WesWorld

Based on an early analysis of lessions from the 'Revolution' combined with the MdF's 'New Direction' plans (which will be revealed in due course ;-) ...)

MN30, Filipino Monitor laid down 1930

Displacement:
3,971 t light; 4,138 t standard; 4,540 t normal; 4,862 t full load

Dimensions: Length overall / water x beam x draught
334.65 ft / 328.08 ft x 65.62 ft (Bulges 98.43 ft) x 8.20 ft (normal load)
102.00 m / 100.00 m x 20.00 m (Bulges 30.00 m) x 2.50 m

Armament:
3 - 8.27" / 210 mm guns (1x3 guns), 286.60lbs / 130.00kg shells, 1928 Model
Breech loading guns in a turret (on a barbette)
on centreline forward, all raised guns
2 - 2.95" / 75.0 mm guns (1x2 guns), 13.23lbs / 6.00kg shells, 1930 Model
Dual purpose guns in a turret (on a barbette)
on centreline aft
4 - 1.38" / 35.0 mm guns (2x2 guns), 1.32lbs / 0.60kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts
16 - 0.54" / 13.7 mm guns (4x4 guns), 0.11lbs / 0.05kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread

Weight of broadside 893 lbs / 405 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 246.06 ft / 75.00 m 9.84 ft / 3.00 m
Ends: 0.79" / 20 mm 82.02 ft / 25.00 m 9.84 ft / 3.00 m
Main Belt covers 115 % of normal length

- Torpedo Bulkhead and Bulges:
0.98" / 25 mm 246.06 ft / 75.00 m 7.87 ft / 2.40 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 1.97" / 50 mm 1.97" / 50 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
3rd: 0.79" / 20 mm - -
4th: 0.59" / 15 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 3.15" / 80 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 10,000 shp / 7,460 Kw = 18.43 kts
Range 10,000nm at 10.00 kts (Bunkerage = 724 tons)

Complement:
276 - 359

Cost:
£1.145 million / $4.580 million

Distribution of weights at normal displacement:
Armament: 110 tons, 2.4 %
Armour: 994 tons, 21.9 %
- Belts: 230 tons, 5.1 %
- Torpedo bulkhead: 71 tons, 1.6 %
- Armament: 102 tons, 2.2 %
- Armour Deck: 573 tons, 12.6 %
- Conning Tower: 19 tons, 0.4 %
Machinery: 303 tons, 6.7 %
Hull, fittings & equipment: 2,415 tons, 53.2 %
Fuel, ammunition & stores: 569 tons, 12.5 %
Miscellaneous weights: 150 tons, 3.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,542 lbs / 4,328 Kg = 33.8 x 8.3 " / 210 mm shells or 3.7 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 3.8 ft / 1.1 m
Roll period: 21.3 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.600
Length to Beam Ratio: 3.33 : 1
'Natural speed' for length: 18.11 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 94
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.04 ft / 5.50 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (55 %): 18.04 ft / 5.50 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 15.09 ft / 4.60 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 65.0 %
- Above water (accommodation/working, high = better): 163.2 %
Waterplane Area: 15,745 Square feet or 1,463 Square metres
Displacement factor (Displacement / loading): 173 %
Structure weight / hull surface area: 109 lbs/sq ft or 532 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 2.11
- Overall: 1.01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

What about these instead? Its fine for a floating artillery platform but not much else. Fairly idiot proof, with reciprocating engines that could be run on wood. No fancy mounting here, just a big howitzer mounted onto a barge.

Monitor laid down 1930

Displacement:
593 t light; 630 t standard; 636 t normal; 640 t full load

Dimensions: Length overall / water x beam x draught
164.04 ft / 164.04 ft x 65.62 ft x 2.30 ft (normal load)
50.00 m / 50.00 m x 20.00 m x 0.70 m

Armament:
1 - 9.45" / 240 mm guns in single mounts, 440.92lbs / 200.00kg shells, 1930 Model
Breech loading gun in deck mount
on centreline forward
Weight of broadside 441 lbs / 200 kg
Shells per gun, main battery: 100

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Geared drive, 1 shaft, 100 ihp / 75 Kw = 5.95 kts
Range 300nm at 5.95 kts
Bunker at max displacement = 10 tons (100% coal)

Complement:
63 - 82

Cost:
£0.276 million / $1.102 million

Distribution of weights at normal displacement:
Armament: 53 tons, 8.3 %
Machinery: 6 tons, 1.0 %
Hull, fittings & equipment: 534 tons, 84.0 %
Fuel, ammunition & stores: 43 tons, 6.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,705 lbs / 1,227 Kg = 6.4 x 9.4 " / 240 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.65
Metacentric height 6.1 ft / 1.9 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 0.72

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.900
Length to Beam Ratio: 2.50 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 13 %
Trim (Max stability = 0, Max steadiness = 100): 70
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: 7.22 ft / 2.20 m
- Forecastle (20 %): 7.22 ft / 2.20 m
- Mid (50 %): 7.22 ft / 2.20 m
- Quarterdeck (15 %): 7.22 ft / 2.20 m
- Stern: 7.22 ft / 2.20 m
- Average freeboard: 7.22 ft / 2.20 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 65.8 %
- Above water (accommodation/working, high = better): 226.5 %
Waterplane Area: 10,379 Square feet or 964 Square metres
Displacement factor (Displacement / loading): 146 %
Structure weight / hull surface area: 52 lbs/sq ft or 253 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.40
- Overall: 1.01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

It's interesting, but I'm not sure I'd want to be on one in a Filipino typhoon...

Monitors are usually coastal ships, and with 0,7m draught you can go just about anywhere. Maybe a bit large for a riverine craft though.

This is the Phillapines. Its all islands and waterways in the direct path of typhoons every few years. You don't want a frail gunboat out there, nor a true riverine craft when you are talking about cruiser guns.

The craft should be reasonably close whilst in the lee of islands, and it can get very very close to the shore, wading depth. Artificially beach her until the typhoon passes over?