Spanish Navy

[Sachmle]

I don't like the idea of having the aft turrets so close to the beam. Puts the magazine awfully close to the hull. Makes it hard to use the coal bunkers as extra 'armor' and puts a lot of stress on you belt/barbette armor.

[TexanCowboy]

Ugh; I have that program...

I absolutely despise trying to do amateur architecture work with it; e.g.; designing blueprints for a toolshed.

[Logi]

Re: Sachmle

Yes, I can get it further away from the edge of the beam (it's 1~2 ft off right now) but it gets a bit too center-line for my taste. I can also minimize the aft superstructure (the back "tower" is considerably more aft than it needs to be). Mostly this is because the model was 360' and I had to move the vertices to fit a 270' ship.

Perhaps I will fix tomorrow when I have time to do the necessary corrections to the hull.

Re: Texan

Actually, it's quite easy. It was made for quick architectural work after all. I tend to do all my work for non-organics in it (with the exception of double-axis curves) and then export to 3DsMax if I need to do any organics or heavy curves (like a ship hull). If you think Sketchup is a bad tool for architecture work, you should try the other programs. They take far longer to learn and are far slower at it to boot.

[Carthaginian]

Well...

She has same very glaring design quirks that I don't particularly like.
We'll see how it holds up to the forthcoming tech rules.

The twin 8" mounts will be virtually useless- too heavy and slow to traverse by hand.
Is there any ship at this time that HAD such mounts?

This seems like a semi-dread 20 ears before it's time. It's nothing like the multi-turret monitors other people are designing... more like some someone trying to out build them with technology not shown on any ship of the period.

[TexanCowboy]

It took me four hours to design a simple tool shed. Maybe there was a setting for installing a defunct 2 by 4 by 8; that would have helped. As it was; I had to add each one individually. With over 100 seperate pieces of wood (2 by 6s, 2 by 4s, 4 by 4s), it wasn't great...

[Desertfox]

You actually successfully used SketchUp? Took me 3 days to draw a simple box that took me 30 minutes in SolidWorks, and I don't even like Solidworks.

[snip]

*looks at copy of AutoCAD 2012* well...

[Logi]

It takes me less than a half a minute to draw a simple box in Sketchup... Of course, it also takes me less than two minutes to draw a simple model in 3DsMax. As for AutoCAD, I haven't used it enough yet. But the general consensus is the Sketchup is in generally much faster for prototyping, ie: Not for high-quality rendering.

As for Carth...

Well the 8" mounts are actually my imitation of the 8"/30 Mark 1-2 for the USN Cruisers. The difference is that mine has a gun shield and that it's a twin. For the twin, all I did was literally take two 8" singles and merge the pedestals together for a "twin" mount.

As for the era, I assume in 1877, because there definitely were such mounts a few years later. Most ships that carried a large secondary (ie: French Devastation class) had even larger secondaries. Whereas this one uses 8"/25 secondaries, the French Devastation class used 10.6"/18 secondaries. Ofc, the Devastation class also used a larger main battery - 13.4" - as opposed to 12" so the scaling make sense of it.

As for the impossibly of traversing the 8"/25s, I wouldn't say it's impossible. It's just hard, but I find it hard to believe that with a crew of 10~20 crew per mount and a revolving pedestal that it would be impossible to traverse the gun. Remember that we're not asking them to lift the gun or even move it quickly, just traverse it at less than 1 degrees a second.

---

According to the Human Factor Design Standards, the average mean force produced by pushing at 100% shoulder height by a able male is 645 N.

Given that the pedestal has a radius of 3 ft, the amount of torque one man would produce sustained would be 589.788 Nm.

By my calculations, the moment of Inertia is ~186941.72 kg*m^2. So the amount of torque you need to produce to produce an acceleration of 1 degree per second would be ~3262.75 Nm. That means to turn the mount manually 1 degrees per second, you would need 6 men (really 5.5). By contrast, you would need 25 men to turn the twin 12"/20s manually 1 degrees per second.

So, is it hard and inefficient? Yes. Is it impossible? No. It's not like I'm asking for them to manually turn a 12"/20 twin at over 1 degrees per second.

