100-pound Incendiary AN-M47 Series

Over-all length, inches

Body length, inches

Body diameter, inches

Wall thickness, inch

Tail length, inches

Tail width, inches

Filling

Fuzing

M159, AN-M126A1, M126, M108, AN-M147

Construction: The bomb body is a sheet-steel tube with a longitudinal seam weld. The nose end is hemispherical. A base plate at the rear end is welded to the tube. Se-veral bursters may be interchangeably. The burster runs the length of the bomb. The Burster AN-M12 is a tube containing a 50-50 mixture of black powder and magnesium. The Burster AN-M13 is a tube containing TNT and tetryl pellets at each end, and is used in conjunction with the Igniter AN-M9 (WP or Na). The Na igniter will permit use over wa-ter. Four vanes are welded to a truncated cone with box-type interior struts to form the tail.

Suspension: Horizontal suspension is provided by two eyebolts formed by holes in each half of the two suspension bands, the halves then being crimped together to form a complete band. The bands are secured to the bomb body by tightening the bolts on the underside of the body. One of the band can be loosened and slipped to the center of gravity if single suspension is desired.

Two clusters are now standardized to provide single suspension for four to six bombs. The Cluster Adapter M24 holds six AN-47's; and the M22 has a capacity of four AN-M47's.

M47A2 - Gas: Loaded with 68.5 pounds of mustard gas. Complete round weighs 98 pounds. Inside of body is coated with oil. Equipped with Burster M4.

M47 - Chemical: Original design, has wall thickness of only 1/32 inch. Not used for H filling.

M47A2 - Smoke: Main filling is 100 pounds of white phosphorus, and total weight is 127 pounds. Burster M4 is authorized for high-altitude bombing; Burster M18 is authorized for low-altitude bombing. Burster M7 may be substituted for either.

M47A1 - Smoke: Like M47A2 - Smoke, with charge of 103 pound WP and total weight of 129.5 pounds, and interior coated with black acid-proof paint.

AN-M47A2 - Incendiary: Loaded with 40-pound charge of gelled gasoline, either IM or NP, with total weight of 68.6 pounds. Burster AN-M13 and Igniter AN-M9 (WP or Na) authoried for this bomb.

AN-M47A1 - Incendiary: Like AN-M47A2, with interior coating of acid-proof paint in-stead of oil.

AN-M47A3 - Incendiary: Incendiary to AN-M47A2, except that tail assembly is three inches longer.

AN-M47A4 - Incendiary: On this modification, the suspension lugs are strengthened.

The Navy is procuring, at the present time, Incendiary Bombs M47A2 loaded with PWP. PWP consists of 75% WP and 25% plasticizer; it is more effective than WP, since it gives longer burning, reduces pillaring effect, and increases the anti-personnel effect. The increased smoke efficiency is due to the larger particles of controlled size which re-sult from the use of PWP. The bomb contains 75 pounds of PWP and requires a Burster M20, which contains ¾-inch-diameter tetryl pellets.