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US Free-Fall Bombs and Nuclear Warhead Designation
1943 - 1989
--------------------------------------------------
Designation Yield Description
Mk 1 15 Kilotons "Little-Boy" (U235 Gun-Assembly) Bomb
For B-29 , withdrawn Jan 1951.
Mk 2 U235/Pu239 implosion bomb , no production
models developed.
Mk 3 21 Kilotons "Fat-Man" Pu239 bomb for B-29, B-50,
withdrawn Dec 1950.
Mk 4 20-40 Kilotons First Production Model Bomb for B-29
withdrawn May 1953.
Mk 5 81 Kilotons Bomb ,withdrawn in Jan 1963.
Mk 6 30-60 Kilotons Improved "Fat-Man" design, withdrawn 1962
Mk 7 60-70 Kilotons U235 implosion device, withdrawn June 1967
Mk 8 15-20 Kilotons Improved "Little-Boy" design, withdrawn
August 1957.
Mk 10 Gun-type airburst device, no production
units, program cancelled in May 1952
Mk 11 Gun-type device, withdrawn in 1960
Mk 12 10-20 Kilotons Withdrawn in July 1962
Mk 13 High Yield Fission device, no production
units. Project cancelled August 1954
Tx 14 Early Thermonuclear design, cancelled
in October 1954
Mk 15 1.8 Megatons Thermonuclear Device tested at "Bikini"
in 1954, withdrawn in April 1965
Mk 16 Thermonuclear device, no production
units. Program cancelled in April 1954
Mk 17 15-25 Megatons First Production Thermonuclear Weapon
,withdrawn in August 1957
Mk 18 500 Kilotons U235 fission Bomb for B-36 and B-47
Withdrawn march 1956
Mk 20 No production units, program cancelled
August 1954
Mk 21 2-5 Megatons Thermonuclear device converted to Mk 36,
withdrawn in November 1957.
Mk 22 No Production units, Program cancelled
in April 1954
Mk 24 15-20 Megatons Bomb for B-36, similiar to Mk 17,
withdrawn in October 1956
Mk 26 No production units, device similiar
Mk 21, program cancelled in 1956
Mk 27 1-2 Megatons Thermonuclear free-fall naval bomb
withdrawn July 1964
Mk 28 70 Kilotons to Tactical and strategic free-fall bomb ,
1.4 Megatons deployed on B-52 (4-8), F-4 (1),
A-4 (1), A-6 (3), B-1B (up to 20).
Mk 36 9-10 Megatons Air or Surface Burst Strategic Bomb ,
withdrawn January 1962.
Mk 39 1.8 Megatons (+) Improved Mk 15 with drogue parachute
for surface bursts against hardened
targets, withdrawn November 1966
B41 8.9 Megatons Strategic Bomb , withdrawn July 1976
B43 1 Megaton (B43/Y1) Tactical and strategic free-fall
configured in several yields. Deployed
on A-6 (3), A-4 (1), A-7 (4), F-16 (2),
F-4 (3), F-111 (6), B-52 (4).
Parachute-retarded for air burst or
free-fall (B43/Y1). Also delayed surface
burst from release at low altitude.
In active service.
B46 Similiary to Mk 21, no production units,
program cancelled October 1958.
B53 9 Megatons (B53-Y1) Strategic Bomb , - Being Withdrawn
B57 10-20 Kilotons Tactical weapon, deployed on A-4 (1),
(Mods 0,1,2) A-6 (3), A-7 (4), P-3 (3), S-3 (3),
SH-3 (1), F-16 (2), F-4 (3), FB-111 (6).
In active service.
B61 Mods 0,2,3,4,5 Tactical and strategic bomb, Mods 1,3,4
100-500 Kilotons clasified as strategic, Mod 1 yield in
megaton range. In active service.
B77 Development program for new bomb with
full fusing option. Free-fall, retarded,
air or ground burst with aerofoil
parachute, no production units, program
cancelled December 1977.
B83 1-2 Megatons New strategic free-fall bomb, In
active service.
