
Gray overall. Silver nose tipped with green. Red tail struts.
A cast steel nose is welded to a tubular-steel body by a continuous weld and a row of 12 plug welds. The tail cone is held by 1 row of 18 plug welds and a continuous weld to a collar which is held in the base of the bomb by 2 rows of round-headed screws, 20 in each row.
Four steel fins are welded at an angle to the tail cone. The fins arc braced at the juncture with the tail cone by a steel strip welded to the underside of the bent fin and the cone. At the after end the fins are braced by two sets of box- ype struts. The angle of the fins imparts a counter clockwise rotation in flight to the bomb.
Incendiary filling: 750 (approximate) steel cylinders containing an incendiary mixture (barium nitrate: 35.8%, iron oxide: 27.2%, aluminum powder: 13.6%, magnesium shavings: 10.3%, synthetic shavings: 13.1%. Filler weight is 300 lbs, 136.4 kg.
The cylinders are packed in circular rows in nine perforated nitrocellulose containers.
Two burster charges are contained in the nose piece and in the tail cone. The explosive is also scattered throughout the interstices of each incendiary section. The composition of the charge is barium nitrate: 75.2%, aluminum powder: 24.2%, oil: 2%. Filler weight is 73 lbs, 33.2 kg.
Perforated steel plates in the nose and tail separate the burster charges and the incendiary filling.
General Information, Japanese Navy Bombs
Nose, A-3(a), Type 97 Mk 2 Model 2