WesWorld

Filipino RT-1 class Tugboat, laid down 1927

Displacement:
157 t light; 162 t standard; 215 t normal; 258 t full load

Dimensions: Length overall / water x beam x draught
82.25 ft / 82.25 ft x 20.00 ft x 8.75 ft (normal load)
25.07 m / 25.07 m x 6.10 m x 2.67 m

Armament:
3 - 0.98" / 25.0 mm guns (1x3 guns), 0.57lbs / 0.26kg shells, 1927 Model
Anti-aircraft guns in deck mount
on centreline forward
2 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1927 Model
Machine guns in deck mounts
on side, all aft, all raised mounts - superfiring

Weight of broadside 2 lbs / 1 kg
Shells per gun, main battery: 300

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.55" / 14 mm - -

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 396 shp / 296 Kw = 12.00 kts
Range 4,500nm at 12.00 kts (Bunkerage = 96 tons)

Complement:
27 - 36

Cost:
£0.027 million / $0.108 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.1 %
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: 13 tons, 5.8 %
Hull, fittings & equipment: 134 tons, 62.4 %
Fuel, ammunition & stores: 58 tons, 26.9 %
Miscellaneous weights: 10 tons, 4.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
960 lbs / 435 Kg = 2,013.3 x 1.0 " / 25 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 0.5 ft / 0.2 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.64

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.523
Length to Beam Ratio: 4.11 : 1
'Natural speed' for length: 9.07 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 43
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: 12.00 ft / 3.66 m
- Forecastle (20 %): 10.00 ft / 3.05 m
- Mid (65 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 9.01 ft / 2.75 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 26.5 %
- Above water (accommodation/working, high = better): 68.6 %
Waterplane Area: 1,119 Square feet or 104 Square metres
Displacement factor (Displacement / loading): 584 %
Structure weight / hull surface area: 58 lbs/sq ft or 282 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.81
- Longitudinal: 34.34
- Overall: 2.43
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Well, it is smaller than those thugs... I mean tugs that I designed.
An interesting design. Useful? Not as a warship, but then, it is not a warship.

Shes quite a nice design, however her armament seems a tad heavy for a tug which may hamper her role in that reguard.

Still shes a nice little design.