BDU Mods 8,11,12,38 Training versions of nuclear weapons
Missile-delivered warheads
--------------------------
W5 81 Kilotons (est) Warhead for Regulus, Matador, Rascal,
and Rigel SSMs, withdrawn in 1963.
W7 2-40 Kilotons Warhead for Corporal, Honest John,
Boar, Betty plus others. Retired in
May 1967.
W8 No production units, program cancelled
in 1958
W9 15 Kilotons First Atomic Artillery Shell, withdrawn
May 1957
W12 Alternate warhead to W7, for Boar
and Talos SAMs, no production units.
Program cancelled Novemver 1955.
W19 Improved W-9 nuclear artillery shell
for 280mm Gun. Withdrawn in 1963
W23 15-20 Kilotons Nuclear Artillery shell for 16-inch
gun, withdrawn in October 1962
W25 1.25 Kilotons Warhead for Genie AAM, withdrawn in
December 1984
W27 Warhead for Regulus and Rascal SLCM,
ASM's, similiar to Mk 27.
W28 1 Megatons Warhead for Mace and Hound-Dog, GLCM and
ASM, withdrawn in 1970 (Mace), 1976
(Hound-Dog)
W29 Warhead for Redstone and Navaho SSMs,
No productions units, program cancelled
in august 1955.
W30 5 Kilotons Warhead for TALOS shipborne SAM , and
XM-113 Tactical Atomic Demolition
Munition (TADM). Withdrawn 1979 (Talos),
1966 (TADM).
W31 2-40 Kilotons Nuclear warhead for Nike-Hercules SAM
, Honest John SSM, Crossbow ASM, and
ADM (Atomic Demoliton Munition).
Withdrawn 1965 (ADM), 1987 (Honest-John),
Crossbow program cancelled, Nike-Hercules
still active.
W32 Artillery Fired Nuclear Projectile for
240mm Gun, No production units, program
cancelled May 1955.
W33 5-10 Kilotons Artillery Fired Nuclear Projectile for
8 in Gun, In active service.
W34 10-15 Kilotons Warhead for Lulu (depth bomb) ,
Astor Mk 48 Torpedo ,and Mk 104 Hotpoint
Bomb. Withdrawn September 1977.
W35 Warhead for Thor, Atlas, Jupiter and
Titan ICBMs/IRBMs. No productions units,
program cancelled August 1958.
W37 Warhead for Nike-Hercules SAM, No
production units, program cancelled in
September 1956.
W38 3-4 Megatons Warhead for Atlas and Titan I, ICBMs
withdrawn May 1965.
W39 1-2 Megatons Warhead for Snark and Redstone GLCM/SSM
withdrawn September 1965.
W40 Warhead for Bomarc (SAM) and Lacrosse
(SSM), withdrawn 1972 (Bomarc) , 1964
(Lacrosse).
W42 Warhead for Hawk, Eagle, Sparrow and
Falcon SAMs/AAMs , no production units,
program cancelled June 1961.
W44 1 kiloton Nuclear Depth Charge warhead for ASROC
, in active service.
W45 Mod-1 1 kiloton Nuclear warhead for Terrier naval
shipborne SAM, Little-John, Bullpup,
and Medium Atomic Demolition Munition
(MADM). Withdrawn 1970 (Little-John),
1978 Bullpup, and 1984 (MDAM).
Terrier In active service.
W47 0.8 Megaton Warhead for Polaris A1/A2 SLBM, withdrawn
in 1974.
W48 0.1 Kiloton Artillery Fired Atomic Projectile for
155mm Gun, in active service.
W49 1.44 Megatons Warhead for Thor, Atlas and Juptiter
ICBMs, withdrawn June 1975.
W50 60/200/400 kiloton Nuclear warhead for Pershing-1A SSM.
W51 Warhead for Falcon and David Crockett,
no production units, designation changed
to W54 in January 1959.
W52 200 Kilotons (Mod-3) Warhead for Sargent SSM, withdrawn
august 1978
W53 9 Megatons Nuclear warhead for Titan-II ,
withdrawn July 1987.
W54 1 Kiloton (M-159/W-54) Atomic Demolition Munition (ADM)
Land Mine - Man Portable, total weight
150 lbs (59 lbs being the W-54) can be
emplaced by two-man team.
