Worldwide Artillery Fired Atomic Projectiles (AFAP)

(Updated 17 January 2013)

Soviet Union/Russian Federation

406mm Gun 2A3 (Конденсатор / Kondensator)

Weight: 570 kg
Range: 25.6 km

Reference:
Russian Wikipedia (I know..)

420mm Mortar 2B1 Oka (Трансформатор / Transformer)

Weight: 670 kg
Range:
25 km (maybe 45 km with special shells?)

Reference:
Russian Wikipedia (I know..)

180mm ZBV1 (ЗБВ1) (S-23 Gun)

Range: 45 km

Notes: Try searching for these keywords: “180-мм снаряд ЗБВ1 для 180-мм пушки С-23”

203mm ZBV2 (3БВ2) (2S7 Pion / B-4M)

Range: 18-30 km

152mm ZBV3 (ЗБВ3) (2S19 Msta-S, 2S3 Acacia, 2S5 Giatsint-S, D-20, 2A36 Giatsint-B, 2A65 Msta-B)

IOC: 1965
Range: 17.4 km
Yield: 1 kiloton

240mm ZBV4 (ЗБВ4) (2S4 Tulip / M240)

Range: 9.5 km; 18 km Rocket assisted

United States

(Picture of unknown 8-inch AFAP type.)

280mm T124 Shell / Mark 9 (M65 Atomic Cannon)

Diameter: 11” (279.4mm)
Length: 54 1/3”
Weight: 803~ pounds
Yield: 15 kilotons
Range: 24 km (26,300 yards / 14.94 miles)
Production: 80~ between April 1952 and November 1953
IOC: 1953
EOS: May 1957, replaced 1:1 by 280mm Mark 19 Shell)

Notes: The Mark 9/W9 warhead was a modified version of the TX-8/W8 bomb warhead. Time to fire from a road march (including assembly of the nuclear components into the shells) was no longer than one hour.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

280mm T315 Shell / Mark 19 (M65 Atomic Cannon)

Diameter: 11” (279.4mm)
Length: 54 1/3”
Weight: 600~ pounds
Yield:
Range: 29.9 km (32,700 yards / 18.57 miles)
Production: 80~ between July 1955 and March 1956
IOC: Unknown
EOS: 1963

Notes: Redesigned version of MK9/W9 warhead to be lighter to improve range and other features.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

16”/50 Mark 23 “Katie”

Diameter: 16” (406.4mm)
Length: 64”
Weight: 1,900~ pounds
Yield: 15 to 20 kilotons
Range: Unknown
Production: 50~
IOC: October 1956
EOS: October 1962

Notes: The US Army actually had a requirement for a 16" Nuclear shell, but then it's Coast Artillery Corps, which had 16" seacoast mounts was disbanded. a Mark 23 Mod 1 projectile was modified during the summer of 1961 for use in Project PLOWSHARES.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

240mm T332 / W32

Notes: Program began on 5 May 1954 and was cancelled May 1955.

8-Inch M422 (T317) / W33

Diameter: 8” (203mm)
Length: 37”
Weight: 243~ pounds
Yield: 1 kT, Unknown setting between 5-10 kT, and 40 kT
Production: 2,000~ built between 1957-1965.
IOC: 1957
EOS: Dissassembly began in 1983.

Notes: Two variants were produced, Mod 0 and 1. Projectiles were hand-assembled in the field to the desired yield, with three different internal assemblies for each yield. The internal cavity of the nuclear gun assembly mechanism is 5.5” in diameter and 22” long. Replaced in the national stockpile by the M753 / W79 shells.

(Photograph of Mk 33 / M422 AFAP)

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

155mm M454 / W48

Diameter: 6.1” (155mm)
Length: 34”
Weight: 128~ pounds
Type: Pu 239 Linear Implosion
Yield: 100~ tons
Production:
    135 x Mod 0: October 1963-1968
    925 x Mod 1 1965-1969
    1,060 total 1963-1969.

EOS:
    Mod 0: Began January 1965, complete 1969.

(Photograph of W48 / M454 AFAP Cutaway Model)

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

155mm W74

Type: Pu 239
Yield:
2 yields, both in excess of 100 tons

Notes: Developed 1969-June 1973. Canceled due to excessive cost ($452,000 per shell in 1974) and dated technology.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

203mm W75

Notes: Developed 1970-June 1973. Canceled due to excessive cost and dated technology.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

8-Inch M753 / W79 (Enhanced Radiation)

Diameter: 8” (203mm)
Length: 43”
Weight: 215~ pounds
Type: Pu 239/Uranium + Tritium Boosted
Yield: Three Yields (Few hundred tons to 2 kT) (50:50 Fission/Fusion at lower yield up to 25:75 at high yield)
Production: July 1981 – August 1986. 550 built. (325 “Enhanced Radiation”, 225 “Standard Fission”)

Notes: Includes a rocket motor that can be toggled on to double range to 18 miles when necessary.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen

155mm M785 / W82 (Enhanced Radiation)

Diameter: 6.1” (155mm)
Length: 34”
Weight: 95~ pounds
Yield: Less than 2 kT
Production: 1,000 would have been built starting in 1989.

Notes: Would have cost about ten times that of the 155mm M454 / W48 round it would have replaced. Cancelled.

References:
U.S. Nuclear Weapons: The Secret History by Chuck Hansen