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Yesterday, 8:15pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted As a result Atlantean subs don't place a premium on submerged speed as much as offensive capabilities and range, though the latter is still a bit short by foreign standards. Since you mentioned range, I thought I would look at that and see how the Atlantean submarines compare to the other submarines. I only looked at those of 1940 and later otherwise it becomes a big unwieldy mess for me to work with. In order of displacement: Shay├║ ----------- China ------- 1942 ----- 182t ----- 1600nm@...

Yesterday, 5:32pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted What actual effect does the setting have in Subsim? Extra crew, heavier structure? Playing around with my Ninja submarine, changing it from coastal to ocean-going... - Crew goes from 54 to 59. This is because the baseline crew of 10 for coastal submarines becomes 15 for ocean-going submarines. - No idea what D_body and T_sheet are supposed to be but they change from 5.4 and 1.8 respectively to 5.6 and 2.7. - Weight for miscellaneous crew goes from ~10.45 tons per additional crew member t...

Thursday, April 27th 2017, 10:22pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted My own (very informal) rule-of-thumb was to keep coastal submarines under 1,000 t light or loaded displacement; but when I'm seeing coastal designs over 1,500 loaded displacement, I have to start wondering. Weight-wise, I would say that your 1000 ton max rule-of-thumb is way too high. Looking at the ranges of the above mentioned submarine classes, they really are ocean-going submarines and should be simmed as such. The Aluhaman with the shortest range of them has 58% more range than the ...

Thursday, April 27th 2017, 5:44pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted Still has a lot of unnecessary misc weight though, could probably trim about 26 tons off the misc weight, that would boost the reserve buoyancy a little. The Japanese look at it differently but if the Belgians want that... The thing that could be removed are the defense countermeasures and 'camouflage' but then they would probably not need the silent running engines either. I guess the Belgians can hold their breath for a long time so the air condition system, oxygen bottles and CO2 remo...

Tuesday, April 25th 2017, 6:20pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted Well ok, at least we know where the bleeding edge is. In Belgium's defence they have no submarine arm and therefore one Captain reading a bit of Jules Verne probably hasn't worked out too well. Sorry for being such a pain... uhm... I mean send that captain the the North Pole on a snowflake counting expedition!!! Perhaps something like this... IB-1 class, Belgian Submarine Date: 1948 Type: Coastal Length: 70.0m Beam: 6.5m Draft: 6.7m Crush depth: 225.0m Light Displacement 1275t Loaded Dis...

Tuesday, April 25th 2017, 2:08am

Author: Rooijen10

1940s IJN designs

The Shinobi I and Shinobi II classes are old and neglected. The Ninjas, threatening to go on strike, demand that the Navy takes action and give them some proper replacements. The Navy quickly designed the below one to make the Ninjas happy... or shut them up permanently when the subs catch fire. IN-1 class, Japan Submarine for crazy ninjas Date: 1948 Type: Coastal Length: 65.0m Beam: 6.0m Draft: 6.3m Crush depth: 225.0m Light Displacement 915t Loaded Displacement 1090t Full Displacement 1219t wt...

Tuesday, April 25th 2017, 1:47am

Author: Rooijen10

Belgian Submarine Design Competition

I worked off my Alternative-Safer-Option-Using-Electric-Engines-But-Not-As-Good submarine and entered the current given requirements and got this... Range requirements with diesel are 3360 nm @ 10 knots + 336 nm @ 20 knots and with electric they are 288 nm @ 6 knots + 53 nm @ 22 knots. Requirements II, Belgian Submarine Date: 1948 Type: Coastal Length: 170.0m Beam: 10.0m Draft: 10.5m Crush depth: 225.0m Light Displacement 8673t Loaded Displacement 8916t Full Displacement 8925t wt fuel&batts: 545...

Tuesday, April 25th 2017, 12:02am

Author: Rooijen10

Belgian Submarine Design Competition

Trying to make something work, a few more things with the tweaked requirements... Quoted I will state no maximum surfaced speed Actually you did state a minimum maximum surfaced speed... Quoted diesel fuel allowance for 14 days constant cruise at 10kts plus 5% time spent at 20kts That right there says "maximum speed using diesels is 20 knots minimum". Throwing the values into a modified version of my planned 1948 sub as test... 2.4 hours at 22 knots is 52.8 nm. Entering that in subsim means that...

Monday, April 24th 2017, 10:25pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted Both experimental submarines, though. I'd even classify the V-80 derivative Type XVIIs as an experimental submarine. True, but with the Type XVII (which I actually had not looked at) you are not that far off if you do not care about the well-being of the crew of the vessel. Quoted Most series-built diesel-electric submarines (mostly oceanic-sized subs) tend to have speeds of ~18 knots or lower, whether they're 1940s, 1950s, or even 1960s boats. For instance, the Oberon-class boats from t...

