombs
Bomb, 100 kg HE, Type 4 Anti Shipping
Bomb, 250 kg HE, Type 4 Anti Shipping
Nose, A-8(a), Type 4 Two Second Delay
Tail, B-8(a), Type 4 Five Second Delay
Source(s)