--

Technology not shown on any ship of the period... You would be surprised. If I lengthened the ship from 270' and thus gain a lot more deck space for 4.7" casemates, it would look striking similar to period ships. The only difference being the addition of one more twin 12"/20. The thing is that for the ship to have all manners of small guns, it must have tons of deck space. For example, figuring from the modeling, each 4.7"/30 casemate needs 15' of superstructure to have a useful arc of fire (the ones on my model have 11' and have 60-70 degrees firing arcs). Even if I deleted one 12"/20 twin, that only gives me an additional space for barely two more 4.7"/30 casemates. That's a jump from 8 x 4.7"/30 to 12 x 4.7"/30 for 2 x 12"/20. Ofc, I can gain additional "space" by placing the casemates below deck on the side. But SS gives warning that they can't be fired in any sort of sea. That makes them worthless and a waste of weight. I also don't believe with my calculations that they can fire in anything but a calm sea.

So either the ship loses 1/3 of it's large gun firepower for a mere 2 more 4.7"/30 per broadside or I simply lengthen the ship (which also drives tonnage up like crazy since lengthening the ship weakens it fatally).

As for semi-dreadnought and multi-turret monitors... That is just ridiculous. The ship holds a good mixed battery. 6 x 12"/20s, 8 x 8"/25s, 8 x 4.7"/30s. Perhaps that is heavy, but that's only compared to the British predreadnoughts. They held a large number of 2.5" and 2" guns (guessing from shell weight since internet is down). However, compared to ships like the French Devastation class, I actually have a lighter battery ( reportedly 4 x 13.4"/18, 4 x 10.6"/18, 5 x 5.5", and more small guns on the Devastation class ). If I had more space, I wouldn't place more 8"/25s either, there's simply no space up front and I needed them up front to "balance" the topweight of the ship.

You are correct that some nations did build nothing but multi-turret monitors, but I would hardly call a ship going 14 kts with only 9' of freeboard all that much different. By my calculations, the bow wave height at 14 kts is roughly 3.16 ft tall. Added with the 5 ft tall average waves of the Iberian Coast and you get a total wave crest height of 8.16' ft. Not a lot of wiggle room for 9' freeboard. In other words, despite what SS says, it can't go out very far in sea.

[Logi]

Oh, as per the spending separation, I thought I would test a 1860-ish design.

Lots of broadside guns - 18 x 5-pdrs, 11 x 172-pdrs, 12 x 35-pdrs per side. It costs $5.1, but with discount it becomes $2.55.

With steam, it will do 12.5 kts. As a brigantine, with sail it will do 8 kts.

IAB Vizcaya, Iberia Ship of Line laid down 1862
Armoured Frigate (Broadside ironclad)

Displacement:
   4,150 t light; 4,718 t standard; 5,100 t normal; 5,406 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (262.73 ft / 256.00 ft) x 49.40 ft x (22.00 / 23.11 ft)
   (80.08 m / 78.03 m) x 15.06 m  x (6.71 / 7.04 m)

Armament:
      36 - 2.50" / 63.5 mm 20.0 cal guns - 5.00lbs / 2.27kg shells, 600 per gun
     Muzzle loading guns in broadside mounts, 1862 Model
     36 x Single mounts on sides, evenly spread
      36 hull mounts on upper deck- Limited use in all but light seas
      22 - 8.00" / 203 mm 13.0 cal guns - 172.00lbs / 78.02kg shells, 60 per gun
     Muzzle loading guns in broadside mounts, 1862 Model
     22 x Single mounts on sides, evenly spread
      24 - 4.70" / 119 mm 18.0 cal guns - 35.00lbs / 15.88kg shells, 600 per gun
     Breech loading guns in broadside mounts, 1862 Model
     24 x Single mounts on sides, evenly spread
      24 raised mounts
      Weight of broadside 4,804 lbs / 2,179 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   256.00 ft / 78.03 m   8.00 ft / 2.44 m
   Upper:   5.00" / 127 mm   256.00 ft / 78.03 m   8.00 ft / 2.44 m
     Main Belt covers 154 % of normal length

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,708 ihp / 2,020 Kw = 12.50 kts
   Range 2,000nm at 8.00 kts
   Bunker at max displacement = 688 tons (100% coal)

