USNBD, Bombs and Fuzes; Section I - High Explosvie Bombs; Part III - U.S. Army-Navy "AN" Series Bombs: 1000 lb. AN-M44, AN-M65

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:		ARMY - NAVY BOMBS
		1000 LB. G.P.
OVERALL LENGTH	67.1 in.
BODY LENGTH	53.1 in.
BODY DIAMETER	18.8 in.
WALL THICKNESS	0.5 in.	AN-M44 (Obsolesecent)
TAIL LENGTH	18.5 in.	AN-M65 (Service)
TAIL WIDTH	25.4 in.	AN-M65A1 (Service)
TAIL WEIGHT	21.5 in.

WEIGHTS:

	AN-M44		AN-M65		AN-M65A1
Type of Filling	Amatol	T.N.T.	Amatol	T.N.T	T.N.T	Comp B
Weight of Filling	530#	558#	530#	558#	558#	595#
Total Weight	964#	990#	965#	990#	990#	1040#
Chg/Wt. Ratio	54.9%	56.0%	55.8%	56.0%	56.0%	57.0%

FUZING:

The fuzing of these three bombs is the same with these exceptions: The AN-Mk 230 (and Mods) and Mk 231-0 fuzes can be used in the AN-M65 since this bomb has the M115 (or M115A1) adapter booster. The M115 adapter booster has a slee-ve that can be easily removed making it possible to use a fuze with a larger diame-ter. With the removable sleeve screwed in the adapter booster any Army tail fuze may be used. The AN-M44 uses the M102 adapter booster which has no removable sleeve and therefore cannot take the AN-Mk 230 (with Mods) and Mk 240 hydros-tatic fuzes.

Regular Missions

Nose:	AN-M103, M103, AN-M103A1, M135, M135A1, M136, M136A1, M139, AN-M139A1, M140, AN-M140A1, M149, M163, M164, M165, Mk 239, Mk 243, Mk 244
Tail:	AN-M102A2, AN-M102A1, M102, M162

Special Missions

Tail:	M114, M114A1, (Masthead bombing from land base only) M117 (Masthead from carrier or land base) M125, M125A1, Mk 238-0 (Long Delay Time Fuze against land targets)
Nose:	Shipping plug, when above tail fuzes used.

Anti-Submarine Mission (AN-M65, AN-M65A1)

Nose:	AN-M103A1, AN-M103, M103, M139, AN-M139A1, M140, AN-M140A1, M163, M164, M165, Mk 239, Mk 243, Mk 244-0-1
Tail:	AN-Mk 230-4-5-6, Mk 230-0 (sleeve in M115 adapter booster must be removed before this fuze can be used)

VT Missions

Nose:	T50E4, T90, T92, M166 (T51E1), T82
Tail:	AN-M102A2 (To detonate bomb in event of VT fuze failure).

REMARKS:

The AN-M44, AN-M65, and AN-M65A1 differs in the adapter booster which is em-ployed in the base plate to receive the tail fuze. The AN-M44 uses the M102 adap-ter booster, the AN-M65 uses the M115 adapter booster, and the AN-M65A1 uses the M115A1 adapter booster. The A1 modification also includes tow base plate locking pins fitting into the main filling, preventing removal of the base plate, and a groove in the internal threads of the base plate which mates with the hole of the M115A1 adapter booster to receive a locking pin, supplied only which anti-withdra-wal fuzes. With this pin held in place by the fuze body, the adapter booster cannot be extracted.

B-29 attacks on Japan have shown that aerodynamic forces at high altitudes of bombing (over 25,000 ft.) are causing the tail assemblies of G.P. bombs to deform, thus inducing erratic bomb flight and side impact. Until standard heavier gauge fins are available, rein-forcing fin kits consisting of angles, brackets, and plates are be-ing issued to strengthen tail assemblies.

For Construction of Body, Suspension, Color & Markings, Type of Filling, and Tail Construction, see Introduction, page 37.