Make your own free website on Tripod.com
Fantasy Fleet Page
Roza class Corvettes
Home
French Strategic Resources
French Coast Defenses
Russian Coast Defenses
The Fleet of the Republic of France
Port Facilities of the Republic of France
French Atlantic Fleet
French Indian Ocean Flotilla
French Mediterranian Fleet
French Pacific Fleet
French ships under construction
Obsolete French ships
French Ship Designs
French Naval Guns
Russian Federation Port Facilities
Russian Federation Fleet, as of 1/1/1921
Russian Federation Baltic Sea Fleet
Russian Federation Black Sea Fleet
Russian Federation Northern Fleet
Russian Federation Pacific Fleet
Russian Federation Caspian Sea Flotilla
Russian River Flotillas
Russian Federation ships under construction
Obsolete Russian ships
Russian Ship Designs
Russian Naval Guns
Treaty tables

High speed is the outstanding capability of the Roza class

Roza class corvettes, laid down 1923

Length, 70.0 m x Beam, 7.0 m x Depth, 3.0 m
667 tonnes normal displacement (610 tonnes standard)

Main battery: 3 x 10.0-cm
AA battery: 2 x 3.7-cm
Light battery: 4 x 1.3-cm

Weight of broadside: 43 kg

4 TT, 53.0 cm in a single quadruple mount

15 tons depth charges/mines

Hull unarmored

Battery armor:
Main, 2.5 cm shields
AA, 2.5 cm shields

Maximum speed for 16312 shaft kw = 31.00 knots
Approximate cruising radius, 3400 nm / 12 knots

Typical complement: 66-85


Estimated cost, $921,000 (230,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Ship has slow, easy roll; a good, steady gun platform.

Good seaboat; rides out heavy weather easily.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 12 tonnes = 2 pct
Armor, total ..................... 4 tonnes = 1 pct

Armament 4 tonnes = 1 pct

Machinery ........................ 347 tonnes = 52 pct
Hull and fittings; equipment ..... 211 tonnes = 32 pct
Fuel, ammunition, stores ......... 78 tonnes = 12 pct
Miscellaneous weights ............ 15 tonnes = 2 pct
-----
667 tonnes = 100 pct

Estimated metacentric height, 0.2 m

Displacement summary:

Light ship: 589 tonnes
Standard displacement: 610 tonnes
Normal service: 667 tonnes
Full load: 710 tonnes

Loading submergence 289 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.08

Shellfire needed to sink: 82 kg = 5.9 x 10.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 70 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.47

Relative quality as a seaboat: 1.21

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.45
Sharpness coefficient: 0.31
Hull speed coefficient 'M' = 8.03
'Natural speed' for length = 15.2 knots
Power going to wave formation
at top speed: 74 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 184 percent

Relative accommodation and working space: 92 percent


Displacement factor: 42 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre of hull surface: 143 kg)

Relative longitudinal hull strength: 2.94
(for 4.57 m average freeboard;
freeboard adjustment +1.89 m)

Relative composite hull strength: 0.59

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

229.60 x 22.96 x 9.84; 15.00 -- Dimensions
0.45 -- Block coefficient
1923 -- Year laid down
31.00 / 3400 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
15 tons -- Miscellaneous weights
++++++++++
3 x 3.94; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
0 -- No secondary battery
2 x 1.46 -- Tertiary (QF/AA) battery
Gun-shields
:
4 x 0.51 -- Fourth (light) battery
4 / 0 / 20.87 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.98 / 0.00 / 0.98 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


+++++++++++++++++++++++++++++++++++++++++++++++++++++++


Enter supporting content here