Monday, April 24th 2017, 6:28pm

Author: Rooijen10

Belgian Submarine Design Competition

Quoted I'll take a stab at it, but the 22-knot 'submerged burst / attack speed' requirement makes it ambitious for most 1950s submarines, let alone a 1940s submarine. You really don't get that kind of performance without incorporating nuclear power. Well, OTL there were the Japanese 1937 Submarine No.71 which was intended to go 25 knots (but only managed to get to just over 21 knots) and the German 1940 V-80 with its 28 knots thanks to its propulsion system so while ambitious, it does not look ...

Sunday, April 23rd 2017, 8:24pm

Author: Rooijen10

Belgian Submarine Design Competition

*looks at requirements* ... no wonder everyone makes jokes about the Belgians. You sure you do not want the additional requirement of masts with sails that can be raised should the submarine run out of fuel? "fuel allowance for 14 days constant cruise at 14kts" means a minimum range of 14 x 24 x 14 = 4704 nm at 14 knots. "plus 25% time spent at 25kts" means that a maximum speed of at least 25 knots is required as either surface of submerged speed and a minimum range of 14 x 0.25 x 24 x 25 = 2100...

Saturday, April 8th 2017, 6:02pm

Author: Rooijen10

Royal Navy Ships for 1948

Quoted The crew would be 31, not the hundred or so SS assumes necessary based on he hullspace! ... and 31 being based on what? Also, to be more correct it would be based on the below waterline hullspace as the crew value does not change when I change the hullspace by increasing or decreasing the freeboard. Whether the freeboard is 0 ft or 100 ft, I will still have the same crew value. it is obvious that the vessel is not a warship so obviously those values SS gives are way off, but it is not a ...

Friday, April 7th 2017, 5:44pm

Author: Rooijen10

French News, 1947

Hmmm... surprises me that the "anonymous source" was not found dead the next day, having 'accidentally' cut off his head while shaving... It is the Italian way after all.

Monday, April 3rd 2017, 4:54am

Author: Rooijen10

Royal Navy Ships for 1948

Yes, Britain should do the right thing and make a donation to the Philippines.

Saturday, March 25th 2017, 7:38pm

Author: Rooijen10

German Small Arms Trials

Quoted The pictures are somewhat tricksy, since they show weapons chambered in 7.92x33 Kurz. The 7.92x45 round would increase the width of the magazines and the visual length of the weapon... I was thinking the same thing... It makes it even more apparent as the IKK 04 magazine is visually wider than the magazines of the WWM 05 and the MWM 06. Also, the WWM 05 and MWM 06 are the same length so size-wise the way they are shown above should be how they actually are compared to each other if you h...

Monday, March 13th 2017, 9:30pm

Author: Rooijen10

Kriegsmarine Design Plans for 1948

Something I completely missed when looking at posted designs (and probably others missed it as well when you posted it a year ago). Minor edit needed here Bruce... looked at it after you posted it in the encyclopedia and I found it rather odd that with that low hp for electric, you would have a higher submerged speed than the surface speed with much more powerful diesels. Quoted Type XXIII Coastal Submarine ... ... Electric Motors: 800 hp Diesel Motors: 2,700 hp Speed: - Max Surfaced Speed: 10.9...

Monday, March 6th 2017, 3:17pm

Author: Rooijen10

Moving Forward

Okay, misunderstood that... but then, I already made my thoughts clear about moving on last year...

Monday, March 6th 2017, 12:28pm

Author: Rooijen10

Moving Forward

Chime in in what way? That Japan should be telling Peru that they are acquiring all kind of expensive garbage from other nations while in reality they should be buying high quality affordable Japanese garbage? ... and the one thing I did throw you way was shot down before it took off. I am kinda waiting for 1948 though keep my eye on the stuff you and Brock throw out for Peru and Chile but so far there isn't really anything of which I think I should jump on... and as I am waiting for something t...

Tuesday, February 28th 2017, 2:41pm

Author: Rooijen10

Selected Peruvian Events - 1946

South American materials and traditional Incan techniques? Dang! The vessel was build using Polynesian materials and traditional Polynesian techniques.

Tuesday, February 28th 2017, 3:18am

Author: Rooijen10

Selected Peruvian Events - 1946

It would probably be a lot faster if Mister Heyerdahl were to borrow the Susanoo from the Osaka Reenactment Group than to build his raft from scratch. Can easily be delivered in... *looks at Google Earth* ... probably 30-36 hours by stuffing it into a G10N1-L. Canned food, drinking water and first aid kits included. A very reliable craft even though the judges unjustly barred the craft from taking part in the 1940 Tall Ship race. (It was actually something I wanted to throw at the Nordmark playe...