I.B. 400-lb. Mk I (Service)

Fuzing

Color markings

Tail No.

Over-all length

Body length

Body diameter

Tail length

Tail width

Body Construction: The bomb body consists of a thin-steel cylinder with a tail plate welded at one end and a nose at the other. The nose is recessed to acommodate a cast-iron weight, which is secured in position with bolts. Three perforated baffles are welded internally to the bomb case to reduce surging of the filling while the bomb is sus-pended aboard the aircraft. An internally threaded adapter in the center of the tail plate serves as a charging hole and also for the fitting of the exploder container. A cowl wel-ded to the tail plate has six equi-spaced springs riveted inside it. These springs form an attachment for the six fasteners which secure the tail unit to the bomb. These fasteners consist of a stud and a leaf spring. The studs have an external screw-driver slot and an internal cam slot. The cam slot engages the spring attached to the cowl.

Tail Construction: The Tail No. 79 Mk I consists of a cylindrical strut attached to the tail cone by means of three tail fins. The arming fork has only one prong, which engages the T-bar of the Pistol No. 60.

Suspension: This bomb is equipped for suspension in either British or American air-craft, having on one side a single suspension lug, and dual lugs 180° removed.

Filling:

Detonators – Sensitive type

Exploders – C.E., 3-ring, and 2 solid pellets

Filling – 6% aluminum laurate, 2% creosole, and 5% Napalm

Remarks: This bomb is filled with a highly volatile, inflammable gel which is readily ig-nited by naked flame, or by contact with water. The filling may smell of gasoline, or car-bolic acid. Rubber boots, gloves, and eye-shields are recommended for all personnel en-gaged in disposal operation on this bomb. If the filling comes into contact with the skin, all traces should be swabbed off with a rag soaked in gasoline or paraffin, and the effec-ted area should then be washed with water and the patient treated for alkali burns. Con-taminated equipment should be cleaned with gasoline or paraffin, and then washed with water.

Figure 44 –I.B. 400-lb. Mk I