Just so everyone knows where I'm starting from, the designs from the 'old' Filipino ships thread will remain as designed (i.e., as revised previously).
Here's my first 'indiginous' design.
I intend to build a number of these starting in Q4/1923.
(I actually designed this ship for the 'Andean Empire', and thought it was too good to file away
, so...)
MSC-1, Filipino coastal minesweeper, laid down 1923
Length, 135 ft x Beam, 27.0 ft x Depth, 3.5 ft
219 tons normal displacement (196 tons standard)
Main battery: 1 x 1.6-inch
Light battery: 1 x 0.3-inch
Weight of broadside: 2 lbs
Hull unarmored
Maximum speed for 400 shp = 12.42 knots
Approximate cruising radius, 8200 nm / 7 kts
Typical complement: 28-37
Estimated cost, $108,000 (£27,000)
Remarks:
Ship has slow, easy roll; a good, steady gun platform.
Excellent seaboat; comfortable and able to fight her guns
in the heaviest weather.
Magazines and engineering spaces are roomy, with superior
watertight subdivision.
Ship is roomy, with superior accommodation and working space.
Distribution of weights:
Percent
normal
displacement:
Machinery ........................ 13 tons = 6 pct
Hull and fittings; equipment ..... 128 tons = 59 pct
Fuel, ammunition, stores ......... 27 tons = 13 pct
Miscellaneous weights ............ 50 tons = 23 pct
-----
219 tons = 100 pct
Estimated metacentric height, 0.9 ft
Displacement summary:
Light ship: 191 tons
Standard displacement: 196 tons
Normal service: 219 tons
Full load: 236 tons
Loading submergence 74 tons/foot
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.16
Shellfire needed to sink: 1024 lbs = 529.1 x 1.6-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 1.1
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 73 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.00
Relative quality as a seaboat: 1.52
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.60
Sharpness coefficient: 0.46
Hull speed coefficient 'M' = 6.84
'Natural speed' for length = 11.6 knots
Power going to wave formation
at top speed: 49 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 47 percent
Relative accommodation and working space: 156 percent
Displacement factor: 279 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.14
(Structure weight per square
foot of hull surface: 36 lbs)
Relative longitudinal hull strength: 4.26
(for 9.0 ft average freeboard;
freeboard adjustment +2.0 ft)
Relative composite hull strength: 1.30
+++++++++++++++++++++++++
[Machine-readable parameters: Spring Style v. 1.2.1]
135.00 x 27.00 x 3.50; 9.00 -- Dimensions
0.60 -- Block coefficient
1924 -- Year laid down
12.42 / 8200 / 7.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
++++++++++
1 x 1.57; 0 -- Main battery; turrets
Central positioning of guns
:
0 -- No secondary battery
0 -- No tertiary (QF/AA) battery
1 x 0.30 -- Fourth (light) battery
0 -- No torpedo armament
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.00 -- No battery armor
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