Shipbucket

Your ship displaces one million, three-hundred and eighty-one thousand, four hundred and ninety-three tons at standard displacement?

That's a LOT different from what I see in the picture!

I think its 1381.493 tons

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I play with SpringSharp quite a bit, and I have never seen it express any number down to three decimals. In fact, I know for a fact that the program cannot do that, as I just attempted to make it do so. For ship displacement, it ALWAYS rounds to the nearest ton.

I have no idea where that error came from.
I fiddled a bit with the displacement and got it back down to ~1800 tons and now all the numbers are working out as they should.
Nighthunter, I throw my hat in the ring. You were obviously right, the design does indeed work.

Btw, will you be doing a wartime modification?
1.1" replaced with 40mm Bofors, DC-mortars installed etc?

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Very nice! I like this one a lot. It's a very interesting concept, one that perhaps the American's may have built for use in the Philippines for instance, or for use as a USCG cutter in peacetime. Would have made an excellent wartime escort too.

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Nighthunter,

I love the ship- she's form and function combined into a beautiful package. They would have made a cheap and competent (and probably more useful) vessel than many of the designs which actually got built- such as the Erie.

I have noticed a few small issues with your Springsharp sim, however...
The way the drawing is done, shouldn't the freeboard decrease at the 'mid-break' rather than at the beginning of the quarterdeck. It looks like the after part of the ship is superstructure built on the main deck. As that seems to be a problem, the after 5" mount would need to be raised as well.

You ship seems to have more than enough stability to handle the additional topweight, though... so I don't see it as killing the design.

Again, I LOVE the design... I can't wait to see your opponent's entry.

Carth, it doesn't seem to be a problem, but I also moved the freeboard back. Please correct me if I am wrong on the terms.

Hood, I am allowing people to take the design and run with it, if they want to wartime update the design, please do. And if anyone wants to Anglicize the design, again please do!

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Nighthunter,

The way Springsharp measures deck height would place the aft 5"/L38 mount in a 'raised' position in all versions of your drawing.
The 'freeboard' height in Springsharp would only come to the level of the aft deck at the location of the aft gun mount. I've worked on this drawing a bit to give some indications as to how I have come to understand Springsharp after using it for about 5 years on and off on our naval sim forums.

I've altered your drawing a bit to show what I mean... I feel bad about doodling on such a pretty ship, though.


The yellow highlighted line should be the 'freeboard height' that Springsharp is taking into account- the actual height of the ship's weight-bearing hull. Anything above this line would be considered 'superstructure', and any gun mount above it would be considered 'raised' or 'superfiring.' NOTE: in the older Springsharp 2, all 'raised' guns were considered to be one deck above the freeboard level, Springsharp 3 allows for them to be raised up to two decks high.
The 'landmarks' that Springsharp 3 uses are highlighted by red arrows- the fo'c'sle is everything forward of the first gun mount... by default, the fore mount is always placed directly at the end of the fo'c'sle unless the 'fore deck aft' gun position is used. The midbreak is where any break in deck height is resolved; if I am doing an 'artistic curve' I try to center the curve at this location. The fore deck and aft deck comprise everything aft of the fo'c'sle and forward of the quarter deck. The quarter deck itself is the portion of the deck aft of the rear-most gun mount- again, because Springsharp automatically places the stern guns as far aft as possible unless specifically directed otherwise.

Gun mount #1 is on the fore deck, at deck level, and is neither 'raised' nor 'superfiring.'
Gun mount #2 is on the fore deck, one deck above deck level, and is both 'raised' and 'superfiring.'
Gun mount #3 is on the aft deck, one deck above deck level, and is 'raised' but not 'superfiring.'
Location #4, if it were to contain a gun mount- say a quad 1.1" AA mount- would be on the aft deck, two decks above deck level, and both 'raised' and 'superfiring.'

That's about the best I can do as far as explaining how Springsharp considers things. I play with a lot of ship designs in Springsharp- both historic and unique... I won't call myself an expert by any means, but I am pretty experienced.

And I might just take you up on the challenge to create another nation's version of such a ship...

