Shipbucket

For pulling oneself off a sandbar- yes; because there is nothing funnier for onlookers (and more embarrassing for a crew) than watching a river boat captain trying to get his vessel off a bar.

Indeed, and since the rivers it's going to be navigating are likely to be mostly unsurveyed it's going to happen a lot.

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“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error

Worklist

Source Materiel is always welcome.

There are some excellent concepts here, I think Alex's Uruguayan rivergunboat is very neat and looks the part. Thiel's Danish ship just looks so real that I wish it had been built!

_________________
Hood's Worklist
English Electric Canberra FD
Interwar RN Capital Ships
Super-Darings
Never-Were British Aircraft

Thanks for the Compliments, Hood, I would really like you to throw one together, if you have the time, that is. Call it the Cook class or something.

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"It is better to type nothing and be assumed an ass, than to type something and remove all doubt." - Me

When this whole thing started out, I wanted to make a British ship that was able to perform a very large number of duties. Such a vessel would need to have a cruiser's range, a destroyer's firepower, an escort's ASW abilities, and over-the-horizon spotting capabilities. All of these roles would have to be fulfilled without infringing upon Great Britain's cruiser tonnage- so the ship would have to fall under the gunboat classification- and the ship would have to have low manpower requirements and be relatively inexpensive.

I started out on the design, couldn't ever make it look like I wanted, so I pushed it to the back burner and began working on the smaller Excelsior... but I never forgot what I wanted the ship to really look like. Now that I've rounded out my N-verse nation and started on it's budget, I've pulled this 'super gunboat' out of the 'never gonna be' pile and started to finish her.

The Island class 'colonial cruiser' mounts four dual-purpose 4.72" guns suitable for use against surface targets or aircraft; 500 rounds per gun are carried to allow for extended engagements. Four octuple 2-pounder AA mounts are mounted (two on either beam) to provide with heavy short-range anti-aircraft fire; 5000 rounds per gun are carried, along with spare barrels for each gun. A trio of 3" twelve-pounder guns are also carried for use against small craft, submarines, and for providing illumination; 500 rounds per gun are carried- 200 of which are are star shells. The vessel also carries a Fairey Seafox floatplane for use in reconnaissance, giving the ship over-the-horizon scouting capabilities. A sonar set with a pair of depth charge rails and two depth charge throwers provide good anti-submarine capability. In addition to all this, the ship requires only 1/3 the manpower of a light cruiser (180 - 230 men) and carries an additional detachment of 25 Marines.



Island Class, Great Britian Colonial Cruiser laid down 1936

Displacement:
1,706 t light; 2,000 t standard; 2,500 t normal; 2,900 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(415.00 ft / 400.00 ft) x 40.00 ft x (12.00 / 13.36 ft)
(126.49 m / 121.92 m) x 12.19 m x (3.66 / 4.07 m)

Armament:
4 - 4.72" / 120 mm 45.0 cal guns - 50.00lbs / 22.68kg shells, 500 per gun
Dual purpose guns in deck and hoist mounts, 1930 Model
2 x Single mounts on centreline, forward deck forward
1 raised mount - superfiring
2 x Single mounts on centreline, aft deck aft
1 raised mount aft - superfiring
3 - 3.00" / 76.2 mm 45.0 cal guns - 11.99lbs / 5.44kg shells, 500 per gun
Quick firing guns in deck mounts, 1936 Model
2 x Single mounts on sides, forward deck
2 double raised mounts
1 x Single mount on centreline, aft deck
1 double raised mount
32 - 1.57" / 40.0 mm 39.0 cal guns - 2.01lbs / 0.91kg shells, 5,000 per gun
Breech loading guns in deck mounts, 1936 Model
4 x 2 row octuple mounts on sides, evenly spread
4 raised mounts
Weight of broadside 300 lbs / 136 kg
Main DC/AS Mortars
2 - 240.00 lbs / 108.86 kg Depth Charges + 50 reloads - 5.571 t total
in Stern depth charge racks
2nd DC/AS Mortars
2 - 240.00 lbs / 108.86 kg Depth Charges + 50 reloads - 5.571 t total
in Depth charge throwers

Armour:
- Box over machinery & magazines:
2.00" / 51 mm

- Conning towers: Forward 3.00" / 76 mm, Aft 0.00" / 0 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 6,600 shp / 4,924 Kw = 20.03 kts
Range 11,225nm at 14.00 kts
Bunker at max displacement = 900 tons

Complement:
176 - 229

Cost:
£0.586 million / $2.345 million

Distribution of weights at normal displacement:
Armament: 96 tons, 3.8 %
- Guns: 80 tons, 3.2 %
- Weapons: 15 tons, 0.6 %
Armour: 218 tons, 8.7 %
- Armour Deck: 206 tons, 8.2 %
- Conning Tower: 12 tons, 0.5 %
Machinery: 185 tons, 7.4 %
Hull, fittings & equipment: 1,107 tons, 44.3 %
Fuel, ammunition & stores: 794 tons, 31.8 %
Miscellaneous weights: 100 tons, 4.0 %
- Hull below water: 40 tons
- Hull above water: 40 tons
- On freeboard deck: 20 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,581 lbs / 3,892 Kg = 163.2 x 4.7 " / 120 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 1.8 ft / 0.6 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.456 / 0.475
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 20.00 kts
Power going to wave formation at top speed: 39 %
Trim (Max stability = 0, Max steadiness = 100): 35
Bow angle (Positive = bow angles forward): 22.63 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 24.00 ft / 7.32 m, 18.00 ft / 5.49 m
- Forward deck: 30.00 %, 18.00 ft / 5.49 m, 17.00 ft / 5.18 m
- Aft deck: 32.50 %, 17.00 ft / 5.18 m, 16.00 ft / 4.88 m
- Quarter deck: 17.50 %, 16.00 ft / 4.88 m, 16.00 ft / 4.88 m
- Average freeboard: 17.49 ft / 5.33 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 47.8 %
- Above water (accommodation/working, high = better): 188.5 %
Waterplane Area: 10,257 Square feet or 953 Square metres
Displacement factor (Displacement / loading): 268 %
Structure weight / hull surface area: 59 lbs/sq ft or 287 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 2.97
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather



