USNBD, Bombs and Fuzes; Section I - High Explosvie Bombs; Part III - U.S. Army-Navy "AN" Series Bombs: 500 lb. AN-M58A2 & 1000 lb. AN-M59A1, AN-M59

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 - NAVY BOMB
	500 lb.	1000 lb.	500 & 1000 LB. S.A.P.
OVERALL LENGTH	57.8 in.	69.3 in.
BODY LENGTH	46.8 in.	57.3 in.
BODY DIAMETER	11.8 in.	15.1 in.
WALL THICKNESS	0.75 in.	1.0 in.	AN-M58	(500 lb.)
TAIL LENGTH	15.05 in.	16.8 in.	AN-M58A1	(500 lb.)
TAIL WIDTH	16.18 in.	20.7 in.	AN-M58A2	(500 lb.)
TAIL WEIGHT	11.4 lbs.	17.0 lbs.	AN-M59	(1000 lb.)
			AN-M59A1	(1000 lb.)
			AN-M58	(Obsolescent)
			AN-M59	(Service)

WEIGHTS:

	AN-M58	AN-M58A1	AN-M59
Type of Filling	T.N.T.	T.N.T.	T.N.T.
Weight of Filling	160 lbs.	162 lbs.	320 lbs.
Total Weight	472 lbs.	494 lbs.	995 lbs.
Chg/Wt. Ratio	33.9%	31.0%	32.0%

FUZING:

For ordinary use, only tail fuzes are employed in S.A.P. bomb, but AN-M103 fuzes and variations of this fuze can be employed fpr fragmentation effect, in which case a non-delay detonator is employed in the tail fuze. Othewise, in regular missions a short delay primer detonator is used in the tail fuze, with a shipping plug in the nose.

Regular Missions (Tail fuzed only)

500 lb.:	AN-M101A2, AN-M101A1, M161
1000 lb.:	AN-M102A2, AN-M102A1, M162

Special Missions (Fragmentation effect)

Nose:	AN-M103, AN-M103A1, M135, M135A1, M136, M136A1, M139, AN-M139A1, M140, AN-M140A1, M149, M163, M164, M165, Mk239
Tail:

500 lb.:	AN-M101A2, AN-M102A1, M161
1000 lb.:	AN-M102A2, AN-M102A1, M162

Other Missions (Tail fuzed only)

500 lb.:	M113A1, M113, M116 (minimum altitude) M124, M124A1, M133 (long delay)
1000 lb.:	M114, M114A1, M117 (minimum altitude) M125, M125A1, M134 (long delay)

VT Missions

Nose:	M166 (T51E1), T62
Tail:

500 lb.:	AN-M101A2 (to detonate bomb in event of VT fuze failure)
1000 lb.:	AN-M102A2 (to detonate bomb in event of VT fuze failure)

BODY CONSTRUCTION:

S.A.P. bombs are of single piece construction, either cast or spun, sligthly streamlined in shape with semi-pointed noses. The threaded nose opening receives a fuze seat liner and a steel nose plug, which can be removed allowing an instanta-neous nose fuze to be inserted when fragmentation effect is desired. Suspension lugs are welded to the case in a manner similar to G.P. boms (see Introduction, page 37); for dive bombing, trunnions on a band may be installed. The box type tail is characteristic of that used on G.P. bombs (see Introtuction, page 37).

FILLING:

Cast TNT is being used currently with a wax pad employed in the nose to cush-ion the explosive against premature detonation on impact with an armored target. One M104 auxiliary is used, positioned just forward of the M102 adapter booster. In the future, Army S.A.P. bombs will have Picratol as their main charge, the filling now standard for the M103 2000 lb. S.A.P.

COLOR AND MARKINGS:

Olive drab overall with one inch yellow band around the nose and base and 1/4 inch yellow band around center of gravity. Bombs having wax in the nose can be identified by the marking "with pad". Present production eliminates 1/4 inch. band.

REMARKS:

In the AN-M58A1, 9.5 lbs of Amatol are removed and replaced by 31.5 lbs. of steel to increase the penetration of the bomb. To enable these S.A.P. bombs to be used with anti-withdrawal fuzes, the AN-M58A2 and the AN-M59A1 incorporate base plate locking pins and the M102A1 adapter booster, time preventing removal of the base plate and adapter booster.