[REQ] What about the Tupe XVII?

Hitman · 12-19-09, 12:41 PM

So, the XVIII featured in the game was in fact not just never operational, but not even finished. But the XVII, equipped with a Walter turbine was finished and used by the KM for trials

, even got numerals as U-792 to U-795. Any modder would be interested in trying to make its 3D model for the game? We already have a working Walter turbine with corresponding interface, so it could be a nice semi-realistic addition

http://www.uboat.net/types/xviia.htm

Sledgehammer427 · 12-19-09, 02:43 PM

If there's a fairly accurate set of blues for it, I'd love to take a whack. I thought that type looked really cool.

EDIT: Matter of fact, just a side picture will work, looking at some of the pics there are of the type in dry dock, that's a relatively easy hull shape to work with.

Hitman · 12-19-09, 05:26 PM

I have something much better than a simple picture

Sledgehammer427 · 12-20-09, 12:13 AM

Whoo! Very nice!

I'll install mm3d on this pc and get it started here in a couple days!

Hitman · 12-20-09, 04:47 AM

Some more useful information and a nice render:

The Type XVII boats had both conventional diesel engines and a single Walter closed-cycle engine. They were designed for coastal operations. Few in numbers but rich in variants, the Type XVII U-boat was not a success, trying to press the Walter turbine into service before its time. Planned to run to a dozen boats (U- 1081/1092), the ‘G’variant was halted before any were complete. It was designed for an ultimate submerged speed of 25 kts.
There was little development of the basic submarine in the inter-war period, except that the once-popular saddle-tank design, in which the buoyancy chambers were located outside the pressure hull, gave way more and more to the double hull, in which they enclosed it almost completely and were themselves contained within a light enclosure which could be shaped to improve sea-keeping and performance. In Germany, developments in the late 1930s were aimed only at increasing the size and endurance of existing types, not making any radical changes to their design. However, by 1941, experimental boats with a new type of powerplant which did not need atmospheric oxygen had been produced, and were proving to be quite remarkable. The powerplant in question was, once again, the creation of the prolific Professor Hellmuth Walter, whom we have already met.
The key to the concept was the Walter closed-cycle propulsion system that relied on the near-explosive decomposition of concentrated hydrogen peroxide in the presence of a catalyst, The reaction produced a high-temperature mix of steam and free oxygen into which fuel oil was injected and fired, resulting in high-pressure gases that were made to drive .a conventional turbine. A weakness of the principle was that almost any impurity could act as a catalyst to initiate the process at a disastrously early stage.
Walter had constructed a small experimental boat, the V30, launched on 19 January 1940, which displaced just 73.8 tonnes (75 tons) submerged. He equipped it with a steam turbine, fed by a variant of the liquid-fuel motors which were to power the VI flying bomb’s launch catapult, producing their steam by the chemical reaction of hydrogen peroxide with a catalyst. Walter soon discovered that his submarine could make almost 30 knots submerged – around three times the submerged speed of any conventional submarine running on battery power – and that led him to suggest to the Kriegsmarine the construction of a fleet of similarly powered submarine warships. When asked where he proposed to store the large quantities of reagent and fuel that would be required, he produced a design for a two-decker submarine, in itself virtually two existing double hulls joined into a tigure ‘8′, the bottom portion of which would serve exclusively as ‘bunkerage’. Someone at this proposal meeting noted that it would be just as easy to fill that lower section with batteries.
More ‘Walter’ boats were built or at least were in the course of construction when the war ended. The two Type XVIIB boats which were successfully salvaged after having been scuttled in Hamburg harbour were later transferred to the US Navy and the Royal Navy, who operated them experimentally, but the powerplant required massive quantities of fairly exotic fuel and was most temperamental. It would perhaps become a valid solution in the fullness of time, but that was something the Kriegsmarine did not have, and it was essential to look at other suggestions.
#
Two prototype boats proved the machinery feasible, and the system was pressed into service in the Type XVIIs. A drawback was the extreme thirst of the system, dictating a small boat with a single propeller. For cruise purposes, this was driven by a conventional diesel/electric combination, with the Walter coupled up only to force or decline an engagement.
Externally, the hull was cleaned-up, with no guns and a minimum of proturberances. It was of figure-eight section, formed of two overlapping circular pressure hulls of unequal diameter. In practice, the length to beam ratio was too high, resulting in an unnecessarily high drag. This meant that the Type XVIIA never realized its theoretical top speed of 25 kts possible with two turbines on a common shaft. So only four such boats were built, the modified Type XVIIB (three completed) having only one turbine. Space was available for only two torpedo tubes, with but one reload for each, a deficiency offset by the increasing lethality of the weapon. A projected Type XVIIK would have abandoned the volatile Walter for conventional diesels aspirated with pure oxygen stored aboard.
TYPE XVIIB
Type: Coastal submarine
Displacement: 317 tonnes (312 tons) surfaced; 363 tonnes (357 tons) submerged
Length: 41.50m (136.17ft)
Submerged speed: 21.5 knots
Submerged range: 210km (130 miles)
Armament: 2 x 533mm (21 in) torpedo tubes
Crew: 19

Hitman · 12-27-09, 05:29 PM

Forget those plans I posted before, they are from the WK-202 Type XVII

Apparently there were several different versions grouped as Type XVII, but the best looking and most advanced one was the XVIIB, which included also a sonar dome on the bow.