In active service.
W55 1 Kiloton Nuclear Depth Charge for SUBROC, still
in active service.
W56 1-2 Megatons Warhead for Minuteman II ICBM, In
active service.
W58 200 Kilotons Nuclear warhead for Polaris A-3 SLBM,
withdrawn April 1982.
W59 Warhead for Minuteman and Skybolt ICBMs
withdrawn June 1969, Skybolt program
cancelled in 1963.
W60 Development of Talos, no production units,
program cancelled in March 1964.
W62 170-200 Kilotons Nuclear warhead for Minuteman-III
In active service.
W63 Warhead for Lance SSM, no production
units, program cancelled in November 1966
W64 Warhead for Lance SSM, no production
units, program cancelled in 1964,
planned replacement the W63.
W65 Warhead for Sprint ABM, program cancelled
january 1968, planned replacement the W66.
W66 1-3 Kilotons Warhead for the Sprint ABM. Withdrawn
<Enhanced Radiation> August 1985.
W67 Warhead for Poseidon and Minuteman III,
SLBM/ICBM (Multi-Megaton).
No production units, program cancelled
December 1967.
W68 40-50 Kilotons Nuclear warhead for Poseidon SLBM ,
In active service.
W69 175-200 Kilotons Nuclear warhead for SRAM ASM, In
active service.
W70 1-100 kiloton Nuclear warhead for Lance SSM
(Mods 1,2) In active service.
Enhanced Radiation
(Mod 3)
W71 3-5 Megatons Warhead for Spartan ABM, withdrawn in
1976.
W72 5-10 Kilotons Warhead for Walleye ASM, withdrawn
September 1979
W73 Warhead for Condor , no production units,
program cancelled September 1970.
W74 Artillery Fired Atomic Projectile for
155mm Gun, no production units, program
cancelled June 1973.
W75 Artillery Fired Atomic Projectile for
8 inch Gun, no production units, program
cancelled June 1973.
W76 90-100 Kilotons Warhead for Poseidon and Trident Mk 4 RV
SLBM, In active service.
W78 335 Kilotons Warhead for Minuteman III ICBM, still
in active service.
W79 1-2 Kilotons Artillery Fired Atomic Projectile for
<Enhanced Radiation> 8 inch Gun, In active service.
W80-0 200 Kiloton Nuclear warhead for BGM 109A SLCM
In active service.
W80-1 200 Kiloton Nuclear warhead for AGM-86B ALCM
In active service
W81 1 Kiloton Nuclear warhead for Standard SM-2,
shipborne SAM, no production units,
program cancelled 1986.
W82 1-2 Kilotons Artillery Fired Atomic Projectile for
155mm Gun, scheduled for active
service in 1989.
W84 200 kiloton Nuclear warhead for BGM 109 GLCM
In active service
W85 40 kiloton Nuclear warhead for Pershing-II SSM,
(Airburst). In active service.
W86 Warhead for Pershing-II SSM,
(Earth-Penetrator), no production units,
program cancelled September 1980.
W87 300-500 Kilotons Nuclear warhead for MX (Peacekeeper)
missile. In active service.
W88 475 Kilotons Warhead for Trident D-5 SLBM,
scheduled for active service in 1989.
W89 Warhead for Sea-Lance Nuclear Depth Bomb
, no production units, program cancelled
1986. (intended as follow-up to SUBROC).
W90 Warhead for SRAM II , follow-up to W69,
scheduled for active service in 1992.
W91 300 Kilotons (+) Warhead based upon improved W87 for
Midgetman SICBM (Small ICBM)
Sources:
Title Author ISBN # Date Publisher
U.S Nuclear Weapons Chuck Hansen 0-517-56740-7 1988 Orion Books
Nuclear Weapons C. Campbell 0-89141-208-S 1984 Hamlyn
-------------------------------------------------------------------------------
Ronald William Gray
Computer Scientist
Convex Computers Ltd
European Headquarters
Randalls Research Park
Randalls Way
Leatherhead, Surrey
UNITED KINGDOM KT22 7TZ
gray@convex1.convex.com