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Fantasy Fleet Page
P-27 class Patrol Ship
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P-27 class features improved speed and endurance.

Russian Patrol ship laid down 1927

Displacement:
270 t light; 283 t standard; 333 t normal; 373 t full load

Dimensions: Length overall / water x beam x draught
154.20 ft / 154.20 ft x 25.59 ft x 5.91 ft (normal load)
47.00 m / 47.00 m x 7.80 m x 1.80 m

Armament:
2 - 3.94" / 100 mm guns in single mounts, 37.48lbs / 17.00kg shells, 1927 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1927 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1927 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 81 lbs / 37 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm - -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 1,934 shp / 1,443 Kw = 18.00 kts
Range 4,300nm at 12.00 kts (Bunkerage = 89 tons)

Complement:
38 - 50

Cost:
0.091 million / $0.364 million

Distribution of weights at normal displacement:
Armament: 8 tons, 2.5 %
Armour: 5 tons, 1.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.4 %
Machinery: 61 tons, 18.3 %
Hull, fittings & equipment: 145 tons, 43.4 %
Fuel, ammunition & stores: 63 tons, 19.0 %
Miscellaneous weights: 50 tons, 15.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
573 lbs / 260 Kg = 18.8 x 3.9 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 6.03 : 1
'Natural speed' for length: 12.42 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.55 ft / 5.35 m
- Forecastle (20 %): 13.12 ft / 4.00 m
- Mid (50 %): 13.12 ft / 4.00 m (6.56 ft / 2.00 m aft of break)
- Quarterdeck (15 %): 6.56 ft / 2.00 m
- Stern: 6.56 ft / 2.00 m
- Average freeboard: 10.20 ft / 3.11 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.1 %
- Above water (accommodation/working, high = better): 126.4 %
Waterplane Area: 2,629 Square feet or 244 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 33 lbs/sq ft or 160 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 5.09
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily


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