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W78

Nuclear Warheads · United States · 1974
ADD TO COMPARE

W78

* Absolute score — assessed within category · no era adjustment
Yield
95
Yield-to-Weight Efficiency
90
Deliverability
80
Safety
70
Reliability
85
Miniaturization
80
Survivability
75
Variable-Yield Flexibility
60
Strategic Impact
95
Technology
85
Origin United States
CategoryNuclear Warheads
EraCold War
In service1974
Operators1 countries
Quantity1,083
Data Quality83%
MASS(Military Archive Scoring System)
85
Nuclear Warheads MASS Rating
2/26
Cold War
5/51
All-Time
Nuclear Warheads · 10 axes scored
Yield
95
Yield-to-Weight Efficiency
90
Deliverability
80
Safety
70
Reliability
85
Miniaturization
80
Survivability
75
Variable-Yield Flexibility
60
Strategic Impact
95
Technology
85
ⓘ Regardless of era, the same scoring system applies to all units in the nuclear warheads category.
01 / Overview
W78
Production
1974–
Quantity
1,083
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
NUCLEAR WARHEADS · COLD WAR
2
PERFORMANCE/PRICE
70
UNIT COST (2025 USD)
—
85
nuclear warheads category
ⓘ Performance/Price and MASS score are computed across all units in the nuclear warheads category, regardless of era.
02 / Specs & Design
◎General6MOD.6
  • Warhead Typethermonuclear
  • Service Entry Year1979
  • Weight159 kg
  • Length1.81 m
  • Diameter508 mm
  • In ServiceYes
▣Delivery5MOD.5
◆Production4MOD.4
  • Number Built1,083
  • Designer / LabLos Alamos National Laboratory
  • First Test1974
  • Operators1
03 / History
SERVICE LIFESPANStill in Service
  1. 1974Production started
52
years in service
1,083
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📖 TERMS ON THIS PAGE6terms
A warhead designed for integration into a Multiple Independently Targetable Reentry Vehicle delivery system.
Explosive payload of a missile, designed to inflict damage on a target.
A nuclear warhead feature that prevents detonation from a single point of impact or shock.
A device that prevents nuclear warhead detonation without authorization.
Relating to nuclear weapons that derive destructive power from both fission and fusion reactions, typically used in intercontinental ballistic missiles.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Nuclear Warheads entry →