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JRM-1 Mars
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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JRM-1Mars

Tactical Transports · United States · 1945
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JRM-1Mars

JRM-1 Mars
JRM-1 Mars Photo: U.S. Navy · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
MASS (Military Archive Scoring System) 62
* Absolute score — assessed within category · no era adjustment
Payload
75
Short / Rough-Field Capability
60
Range
80
Cargo Versatility
70
Reliability
65
Self-Protection
30
Low-Altitude Capability
50
Versatility
60
Technology
55
Cost-Effectiveness
40
Methodology ↗ → Tactical Transports ranking
Origin United States
CategoryTactical Transports
EraWorld War II
In service1945–1948
Operators1 countries
Quantity5
⬇ Overview
⚙ Specs
⊕ History
⊕ Variants
⊕ Operators
⚖ MASS Score
📚 Sources
Data Quality85%
MASS(Military Archive Scoring System)
⊟ Tactical Transportsranking ↗methodology ↗
62
Tactical Transports MASS Rating
3/26
World War II
113/215
All-Time
Tactical Transports · 10 axes scored
Payload
75
Short / Rough-Field Capability
60
Range
80
Cargo Versatility
70
Reliability
65
Self-Protection
30
Low-Altitude Capability
50
Versatility
60
Technology
55
Cost-Effectiveness
40
ⓘ Regardless of era, the same scoring system applies to all units in the tactical transports category.
01 / Overview
JRM-1 Mars
Category
Tactical Transports
Country
United States
Production
1945–1948
Quantity
5
Operators
1 countries
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
TACTICAL TRANSPORTS · WORLD WAR II
3
PERFORMANCE/PRICE
45
UNIT COST (2025 USD)
—
MASS SCORE ↗
62
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 Flight1942
  • Service Entry Year1944
  • Crew11
  • Primary Rolelong range transport
  • In ServiceNo
◈Powerplant3MOD.3
  • Engine TypeWright R-3350-24WA Cyclone engines
  • Number of Engines4
  • Power (each, turboprop)2,400 kW
▣Performance5MOD.5
◇Cargo & Capacity2MOD.2
◆Aerial Refueling1MOD.1
▤Dimensions & Weights4MOD.4
  • Length50.29 m
  • Wingspan65.53 m
  • Height13.46 m
  • Max Takeoff Weight82,000 kg
⬢Production3MOD.3
  • Total Built5
  • Operators1
  • Variants5
▲Service History4MOD.4
  • Retirement Year1956
  • Production Start1945
  • Production End1948
  • Operational StatusRetired
03 / History
SERVICE LIFESPANRetired
  1. 1938Sale: United States (6 units)
  2. 1939First deployment: World War II
  3. 1942Entered service
  4. 1945Production started
  5. 1948Production ended
81
years in service
3
years in production
5
units produced
0
countries operating
ⓘ The producing country no longer actively operates it. 1 countries retired it.
04 / Variants
▚ WEAPON FAMILY
XPB2M-1 Mars 1938
XPB2M-1 Mars 1938
XPB2M-1 Mars 1938
XPB2M-1 Mars 1938
XPB2M-1 Mars 1938
XPB2M-1 Mars 1938
JRM-1 Mars 1945
// DERIVATIVES
XPB2M-1 Mars 1938
JRM-2 Mars 1945
JRM-3 Mars 1945
05 / Operators
Operator Countries1country
United StatesRETIRED
JRM-1 MarsSALES1records
YearBuyerQuantityAmountPresent Value (2025)
1938United States6——
ⓘ "Present Value" is an estimated amount adjusted for inflation.
📖 TERMS ON THIS PAGE1terms
Unpaved / Short Field
Ability to take off and land on unpaved or short runways.
These terms are listed automatically because they appear on this page.full encyclopedia →
Tactical Transports World War II United States Glenn L. Martin Company variant
📚 Sources
📖 ENCYCLOPEDIA Browse the Tactical Transports entry →