WesWorld

Another ship for 1932.

The FF-1 class frigates where good ships. But they where considered to big and expensive for their role. The RAN decided to go with a smaller ship that could be mass produced in case of war. The FF-11 was the result. Based heavily on the FF-1 class, the FF-11 is 150 tons cheaper, they carry one less 120mm gun and 2 less 40mm guns. The FF-11 will also be built in a Multi Purpose Version with a quarterdeck and only one 120mm gun.


FF-11, Australia Frigate laid down 1932

Displacement:
701 t light; 730 t standard; 974 t normal; 1,168 t full load

Dimensions: Length overall / water x beam x draught
250.00 ft / 250.00 ft x 29.00 ft x 10.00 ft (normal load)
76.20 m / 76.20 m x 8.84 m x 3.05 m

Armament:
2 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1932 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.88kg shells, 1932 Model
Anti-aircraft guns in deck mount
on centreline amidships
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 109 lbs / 49 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 9,396 shp / 7,009 Kw = 24.20 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 438 tons

Complement:
86 - 113

Cost:
£0.340 million / $1.360 million

Distribution of weights at normal displacement:
Armament: 14 tons, 1.4 %
Armour: 6 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 277 tons, 28.5 %
Hull, fittings & equipment: 394 tons, 40.5 %
Fuel, ammunition & stores: 272 tons, 28.0 %
Miscellaneous weights: 10 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,334 lbs / 605 Kg = 25.7 x 4.7 " / 119 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.3 ft / 0.4 m
Roll period: 10.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.15
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.470
Length to Beam Ratio: 8.62 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 64 %
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: 15.00 ft / 4.57 m
- Forecastle (20 %): 12.00 ft / 3.66 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 11.92 ft / 3.63 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 104.7 %
- Above water (accommodation/working, high = better): 122.2 %
Waterplane Area: 4,703 Square feet or 437 Square metres
Displacement factor (Displacement / loading): 143 %
Structure weight / hull surface area: 45 lbs/sq ft or 219 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 3.35
- Overall: 1.05
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

Not a bad little escort - is there merit in trimming the length to 70 m to facilitate construction in class zero slips?

Adding some miscelleanoues weight - ~20 t - would allow for a more complete ASW suite; you have the hull strength for it.

I dont have any Type 0 slips or docks so length isnt a problem.

I can easily add 15 more tons of misc weight, so will do.

If you can do it, I'd strongly suggest making 'em fit in Type 0 slips (and particularly docks) - that way they'll be easier to find docks for if damaged. These things happen at the damndest times...

Well there are only 2 Type 0 docks in the Pacific at Singapore, and theres 4 other bigger docks there. Reducing their length means sacrificing some important stuff so Ill take my chances.