Carth, thank you for such a detailed explanation of SpringSharp3. It helps someone that is newish to nautical terms. We need to Sticky an Explanation for People who start to use SpringSharp3 to build their ships.

I encourage you to do your own version, it is fun. XD

I adjusted a few things and due to the change in freeboard and Displacement and here is what I came up with:

Port Angeles, USA Patrol Gunboat laid down 1936

Displacement:
867 t light; 907 t standard; 1,235 t normal; 1,497 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(300.00 ft / 296.00 ft) x 30.00 ft x (14.00 / 15.69 ft)
(91.44 m / 90.22 m) x 9.14 m x (4.27 / 4.78 m)

Armament:
3 - 5.00" / 127 mm 38.0 cal guns - 59.33lbs / 26.91kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1936 Model
3 x Single mounts on centreline ends, majority forward
1 raised mount - superfiring
16 - 1.10" / 27.9 mm 45.0 cal guns - 0.67lbs / 0.30kg shells, 150 per gun
Anti-air guns in deck mounts, 1936 Model
4 x Quad mounts on sides, evenly spread
4 - 0.50" / 12.7 mm 45.0 cal guns - 0.07lbs / 0.03kg shells, 150 per gun
Machine guns in deck mounts, 1936 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 189 lbs / 86 kg
Main DC/AS Mortars
2 - 300.00 lbs / 136.08 kg Depth Charges + 48 reloads - 6.696 t total
in Stern depth charge racks

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.50" / 38 mm 1.00" / 25 mm -
2nd: 1.00" / 25 mm - -

- Armoured deck - single deck:
For and Aft decks: 0.25" / 6 mm
Forecastle: 0.25" / 6 mm Quarter deck: 0.25" / 6 mm

- Conning towers: Forward 1.00" / 25 mm, Aft 0.75" / 19 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 4,517 shp / 3,370 Kw = 20.00 kts
Range 15,000nm at 12.00 kts
Bunker at max displacement = 590 tons

Complement:
103 - 135

Cost:
£0.334 million / $1.337 million

Distribution of weights at normal displacement:
Armament: 55 tons, 4.4 %
- Guns: 46 tons, 3.8 %
- Weapons: 8 tons, 0.7 %
Armour: 55 tons, 4.4 %
- Armament: 25 tons, 2.0 %
- Armour Deck: 25 tons, 2.0 %
- Conning Towers: 4 tons, 0.4 %
Machinery: 127 tons, 10.3 %
Hull, fittings & equipment: 621 tons, 50.2 %
Fuel, ammunition & stores: 368 tons, 29.8 %
Miscellaneous weights: 10 tons, 0.8 %
- Above deck: 10 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,997 lbs / 1,813 Kg = 64.0 x 5.0 " / 127 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.9 ft / 0.3 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0.86
Seaboat quality (Average = 1.00): 2.00

Hull form characteristics:
Hull has low quarterdeck ,
a normal bow and small transom stern
Block coefficient (normal/deep): 0.348 / 0.376
Length to Beam Ratio: 9.87 : 1
'Natural speed' for length: 18.71 kts
Power going to wave formation at top speed: 41 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 7.00 degrees
Stern overhang: 1.48 ft / 0.45 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 20.50 ft / 6.25 m, 17.50 ft / 5.33 m
- Forward deck: 30.00 %, 17.50 ft / 5.33 m, 15.00 ft / 4.57 m
- Aft deck: 28.00 %, 15.00 ft / 4.57 m, 15.00 ft / 4.57 m
- Quarter deck: 22.00 %, 7.50 ft / 2.29 m, 9.50 ft / 2.90 m
- Average freeboard: 14.69 ft / 4.48 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 46.3 %
- Above water (accommodation/working, high = better): 156.8 %
Waterplane Area: 5,420 Square feet or 504 Square metres
Displacement factor (Displacement / loading): 266 %
Structure weight / hull surface area: 51 lbs/sq ft or 251 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.82
- Longitudinal: 6.21
- 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

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

I think you're a bit light on ammunition for the machineguns. Currently you're only carrying 150 per barrel.

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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

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Source Materiel is always welcome.