Complement:
   301 - 392

Cost:
   £0.331 million / $1.324 million

Distribution of weights at normal displacement:
   Armament: 199 tons, 3.9 %
      - Guns: 199 tons, 3.9 %
   Armour: 758 tons, 14.9 %
      - Belts: 758 tons, 14.9 %
   Machinery: 814 tons, 16.0 %
   Hull, fittings & equipment: 2,124 tons, 41.7 %
   Fuel, ammunition & stores: 950 tons, 18.6 %
   Miscellaneous weights: 255 tons, 5.0 %
      - Hull below water: 204 tons
      - Above deck: 51 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,050 lbs / 1,383 Kg = 673.1 x 2.5 " / 64 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.38
   Metacentric height 3.1 ft / 0.9 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.87
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a round stern
   Block coefficient (normal/deep): 0.642 / 0.647
   Length to Beam Ratio: 5.18 : 1
   'Natural speed' for length: 16.00 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 2.00 ft / 0.61 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
      - Forward deck:   30.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
      - Aft deck:   30.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
      - Quarter deck:   20.00 %,  13.00 ft / 3.96 m,  13.00 ft / 3.96 m
      - Average freeboard:      13.00 ft / 3.96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78.5 %
      - Above water (accommodation/working, high = better): 79.1 %
   Waterplane Area: 9,613 Square feet or 893 Square metres
   Displacement factor (Displacement / loading): 153 %
   Structure weight / hull surface area: 162 lbs/sq ft or 792 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 2.96
      - Overall: 1.10
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Nobody]

Interesting ship, your Gloria Logi.
However, I think it would be a more plausible design if the artillery would be mirrored. That is the two turrets forward and the single centerline turret aft. Why? Well, for one thing they are too close to the edge, not to mention the internal components a turret needs. I think the engines would be in the way as well.

[Jefgte]

Hmmmm

I think that your Gloria concept is not possible.

You could'nt instal 2 turrets aft alternatively because, you have engines with 2 shafts & the shells/powder rooms... at the same place...


Jef

[Logi]

Re: Nobody

You are correct, mostly the reason I did not think of that is that two wing turret forward looks infinitely more ugly than two wing turrets aft. It would make engine space a non-issue. Also as I said before, I can easily move the aft turrets closer to centerline, there is space for that.

Re: Jefgte

You are probably correct. But for argument's sake, I'm going to try to make a case against.

First, if we assume that the French Devastation class battleships of ~1877 engines are the ones "used" in the Gloria class then the power needed to be generated is roughly 56% of that of the Devastation class (Devastation generated 8000 hp, SS says Gloria needs only ~4500). That means instead of 12 boilers, you might only need 6-7 and instead of 2 engines, it might only need 1. That's just saying how the speed and size reduces the size of the machinery space as well (in fact SS says it only needs 79.85 ft of the hull to store it's machinery space - omitting the guns etc).

That is why SS gives it the rating

"Excellent machinery, storage, compartmentation space"

If we use the Ericsson turret on the USS Monitor as a benchmark for the approximate space needed by a twin 12" mount, we can say that the mount would take 7-8' under the deck (it taking ~6' apparently on the Monitor).

Now if we assume that other than that, we must also store the shells directly under the spindle (taking the most space downwards and obstructing engines) we'll have to calculate that. If we assume that the shells are ~62 inches long (estimate by my program, which increases shell length by roughly a foot or foot and half for the pre-dread period, making this a generously high estimate), then each shell takes up 3968 cubic inches (assuming a box and 2" of handling space per shell).

Let's further make that for each row of these shells, there needs to be 2 foot of walking room, so it's easy to pick the shells up.

In just the outer most layer I can store roughly 79 such shells! I still have space for 258 such shells (without handling space in this case). But to be generous, let's assume it takes up one whole deck underneath the gun, that means a total space below deck of ~14' (7' spindle + 7' deck underneath). So that means out of the hull height (freeboard + draught), I still have 21' of space. If we assume due to the hull compartments etc. that we only have 2/3 of this space to work in, that's still two deck heights.

I think the engine can fit in this room, let alone a propeller shaft. Keep in mind that the engine space is sufficiently stored under the superstructure and does not need to be underneath the turrets.

I think the main reason why the engine space can actually fit is twofold:

1) The ship is a lot lighter than other contemporary ships, therefore requiring a lot less HP for the same speed. For example: The Devastation class is roughly 31% larger at full load. If we assume a linear increase in HP required for the same speed (not true), then it would require roughly 5,900 hp to move at 14 kts - that's 9 boilers and 2 engines rather than 6-7 boilers and 1 engine.

