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Clown-class gunboat
Photo: George Dodd · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
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Clown-classgunboat

Patrol Boats & Fast Attack Craft · United Kingdom · 1856
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Clown-classgunboat

Clown-class gunboat
Clown-class gunboat Photo: George Dodd · 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) 36
* Absolute score — assessed within category · no era adjustment
Speed
30
Firepower
40
Agility
35
Sensors
10
Range
30
Sea-Keeping
40
Affordability
60
Survivability
45
Versatility
50
Technology
35
Methodology ↗ → Patrol Boats & Fast Attack Craft ranking
Origin United Kingdom
CategoryPatrol Boats & Fast Attack Craft
EraPre-WWI / Industrial Age
In service1856–1856
Operators1 countries
Quantity12
⬇ Overview
⚙ Specs
⊕ History
⊕ Operators
⚖ MASS Score
📚 Sources
Data Quality86%
MASS(Military Archive Scoring System)
⊟ Patrol Boats & Fast Attack Craftranking ↗methodology ↗
36
Patrol Boats & Fast Attack Craft MASS Rating
31/114
Pre-WWI / Industrial Age
236/387
All-Time
Patrol Boats & Fast Attack Craft · 10 axes scored
Speed
30
Firepower
40
Agility
35
Sensors
10
Range
30
Sea-Keeping
40
Affordability
60
Survivability
45
Versatility
50
Technology
35
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
Clown-class gunboat
Category
Patrol Boats & Fast Attack Craft
Country
United Kingdom
Production
1856–1856
Quantity
12
Operators
1 countries
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · PRE-WWI / INDUSTRIAL AGE
31
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
MASS SCORE ↗
36
patrol boats & fast attack craft category
ⓘ 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 Classificationwooden‑hulled
  • Ship TypeCrimean gunboat
  • Builder / Shipyardmultiple British shipyards (e.g., W & H Pitcher, Pembroke Dockyard, etc.)
  • Launched1856
  • Commissioned1856
  • Ships in Class12
  • In ServiceNo
◈Dimensions3MOD.3
  • Length (overall)33.5 m
  • Beam6.55 m
  • Draft1.22 m
▣Complement1MOD.1
  • Total Complement30
◇Propulsion7MOD.7
  • Propulsion Type*1-cylinder horizontal direct-acting single-expansion steam engine *Single screw
  • Arrangement (CODAG/COGAG…)single‑screw
  • Number of Engines1
  • Shaft Power30 kW
  • Shafts / Screws1
  • Top Speed7.5 kn
  • Nuclear-PoweredNo
◆Gun Armament3MOD.3
  • Main Gun1 × 68‑pounder smooth‑bore muzzle‑loading cannon
  • Main Gun Count1
  • Secondary Guns1 × 32‑pounder smooth‑bore muzzle‑loading cannon
▤Missile Armament3MOD.3
⬢Underwater Warfare3MOD.3
▲Aviation3MOD.3
◎Sensors & Combat Systems3MOD.3
◈Survivability5MOD.5
▣Fleet Status2MOD.2
  • Completed12
  • Lost2
03 / History
SERVICE LIFESPANRetired
  1. 1853First deployment: Crimean War
  2. 1856Production started
170
years in service
0
years in production
12
units produced
0
countries operating
ⓘ 1 countries retired it.
04 / Operators
Operator Countries1country
United KingdomRETIRED
Patrol Boats & Fast Attack Craft Pre-WWI / Industrial Age United Kingdom
📚 Sources
📖 ENCYCLOPEDIA Browse the Patrol Boats & Fast Attack Craft entry →