Römorkörler (Tugboats)

[Guinness]

Tophane Class - 1904
R-1 Tophane, laid down 1904
R-2 Boyana, laid down 1904
R-3 Çatalca, laid down 1904
R-4 Oltanica, laid down 1904
R-5 Suda, laid down 1904
R-6 Seref Nüma, laid down 1904

[Guinness]

R-1 Tophane, laid down 1904
R-2 Boyana, laid down 1904
R-3 Çatalca, laid down 1904
R-4 Oltanica, laid down 1904
R-5 Suda, laid down 1904
R-6 Seref Nüma, laid down 1904

Tophane, Ottoman tugboat laid down 1904

Displacement:
89 t light; 92 t standard; 109 t normal; 123 t full load

Dimensions: Length overall / water x beam x draught
79.72 ft / 79.72 ft x 16.73 ft x 4.92 ft (normal load)
24.30 m / 24.30 m x 5.10 m x 1.50 m

Armament:
2 - 0.59" / 15.0 mm guns (1x2 guns), 0.10lbs / 0.05kg shells, 1904 Model
Machine guns in deck mount
on side amidships
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 100

Armour:

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 250 ihp / 187 Kw = 11.84 kts
Range 3,000nm at 8.00 kts
Bunker at max displacement = 31 tons (100% coal)

Complement:
16 - 21

Cost:
£0.009 million / $0.037 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 0 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 43 tons, 39.3 %
Hull, fittings & equipment: 32 tons, 29.0 %
Fuel, ammunition & stores: 19 tons, 17.9 %
Miscellaneous weights: 15 tons, 13.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
76 lbs / 34 Kg = 737.5 x 0.6 " / 15 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 0.5 ft / 0.2 m
Roll period: 9.8 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.38

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.580
Length to Beam Ratio: 4.76 : 1
'Natural speed' for length: 8.93 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 54
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: 9.81 ft / 2.99 m
- Forecastle (20 %): 6.23 ft / 1.90 m
- Mid (55 %): 6.23 ft / 1.90 m
- Quarterdeck (15 %): 6.23 ft / 1.90 m
- Stern: 6.23 ft / 1.90 m
- Average freeboard: 6.52 ft / 1.99 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 142.4 %
- Above water (accommodation/working, high = better): 69.3 %
Waterplane Area: 933 Square feet or 87 Square metres
Displacement factor (Displacement / loading): 108 %
Structure weight / hull surface area: 20 lbs/sq ft or 96 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.84
- Longitudinal: 6.09
- Overall: 1.03
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily