Gunboats

Talos · September 11, 2008, 12:43:23 PM

GB-class :

Egypt Gunboats laid down 1883

Six gunboats, in service in the River Force, at Aswan and Cairo, on the Nile.

GB-1
GB-2
GB-3
GB-4
GB-5
GB-6

Displacement:
178 t light; 188 t standard; 200 t normal; 209 t full load

Dimensions: Length overall / water x beam x draught
150.00 ft / 150.00 ft x 30.00 ft x 3.00 ft (normal load)
45.72 m / 45.72 m x 9.14 m x 0.91 m

Armament:
6 - 3.00" / 76.2 mm guns in single mounts, 12.08lbs / 5.48kg shells, 1883 Model
Quick firing guns in deck mounts
on side, evenly spread
16 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1893 Model
Machine guns in deck mounts
on side, all amidships
Weight of broadside 73 lbs / 33 kg
Shells per gun, main battery: 150

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 178 ihp / 133 Kw = 10.00 kts
Range 1,500nm at 6.00 kts
Bunker at max displacement = 21 tons (100% coal)

Complement:
26 - 34

Cost:
£0.019 million / $0.076 million

Distribution of weights at normal displacement:
Armament: 9 tons, 4.6 %
Machinery: 35 tons, 17.7 %
Hull, fittings & equipment: 123 tons, 61.7 %
Fuel, ammunition & stores: 22 tons, 11.0 %
Miscellaneous weights: 10 tons, 5.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
377 lbs / 171 Kg = 31.2 x 3.0 " / 76 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.72
Metacentric height 2.0 ft / 0.6 m
Roll period: 8.9 seconds
Steadiness - As gun platform (Average = 50 %): 45 %
- Recoil effect (Restricted arc if above 1.00): 0.04
Seaboat quality (Average = 1.00): 0.80

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.519
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 12.25 kts
Power going to wave formation at top speed: 32 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 5.00 ft / 1.52 m
- Forecastle (20 %): 5.00 ft / 1.52 m
- Mid (50 %): 5.00 ft / 1.52 m
- Quarterdeck (15 %): 5.00 ft / 1.52 m
- Stern: 5.00 ft / 1.52 m
- Average freeboard: 5.00 ft / 1.52 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 98.5 %
- Above water (accommodation/working, high = better): 111.7 %
Waterplane Area: 3,050 Square feet or 283 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.24
- Overall: 1.00

Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Talos · September 11, 2008, 12:43:58 PM

Na'am class :

Egypt Gunboat laid down 1895

Unique ship of his class, more powerful than the six GB-class. His big draft does not allow him to navigate everywhere.

GB-7 Na'am

Displacement:
822 t light; 869 t standard; 1,000 t normal; 1,105 t full load

Dimensions: Length overall / water x beam x draught
150.00 ft / 150.00 ft x 30.00 ft x 12.00 ft (normal load)
45.72 m / 45.72 m x 9.14 m x 3.66 m

Armament:
2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1895 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread
6 - 3.00" / 76.2 mm guns (4 mounts), 13.50lbs / 6.12kg shells, 1895 Model
Quick firing guns in deck mounts
on side, all amidships
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1895 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 298 lbs / 135 kg
Shells per gun, main battery: 150
4 - 18.0" / 457.2 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 97.50 ft / 29.72 m 6.57 ft / 2.00 m
Ends: 2.00" / 51 mm 52.48 ft / 16.00 m 6.57 ft / 2.00 m
Upper: 2.00" / 51 mm 97.50 ft / 29.72 m 8.00 ft / 2.44 m
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm - -
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 1,015 ihp / 757 Kw = 12.75 kts
Range 8,000nm at 7.00 kts
Bunker at max displacement = 235 tons (100% coal)

Complement:
88 - 115

Cost:
£0.084 million / $0.336 million

Distribution of weights at normal displacement:
Armament: 37 tons, 3.7 %
Armour: 347 tons, 34.7 %
- Belts: 183 tons, 18.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 2.4 %
- Armour Deck: 127 tons, 12.7 %
- Conning Tower: 13 tons, 1.3 %
Machinery: 172 tons, 17.2 %
Hull, fittings & equipment: 266 tons, 26.6 %
Fuel, ammunition & stores: 178 tons, 17.8 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,327 lbs / 602 Kg = 12.3 x 6.0 " / 152 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 1.1 ft / 0.3 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.648
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 12.25 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 17.00 ft / 5.18 m
- Forecastle (20 %): 11.00 ft / 3.35 m
- Mid (50 %): 11.00 ft / 3.35 m
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 11.48 ft / 3.50 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85.2 %
- Above water (accommodation/working, high = better): 45.1 %
Waterplane Area: 3,441 Square feet or 320 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 45 lbs/sq ft or 218 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 5.62
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

ciders · August 05, 2009, 02:25:59 PM

Al Sayyid class :

Egypt Large River Gunboat laid down 1912

The more powerful and the most recent gunboat of the Egyptian fleet.

GB-8 Al Sayyid

Displacement:
976 t light; 997 t standard; 1,044 t normal; 1,082 t full load

Dimensions: Length overall / water x beam x draught
229.66 ft / 229.66 ft x 39.37 ft x 6.56 ft (normal load)
70.00 m / 70.00 m x 12.00 m x 2.00 m

Armament:

2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1912 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread
6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
Quick firing guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 297 lbs / 135 kg
Shells per gun, main battery: 0

Armour:

- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 100.28 ft / 30.57 m 7.00 ft / 2.13 m
Ends: Unarmoured
Main Belt covers 67 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm - -
2nd: 1.00" / 25 mm - -

- Armour deck: 1.25" / 32 mm

Machinery:

Diesel Internal combustion motors,
Direct drive, 3 shafts, 2,250 shp / 1,679 Kw = 16.00 kts
Range 2,000nm at 10.00 kts
Bunker at max displacement = 85 tons

Complement:

91 - 119

Cost:

£0.078 million / $0.312 million

Distribution of weights at normal displacement:

Armament: 37 tons, 3.6 %
Armour: 352 tons, 33.7 %
- Belts: 173 tons, 16.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 23 tons, 2.2 %
- Armour Deck: 155 tons, 14.9 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 90 tons, 8.6 %
Hull, fittings & equipment: 478 tons, 45.7 %
Fuel, ammunition & stores: 68 tons, 6.5 %
Miscellaneous weights: 20 tons, 1.9 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):
3,184 lbs / 1,444 Kg = 29.5 x 6.0 " / 152 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.33
Metacentric height 2.1 ft / 0.6 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 69 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.38

Hull form characteristics:

Hull has a flush deck
Block coefficient: 0.616
Length to Beam Ratio: 5.83 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.67 ft / 5.08 m
- Forecastle (20 %): 10.61 ft / 3.23 m
- Mid (50 %): 10.61 ft / 3.23 m
- Quarterdeck (15 %): 10.61 ft / 3.23 m
- Stern: 10.61 ft / 3.23 m
- Average freeboard: 11.09 ft / 3.38 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 55.8 %
- Above water (accommodation/working, high = better): 149.1 %
Waterplane Area: 6,712 Square feet or 624 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 54 lbs/sq ft or 262 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.20
- Overall: 1.01

Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Gunboats

Talos

Talos

ciders