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North American XB-70 Valkyrie
Photo: US Air Force · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
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NorthAmericanXB-70Valkyrie

Strategic Bombers · United States · 1969
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NorthAmericanXB-70Valkyrie

North American XB-70 Valkyrie
North American XB-70 Valkyrie Photo: US Air Force · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
* Absolute score — assessed within category · no era adjustment
Payload
85
Range
80
Penetration / Survivability
70
Nuclear Capability
90
Stand-Off Capability
75
Avionics
60
Stealth
20
Reliability
30
Strategic Impact
70
Cost-Effectiveness
10
Origin United States
CategoryStrategic Bombers
EraCold War
In service1969–1969
Operators1 countries
Quantity2
Data Quality83%
MASS(Military Archive Scoring System)
70
Strategic Bombers MASS Rating
7/8
Cold War
28/163
All-Time
Strategic Bombers · 10 axes scored
Payload
85
Range
80
Penetration / Survivability
70
Nuclear Capability
90
Stand-Off Capability
75
Avionics
60
Stealth
20
Reliability
30
Strategic Impact
70
Cost-Effectiveness
10
ⓘ Regardless of era, the same scoring system applies to all units in the strategic bombers category.
01 / Overview
North American XB-70 Valkyrie
Production
1969–1969
Quantity
2
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
STRATEGIC BOMBERS · COLD WAR
7
PERFORMANCE/PRICE
5
UNIT COST (2025 USD)
—
70
strategic bombers category
ⓘ Performance/Price and MASS score are computed across all units in the strategic bombers category, regardless of era.
02 / Specs & Design
◎General5MOD.5
  • First Flight1964
  • Crew2
  • Primary RolePrototype supersonic strategic bomber
  • Generation3rd
  • In ServiceNo
◈Powerplant6MOD.6
▣Performance3MOD.3
  • Top Speed3,255 km/h
  • Top Speed (Mach)3.08 Mach
  • Service Ceiling22,555 m
◇Dimensions & Weights4MOD.4
  • Length59.13 m
  • Wingspan32 m
  • Height9.14 m
  • Wing Area585
⬢Production3MOD.3
  • Total Built2
  • Operators1
  • Variants4
▲Service History4MOD.4
  • Retirement Year1969
  • Production Start1964
  • Production End1969
  • Operational StatusRetired
03 / History
SERVICE LIFESPANStill in Service
  1. 1964Entered service
  2. 1969Production started
57
years in service
0
years in production
2
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Inventory1country · 2units
2active
📖 TERMS ON THIS PAGE4terms
An afterburner is a device that injects fuel into a jet engine's hot exhaust gases, generating additional thrust through combustion.
An internal compartment within a military aircraft designed to store and deploy weapons, reducing radar cross-section and aerodynamic drag.
Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.
Supercruise is the ability of an aircraft to sustain supersonic speed in level flight without using afterburner.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Strategic Bombers entry →