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Aichi AB-4
Photo: retouch: CAPRI-1 (talk). · Wikimedia Commons · Public domain
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AichiAB-4

Maritime Patrol & ASW Aircraft · Japan · 1931
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AichiAB-4

Aichi AB-4
Aichi AB-4 Photo: retouch: CAPRI-1 (talk). · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
ASW Effectiveness
10
Sensor Suite
15
Endurance
30
Range
25
Weapons Payload
5
Sonobuoy Capability
0
Search Coverage
20
Reliability
40
Technology
10
Cost-Effectiveness
60
Origin Japan
ManufacturerAichi
CategoryMaritime Patrol & ASW Aircraft
EraInterwar Period
In service1931–1932
Operators1 countries
Quantity6
Data Quality84%
17
Maritime Patrol & ASW Aircraft MASS Rating
28/30
Interwar Period
126/130
All-Time
Maritime Patrol & ASW Aircraft · 10 axes scored
ASW Effectiveness
10
Sensor Suite
15
Endurance
30
Range
25
Weapons Payload
5
Sonobuoy Capability
0
Search Coverage
20
Reliability
40
Technology
10
Cost-Effectiveness
60
ⓘ Regardless of era, the same scoring system applies to all units in the maritime patrol & asw aircraft category.
01 / Overview
Aichi AB-4
Country
Prime contractor
Production
1931–1932
Quantity
6
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MARITIME PATROL & ASW AIRCRAFT · INTERWAR PERIOD
28
PERFORMANCE/PRICE
75
UNIT COST (2025 USD)
—
17
maritime patrol & asw aircraft category
ⓘ Performance/Price and MASS score are computed across all units in the maritime patrol & asw aircraft category, regardless of era.
02 / Specs & Design
◎General5MOD.5
  • Base Airframeflying boat
  • Mission TypeNight reconnaissance
  • Service Entry Year1932
  • Flight Crew3
  • In ServiceNo
◈Powerplant2MOD.2
  • Engine TypeGasuden Urakaze
  • Number of Engines1
▣Performance2MOD.2
  • Cruise Speed113 km/h
  • Service Ceiling3,500 m
◆Armament (ASW/Strike)2MOD.2
▤Dimensions3MOD.3
  • Length9.75 m
  • Wingspan13.5 m
  • Max Takeoff Weight2,600 kg
⬢Production2MOD.2
  • Total Built6
  • Operators2
▲Service History2MOD.2
  • Production Start1931
  • Operational StatusPrototype
03 / History
SERVICE LIFESPANStill in Service
  1. 1931Production started
  2. 1932Production ended
95
years in service
1
years in production
6
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Inventory1country · 1units
1active
📚 Sources
📖 ENCYCLOPEDIA Browse the Maritime Patrol & ASW Aircraft entry →