2) The ship is using Ericsson/Coles mounts. Unlike later era turrets, there isn't a very large shell-handling room and heavy machinery. The turret doesn't extend nearly as far down into the hull.

[Logi]

Slightly larger version for the addition of a taller bow and in general deck. Also a wider ship. This makes fitting the 12"/20 twins further away from the edges even less of a problem.

The armament is mirrored. I can get a general idea of the look when I turn the model around. Before it looked distinctly impressive, now it just looks ugly. :(

IAB Gloria, Iberia Battleship laid down 1877

Displacement:
   6,284 t light; 6,769 t standard; 7,400 t normal; 7,905 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (270.00 ft / 270.00 ft) x 60.00 ft x (26.50 / 27.99 ft)
   (82.30 m / 82.30 m) x 18.29 m  x (8.08 / 8.53 m)

Armament:
      6 - 12.00" / 305 mm 20.0 cal guns - 694.94lbs / 315.22kg shells, 60 per gun
     Breech loading guns in Coles/Ericsson turret mounts, 1877 Model
     2 x Twin mounts on sides, forward deck centre
     1 x Twin mount on centreline, aft deck centre
      8 - 8.00" / 203 mm 25.0 cal guns - 208.62lbs / 94.63kg shells, 90 per gun
     Breech loading guns in deck mounts, 1877 Model
     4 x Twin mounts on sides, aft evenly spread
      8 - 4.70" / 119 mm 30.0 cal guns - 42.92lbs / 19.47kg shells, 600 per gun
     Breech loading guns in casemate mounts, 1877 Model
     8 x Single mounts on sides, forward evenly spread
      Weight of broadside 6,182 lbs / 2,804 kg
      Main Torpedoes
      4 - 15.0" / 381 mm, 13.12 ft / 4.00 m torpedoes - 0.128 t each, 0.512 t total
   submerged side tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 254 mm   270.00 ft / 82.30 m   8.00 ft / 2.44 m
   Upper:   6.00" / 152 mm   270.00 ft / 82.30 m   5.00 ft / 1.52 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   6.00" / 152 mm            -
   2nd:   6.00" / 152 mm   4.00" / 102 mm            -
   3rd:   4.00" / 102 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.00" / 25 mm
   Forecastle: 1.00" / 25 mm  Quarter deck: 1.00" / 25 mm

   - Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 4,559 ihp / 3,401 Kw = 14.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 1,136 tons (100% coal)

Complement:
   398 - 518

Cost:
   £0.585 million / $2.340 million

Distribution of weights at normal displacement:
   Armament: 479 tons, 6.5 %
      - Guns: 478 tons, 6.5 %
      - Weapons: 1 tons, 0.0 %
   Armour: 2,013 tons, 27.2 %
      - Belts: 1,099 tons, 14.9 %
      - Armament: 643 tons, 8.7 %
      - Armour Deck: 222 tons, 3.0 %
      - Conning Tower: 49 tons, 0.7 %
   Machinery: 984 tons, 13.3 %
   Hull, fittings & equipment: 2,807 tons, 37.9 %
   Fuel, ammunition & stores: 1,116 tons, 15.1 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,640 lbs / 3,012 Kg = 9.5 x 12.0 " / 305 mm shells or 16.9 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 3.9 ft / 1.2 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.63
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.603 / 0.610
   Length to Beam Ratio: 4.50 : 1
   'Natural speed' for length: 16.43 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): -22.00 degrees
   Stern overhang: -3.00 ft / -0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   13.00 %,  12.00 ft / 3.66 m,  9.50 ft / 2.90 m
      - Forward deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Aft deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Quarter deck:   11.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Average freeboard:      9.63 ft / 2.94 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.8 %
      - Above water (accommodation/working, high = better): 54.0 %
   Waterplane Area: 11,885 Square feet or 1,104 Square metres
   Displacement factor (Displacement / loading): 120 %
   Structure weight / hull surface area: 173 lbs/sq ft or 845 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 4.25
      - Overall: 1.10
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Jefgte]

This Gloria is an exellent 2nd class BB

- Forecastle:   13.00 %,  12.00 ft / 3.66 m,  9.50 ft / 2.90 m
      - Forward deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m

you could do
- Forecastle:   13.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
- Forward deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m


Jef  ;)

[Logi]

Did so, also making modeling the ship easier (flush surfaces of the same height are a lot easier than raised flushes (that is on e of the two axis curve I was taking about).

