
A steel nose piece is held by three grub screws to a steel sealing plate. The plate is welded to a tubular steel body by a continuous circumferential weld. A burster tube threads into the sealing plate and the joint is made airtight by a lead washer. A tail cone is welded to the after end of the body.
Four steel fins are welded to the tail cone and are braced by a single set of box-type struts.
400-450 rubber bungs (1 inch long by 1 inch diameter) impregnated with phosphorus dissolved in carbon disulphide. The high explosive charge in the nose and central burster tube is picric acid.
Incendiary filling (35 lbs, 15.9 kg). Picric acid (5 lbs, 2.3 kg).
General Information, Japanese Navy Bombs
Nose, A-2(a), Type 93 Instantaneous
Nose, A-2(b), Type 12 Year Instantaneous
Nose, A-2(c), Type 99 Instantaneous - Short Delay