Data Quality85%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
Dragonfly-class river gunboat
Category
Country
Prime contractor
Production
1938–1938
Quantity
5
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · INTERWAR PERIOD
21
PERFORMANCE/PRICE
57
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the patrol boats & fast attack craft category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
- Hull ClassificationRiver gunboat
- Ship TypeRiver gunboat
- Builder / ShipyardVosper Thornycroft, Yarrow Shipbuilders, J S White
- Laid Down1937
- Commissioned1938
- Ships in Class5
- In ServiceYes
◈Displacement2MOD.2
- Light Displacement594 t
- Full Load Displacement594.36 t
▣Dimensions3MOD.3
- Length (overall)60 m
- Beam10.1 m
- Draft1.5 m
◇Complement1MOD.1
- Total Complement74
◆Propulsion7MOD.7
- Propulsion Type2 shafts; 2 geared steam turbines
- Arrangement (CODAG/COGAG…)2 shafts, 2 geared steam turbines
- Number of Engines2
- Shaft Power2,833.66 kW
- Shafts / Screws2
- Top Speed17 kn
- Nuclear-PoweredNo
▤Gun Armament4MOD.4
- Main Gun2 × 4‑inch (101.6 mm) guns
- Main Gun Calibre102 mm
- Main Gun Count2
- Secondary Guns1 × 3.7‑inch (94 mm) howitzer, 8 × machine guns
⬢Missile Armament4MOD.4
▲Underwater Warfare4MOD.4
- Torpedo Tubes0
- ASW CapabilityNo
- Hull-Mounted SonarNo
- Towed Array SonarNo
◎Aviation5MOD.5
- Embarked Helicopters0
- HangarNo
- Flight DeckNo
- Fixed-Wing Aircraft0
- UAV CapabilityNo
◈Sensors & Combat Systems3MOD.3
▣Survivability4MOD.4
◇Fleet Status6MOD.6
- Completed5
- Under Construction0
- Planned6
- Cancelled1
- Lost4
- Retired1
03 / History
SERVICE LIFESPANStill in Service
- 1938Production started
- 1939First deployment: World War II
88
years in service
0
years in production
5
units produced
1
countries operating
ⓘ The producing country still actively operates it.
05 / MASS Score
PATROL BOATS & FAST ATTACK CRAFT RANKING Patrol Boats & Fast Attack Craft · Interwar Period
MASS RANKINGSMASS ↗
248PATROL BOATS & FAST ATTACK CRAFT21INTERWAR PERIOD · PATROL BOATS & FAST ATTACK CRAFT768UNITED KINGDOM · ALL WEAPONS336PERFORMANCE/PRICE · PATROL BOATS & FAST ATTACK CRAFT
ⓘ Rankings are within thePatrol Boats & Fast Attack Craftcategory.
📚 Sources