Raised upper belt 0.5 ft to fix the mistake, completely covering upper hull.

IAB Gloria, Iberia Battleship laid down 1877

Displacement:
   6,330 t light; 6,816 t standard; 7,450 t normal; 7,957 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (270.00 ft / 270.00 ft) x 60.00 ft x (26.50 / 27.99 ft)
   (82.30 m / 82.30 m) x 18.29 m  x (8.08 / 8.53 m)

Armament:
      6 - 12.00" / 305 mm 20.0 cal guns - 694.94lbs / 315.22kg shells, 60 per gun
     Breech loading guns in Coles/Ericsson turret mounts, 1877 Model
     2 x Twin mounts on sides, forward deck centre
     1 x Twin mount on centreline, aft deck centre
      8 - 8.00" / 203 mm 25.0 cal guns - 208.62lbs / 94.63kg shells, 90 per gun
     Breech loading guns in deck mounts, 1877 Model
     4 x Twin mounts on sides, aft evenly spread
      8 - 4.70" / 119 mm 30.0 cal guns - 42.92lbs / 19.47kg shells, 600 per gun
     Breech loading guns in casemate mounts, 1877 Model
     8 x Single mounts on sides, forward evenly spread
      Weight of broadside 6,182 lbs / 2,804 kg
      Main Torpedoes
      4 - 15.0" / 381 mm, 13.12 ft / 4.00 m torpedoes - 0.128 t each, 0.512 t total
   submerged side tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 254 mm   270.00 ft / 82.30 m   8.00 ft / 2.44 m
   Upper:   6.00" / 152 mm   270.00 ft / 82.30 m   5.50 ft / 1.68 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   6.00" / 152 mm            -
   2nd:   6.00" / 152 mm   4.00" / 102 mm            -
   3rd:   4.00" / 102 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 1.00" / 25 mm
   Forecastle: 1.00" / 25 mm  Quarter deck: 1.00" / 25 mm

   - Conning towers: Forward 6.00" / 152 mm, Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 4,584 ihp / 3,419 Kw = 14.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 1,142 tons (100% coal)

Complement:
   400 - 521

Cost:
   £0.587 million / $2.350 million

Distribution of weights at normal displacement:
   Armament: 479 tons, 6.4 %
      - Guns: 478 tons, 6.4 %
      - Weapons: 1 tons, 0.0 %
   Armour: 2,044 tons, 27.4 %
      - Belts: 1,129 tons, 15.2 %
      - Armament: 643 tons, 8.6 %
      - Armour Deck: 223 tons, 3.0 %
      - Conning Tower: 49 tons, 0.7 %
   Machinery: 989 tons, 13.3 %
   Hull, fittings & equipment: 2,817 tons, 37.8 %
   Fuel, ammunition & stores: 1,120 tons, 15.0 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,709 lbs / 3,043 Kg = 9.6 x 12.0 " / 305 mm shells or 17.0 torpedoes
   Stability (Unstable if below 1.00): 1.35
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.62
   Seaboat quality  (Average = 1.00): 1.37

Hull form characteristics:
   Hull has raised forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.607 / 0.614
   Length to Beam Ratio: 4.50 : 1
   'Natural speed' for length: 16.43 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 51
   Bow angle (Positive = bow angles forward): -22.00 degrees
   Stern overhang: -3.00 ft / -0.91 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   13.00 %,  12.00 ft / 3.66 m,  12.00 ft / 3.66 m
      - Forward deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Aft deck:   38.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Quarter deck:   11.00 %,  9.50 ft / 2.90 m,  9.50 ft / 2.90 m
      - Average freeboard:      9.83 ft / 2.99 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.5 %
      - Above water (accommodation/working, high = better): 54.0 %
   Waterplane Area: 11,930 Square feet or 1,108 Square metres
   Displacement factor (Displacement / loading): 120 %
   Structure weight / hull surface area: 173 lbs/sq ft or 843 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 4.29
      - Overall: 1.10
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily