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Lockheed US-3A Viking
Photo: U.S. Navy · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
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LockheedUS-3AViking

Tactical Transports · United States · 1961
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LockheedUS-3AViking

⚙ Lockheed S-3 Viking variant
Lockheed US-3A Viking
Lockheed US-3A Viking Photo: U.S. Navy · 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
60
Short / Rough-Field Capability
50
Range
55
Cargo Versatility
65
Reliability
70
Self-Protection
30
Low-Altitude Capability
60
Versatility
70
Technology
65
Cost-Effectiveness
55
Origin United States
ManufacturerLockheed Corporation
CategoryTactical Transports
EraEarly Cold War
In service1961
Operators1 countries
Quantity10
Data Quality84%
MASS(Military Archive Scoring System)
58
Tactical Transports MASS Rating
35/60
Early Cold War
135/215
All-Time
Tactical Transports · 10 axes scored
Payload
60
Short / Rough-Field Capability
50
Range
55
Cargo Versatility
65
Reliability
70
Self-Protection
30
Low-Altitude Capability
60
Versatility
70
Technology
65
Cost-Effectiveness
55
ⓘ Regardless of era, the same scoring system applies to all units in the tactical transports category.
01 / Overview
Lockheed US-3A Viking
Prime contractor
Production
1961–
Quantity
10
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
TACTICAL TRANSPORTS · EARLY COLD WAR
35
PERFORMANCE/PRICE
50
UNIT COST (2025 USD)
—
58
tactical transports category
ⓘ Performance/Price and MASS score are computed across all units in the tactical transports category, regardless of era.
02 / Specs & Design
◎General5MOD.5
  • First Flight1958
  • Service Entry Year1961
  • Crew4
  • Primary RoleTactical Transport
  • In ServiceNo
◈Powerplant2MOD.2
  • Engine TypeTurboprop
  • Number of Engines4
▣Performance4MOD.4
  • Cruise Speed480 km/h
  • Top Speed550 km/h
  • Service Ceiling9,100 m
  • Maximum Range3,500 km
◇Cargo & Capacity3MOD.3
◆Dimensions & Weights5MOD.5
  • Length30.5 m
  • Wingspan32.8 m
  • Height8.5 m
  • Empty Weight18,000 kg
  • Max Takeoff Weight30,000 kg
▤Production1MOD.1
  • Total Built10
⬢Service History1MOD.1
  • Retirement Year1990
03 / History
SERVICE LIFESPANStill in Service
  1. 1961Production started
65
years in service
10
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📚 Sources
📖 ENCYCLOPEDIA Browse the Tactical Transports entry →