US Bomb, 100 lb Incendiary, AN-M47 Series
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. Several bursters may be used 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 water. Four vanes are welded to a truncated cone with box-type interior struts to form the tail.
AN-M47A2 — Incendiary: Ix>aded 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) authorized for this bomb.
MI7A1—Incendiary: Like AN-M 17A2, with interior coating of acid-proof paint instead of oil.
AN-M47A3 — Incendiary: Identical to AN-M47A2, except that tail assembly is three inches longer.
AN-M47A4—Incendiary: On this modification, the suspension lugs are strengthened.
The Navy procured Incendiary Bombs M47A2 loaded with PWP. PWP consists of 75% WP and 25% plasticiser; 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 result from the use of PWP. The bomb contains 75 pounds of PWP and requires a Burster M20, which contains 3/4 inch diameter tetryl pellets.
Collaborative Ordnance Data Repository