USNBD, Bombs and Fuzes; Section I - High Explosvie Bombs; Part III - U.S. Army-Navy "AN" Series Bombs: 90 lb. M82

U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS

SECTION I - HIGH EXPLOSIVE BOMBS

PART IV - U.S. ARMY-NAVY "AN" SERIES BOMBS

DATA:		U.S. - ARMY BOMB
		90 LB. FRAG
OVERALL LENGTH	28 in.
BODY LENGTH	19.8 in.
BODY DIAMETER	6 in.
WALL THICKNESS	0.94 in.	M 82
TAIL LENGHT	9.3 in.	M 27 Cluster
TAIL WIDTH	8.1 in.	(Service)
TAIL WEIGHT	2.8 lbs.

WEIGHTS:


Type of Filling	Comp. B
Weight of Filling	12.0 lbs.
Total Weight	91.6 lbs.
Chg/Wt. Ratio	13.1%

FUZING:

M103, AN-M103, AN-M103A1, M135, M136, M136A1, M139, AN-M139A1, M140, AN-M140A1, M149, M163, M164, M165, M166, T82

BOMB CONSTRUCTION:

Nose and tail piece of cast steel screw on to a central section of seamless steel tubing. A square helical steel spring is wound around the steel tubing. The nose and tail pieces are partically cut through to afford greater fragmentation. The bomb is suspended by single lug or in a cluster (M27) of six bombs. The tail is of normal U.S. box construction and is secured to the bomb by a locking ring.

COLOR & MARKINGS:

Olive drab overall. One inch yellow band around the nose and extreme rear of the bomb, and a 1/4 inch band around the center of gravity. Present production elimina-tes the 1/4 inch band.

M27 CLUSTER, M14 CLUSTER ADAPTER:

GENERAL:

The M27 cluster consists of a 500 lb. cluster of six 90 lb. fragmentation bombs (M82) and the cluster adapter M14 (US), fuzed with the M155 nose fuze.

CONSTRUCTION AND OPERATION:

The M14 cluster adapter consists of two longitudinal steel tubes, 56 inches long, to which are welded four steel plates forming the support for the six bombs. The lower tube serves as the backbone of the cluster and the upper tube carries the suspension lugs, buckles for the releasing straps and the adapters for the nose and tail fuzes. The nose fuze M112A2 or M155 is used; however, a mechanical time fuze for the tail is not available to the fitted.

The cluster may be adjusted to release the bombs immediately or, through the use of mechanical time fuzes, to discharge the bombs 5 to 92 seconds after the re-lease of the cluster from the plane. If it is intended that the cluster is to open im-mediately, the shear wire is cut after the arming wire is installed and no fuze is used.

Remarks:

The immediate opening of the cluster produce the most favorable impact pat-tern. The cluster must open at a minimum of 1000 feet in order that the bomb fuze can arm.