WesWorld

[size=3]Jeddah Class Sloop[/size]

Three ex-Bharati sloops were refitted and sold to Hedjaz in 1940/41, giving the small Hedjazi navy an ability to police traffic throughout the Red Sea as required.

Jeddah, ex-Cuddalore, laid down 1922
Jizan, ex-Proddatur, laid down 1922
As Salif, ex-Warangel, laid down 1922

S-101, laid down 1921, refitted/transferred 1940/41

Length, 76.2 m x Beam, 10.1 m x Depth, 2.7 m
1061 tonnes normal displacement (925 tonnes standard)

Main battery: 3 x 10.5-cm
Secondary battery: 4 x 3.5-cm
AA battery: 2 x 1.5-cm

Weight of broadside: 51 kg

Main belt, 5.0 cm; ends unarmored
Armor deck, average 2.0 cm
Conning tower, 5.0 cm

Battery armor:
Main, 5.0 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 4997 shaft kw = 21.81 knots
Approximate cruising radius, 6000 nm / 12 knots

Typical complement: 93-121


Estimated cost, $766,000 (£192,000)

Remarks:

Relative extent of belt armor, 87 percent of 'typical' coverage.

Ship has slow, easy roll; a good, steady gun platform.

Good seaboat; rides out heavy weather easily.

Ship is roomy, with superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 14 tonnes = 1 pct
Armor, total ..................... 169 tonnes = 16 pct

Belt 81 tonnes = 8 pct
Deck 76 tonnes = 7 pct
C.T. 4 tonnes = 0 pct
Armament 8 tonnes = 1 pct

Machinery ........................ 231 tonnes = 22 pct
Hull and fittings; equipment ..... 430 tonnes = 41 pct
Fuel, ammunition, stores ......... 167 tonnes = 16 pct
Miscellaneous weights ............ 50 tonnes = 5 pct
-----
1061 tonnes = 100 pct

Estimated metacentric height, 0.4 m

Displacement summary:

Light ship: 894 tonnes
Standard displacement: 925 tonnes
Normal service: 1061 tonnes
Full load: 1165 tonnes

Loading submergence 486 tonnes/metre

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Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.20

Shellfire needed to sink: 865 kg = 53.9 x 10.5-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.8
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 71 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.12

Relative quality as a seaboat: 1.41

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Hull form characteristics:

Block coefficient: 0.50
Sharpness coefficient: 0.36
Hull speed coefficient 'M' = 7.49
'Natural speed' for length = 15.8 knots
Power going to wave formation
at top speed: 60 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 86 percent

Relative accommodation and working space: 139 percent


Displacement factor: 134 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.92
(Structure weight per square
metre of hull surface: 240 kg)

Relative longitudinal hull strength: 2.62
(for 4.00 m average freeboard;
freeboard adjustment +1.05 m)

Relative composite hull strength: 1.02

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[Machine-readable parameters: Spring Style v. 1.2.1]

250.00 x 33.00 x 9.00; 13.12 -- Dimensions
0.50 -- Block coefficient
1921 -- Year laid down
21.81 / 6000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
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3 x 4.13; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
4 x 1.38; 0 -- Secondary battery; turrets
Gun-shields
:
2 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
0 -- No torpedo armament
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1.97 / 0.00 / 0.00 / 0.00; 87 -- Belt armor; relative extent
0.79 / 1.97 -- Deck / CT
1.97 / 0.79 / 0.79 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


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