No. 25 Ordinary Bomb Model 2No. 6 Mk. 1, Type 1 No. 6 Mk 1, and Type 4 No. 6 Mk 1 Bombs
Japanese Explosive Ordnance – Bombs, Bomb Fuzes, Land Mines, Grenades, Firing Devices
and Sabotage Devices
Chapter 1 – Section 2
Japanese Navy Bombs
No. 50 Ordinary Bomb Model 2

Fuzes: A-3 (d), B-3 (b).

Over-all length: 90 inches.

Length of body: 57 inches.

Diameter of body: 17 3/4 inches.

Thickness of wall: Nose, 4 inches; base, 1/2 inch.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: An eyebolt welded to a suspension band which fits around the bomb body. The band is positioned by two guide studs 180° apart on the bomb body.

Color and markings: Gray over all. Green band around the nose and a brown band aft of it.

Length of tail: 33 inches.

Width of tail: 17 3/4 inches.

Width of tail fins: 7 inches.

Dimensions of tail struts: Length, 12 1/4 inches; width, 2 3/4 inches; thickness, 1/8 inch.

Material of tail: Steel.

Type of filling: Type 98 explosive separately cast in the body and tail.

Weight of filling: 457.5 pounds.

Total weight of bomb: 1080 pounds.

Charge/weight ratio: 42 percent.

Construction of body: The body is of one piece machined steel construction. The after end of the body is threaded internally to receive the tail assembly.

The tail cone threads into the bomb body and is secured by two grub screws.

Construction of tail: Four 5/32-inch steel tail fins are spot welded to the tail cone. They are braced by a single set of box-type struts.

Figure 45 - No. 50 Ordinary Bomb Model 2.

No. 25 Ordinary Bomb Model 2No. 6 Mk. 1, Type 1 No. 6 Mk 1, and Type 4 No. 6 Mk 1 Bombs