Any thoughts- improvements that need to be made, etc; I haven't put the antenna on yet, but they are coming.
I'm also thinking about doing a wartime refit, and perhaps even a 'life-extension' refit bringing them into the realms of 'modern' weapons.

The underwater hull is missing.

Well Nighthawk it so happens that I have designed a similar ship for my RN at Wesworld. The drawing was done years ago and isn't really up to modern SB standards but it gives the overall view of the class.


700 Ton Colonial Torpedo Boat, Great Britain Torpedo Boat laid down 1937

Displacement:
676 t light; 702 t standard; 753 t normal; 793 t full load

Dimensions: Length overall / water x beam x draught
280.63 ft / 275.00 ft x 29.00 ft x 7.70 ft (normal load)
85.54 m / 83.82 m x 8.84 m x 2.35 m

Armament:
4 - 4.00" / 102 mm guns (2x2 guns), 31.00lbs / 14.06kg shells, 1931 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread, 1 raised mount
4 - 1.57" / 40.0 mm guns (1x4 guns), 2.00lbs / 0.91kg shells, 1922 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
4 - 0.66" / 16.8 mm guns (2x2 guns), 0.14lbs / 0.06kg shells, 1936 Model
Machine guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 133 lbs / 60 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.50" / 13 mm 0.50" / 13 mm -
2nd: 0.50" / 13 mm - -
3rd: 0.50" / 13 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,006 shp / 11,940 Kw = 30.46 kts
Range 2,000nm at 15.00 kts
Bunker at max displacement = 91 tons

Complement:
71 - 93

Cost:
£0.460 million / $1.842 million

Distribution of weights at normal displacement:
Armament: 17 tons, 2.3 %
Armour: 6 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 332 tons, 44.1 %
Hull, fittings & equipment: 291 tons, 38.7 %
Fuel, ammunition & stores: 77 tons, 10.2 %
Miscellaneous weights: 30 tons, 4.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
352 lbs / 160 Kg = 11.0 x 4.0 " / 102 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 1.2 ft / 0.4 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.23
Seaboat quality (Average = 1.00): 1.13

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.429
Length to Beam Ratio: 9.48 : 1
'Natural speed' for length: 19.18 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 45
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (40 %): 19.00 ft / 5.79 m (11.00 ft / 3.35 m aft of break)
- Quarterdeck (15 %): 11.00 ft / 3.35 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 14.36 ft / 4.38 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 164.1 %
- Above water (accommodation/working, high = better): 122.8 %
Waterplane Area: 5,196 Square feet or 483 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.60
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

Class Names:
HMS Egret, Pelican, Ibis, Cygnet, Crane, Hind, Kite, Lapwing, Lark, Black Swan, Bittern, Stork, Hart, Peacock, Pheasant, Wren

_________________
Hood's Worklist
English Electric Canberra FD
Interwar RN Capital Ships
Super-Darings
Never-Were British Aircraft

Really? God, I hadn't noticed. Carthaginian, this downgrades your drawing from being really quite interesting to terrible, because you haven't added the part that has little impact on the capabilities of the ship since you have a SS break down which shows what it can do...

Uhm- it's not 'missing'; it is, quite frankly, 'under water' and therefore invisible.
If you read the Springsharp, you find out that she is a twin screw, diesel-electric vessel.

I am actually not intuitive enough to know exactly how to make the ship's underwater hull simply by imagining how the visible parts look. I know that the best here at Shipbucket do underwater hulls as standard- but I am hardly one of the best, and am not really even what you'd call 'up and coming.' I'm an old hand with Springsharp, so I'm very good at making ships work in it, but I'm not the best at getting my concepts from 'abstract' to 'illustrated'- though with the help of Shipbucket I am getting better.

I'll likely not be doing underwater hulls on my drawings for some time to come- so the fact that they are not included isn't something that needs comment.

A very good effort Carthaginian, but some points as critique, which I hope you don't mind.
First your ship doesn't look British at all, apart from the armament that is.
Second I believe that you are slightly over reaching with four octuple Pom-Poms, these guns are huge and heavy (even cruisers did not mount four octuple mountings, four quad yes), and the addition of the 12 pounders? it only serves to complicate the fire control issue, which brings us to the other problem and that is thee are no Pom-Pom directors.
Also please note that the only DP 4.7" gun in RN service was the mounting on board the batleships HMS Nelson and HMS Rodney the carriers HMS Gloriousand HMS Courageous, and the mine layer Adventure, and that mounting was considered too heavy for small ships (destroyers or escorts), the Adventure was nearly 7,000 tons standars BTW.
Also the aircraft you have put is the Fairey IIIF and not the Seafox .

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Thank you Kim for the crest

"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"