You can find the plans and in depth article here: http://www.u-historia.com/

Go to "Técnica---->U-Boote---->Tipo XVII" and scroll down until you see the plans for the Type XVIIB

What a beautiful looking boat

12-19-09, 12:41 PM	#1
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,100 Downloads: 109 Uploads: 2	[REQ] What about the Tupe XVII? So, the XVIII featured in the game was in fact not just never operational, but not even finished. But the XVII, equipped with a Walter turbine was finished and used by the KM for trials , even got numerals as U-792 to U-795. Any modder would be interested in trying to make its 3D model for the game? We already have a working Walter turbine with corresponding interface, so it could be a nice semi-realistic addition http://www.uboat.net/types/xviia.htm __________________ One day I will return to sea ...

12-19-09, 02:43 PM	#2
Sledgehammer427 PacWagon Join Date: Jun 2007 Location: Drinking coffee and staring at trees in Massachusetts Posts: 2,901 Downloads: 280 Uploads: 0	If there's a fairly accurate set of blues for it, I'd love to take a whack. I thought that type looked really cool. EDIT: Matter of fact, just a side picture will work, looking at some of the pics there are of the type in dry dock, that's a relatively easy hull shape to work with. __________________ Cold Waters Voice Crew - Fire Control Officer Cmdr O. Myers - C/O USS Nautilus (SS-168) 114,000 tons sunk - 4 Spec Ops completed V-boat Nutcase - Need supplies? Japanese garrison on a small island in the way? Just give us a call! D4C!

12-19-09, 05:26 PM	#3
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,100 Downloads: 109 Uploads: 2	I have something much better than a simple picture __________________ One day I will return to sea ...

12-20-09, 12:13 AM	#4
Sledgehammer427 PacWagon Join Date: Jun 2007 Location: Drinking coffee and staring at trees in Massachusetts Posts: 2,901 Downloads: 280 Uploads: 0	Whoo! Very nice! I'll install mm3d on this pc and get it started here in a couple days! __________________ Cold Waters Voice Crew - Fire Control Officer Cmdr O. Myers - C/O USS Nautilus (SS-168) 114,000 tons sunk - 4 Spec Ops completed V-boat Nutcase - Need supplies? Japanese garrison on a small island in the way? Just give us a call! D4C!

12-20-09, 04:47 AM	#5
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,100 Downloads: 109 Uploads: 2	Some more useful information and a nice render: The Type XVII boats had both conventional diesel engines and a single Walter closed-cycle engine. They were designed for coastal operations. Few in numbers but rich in variants, the Type XVII U-boat was not a success, trying to press the Walter turbine into service before its time. Planned to run to a dozen boats (U- 1081/1092), the ‘G’variant was halted before any were complete. It was designed for an ultimate submerged speed of 25 kts. There was little development of the basic submarine in the inter-war period, except that the once-popular saddle-tank design, in which the buoyancy chambers were located outside the pressure hull, gave way more and more to the double hull, in which they enclosed it almost completely and were themselves contained within a light enclosure which could be shaped to improve sea-keeping and performance. In Germany, developments in the late 1930s were aimed only at increasing the size and endurance of existing types, not making any radical changes to their design. However, by 1941, experimental boats with a new type of powerplant which did not need atmospheric oxygen had been produced, and were proving to be quite remarkable. The powerplant in question was, once again, the creation of the prolific Professor Hellmuth Walter, whom we have already met. The key to the concept was the Walter closed-cycle propulsion system that relied on the near-explosive decomposition of concentrated hydrogen peroxide in the presence of a catalyst, The reaction produced a high-temperature mix of steam and free oxygen into which fuel oil was injected and fired, resulting in high-pressure gases that were made to drive .a conventional turbine. A weakness of the principle was that almost any impurity could act as a catalyst to initiate the process at a disastrously early stage. Walter had constructed a small experimental boat, the V30, launched on 19 January 1940, which displaced just 73.8 tonnes (75 tons) submerged. He equipped it with a steam turbine, fed by a variant of the liquid-fuel motors which were to power the VI flying bomb’s launch catapult, producing their steam by the chemical reaction of hydrogen peroxide with a catalyst. Walter soon discovered that his submarine could make almost 30 knots submerged – around three times the submerged speed of any conventional submarine running on battery power – and that led him to suggest to the Kriegsmarine the construction of a fleet of similarly powered submarine warships. When asked where he proposed to store the large quantities of reagent and fuel that would be required, he produced a design for a two-decker submarine, in itself virtually two existing double hulls joined into a tigure ‘8′, the bottom portion of which would serve exclusively as ‘bunkerage’. Someone at this proposal meeting noted that it would be just as easy to fill that lower section with batteries. More ‘Walter’ boats were built or at least were in the course of construction when the war ended. The two Type XVIIB boats which were successfully salvaged after having been scuttled in Hamburg harbour were later transferred to the US Navy and the Royal Navy, who operated them experimentally, but the powerplant required massive quantities of fairly exotic fuel and was most temperamental. It would perhaps become a valid solution in the fullness of time, but that was something the Kriegsmarine did not have, and it was essential to look at other suggestions. # Two prototype boats proved the machinery feasible, and the system was pressed into service in the Type XVIIs. A drawback was the extreme thirst of the system, dictating a small boat with a single propeller. For cruise purposes, this was driven by a conventional diesel/electric combination, with the Walter coupled up only to force or decline an engagement. Externally, the hull was cleaned-up, with no guns and a minimum of proturberances. It was of figure-eight section, formed of two overlapping circular pressure hulls of unequal diameter. In practice, the length to beam ratio was too high, resulting in an unnecessarily high drag. This meant that the Type XVIIA never realized its theoretical top speed of 25 kts possible with two turbines on a common shaft. So only four such boats were built, the modified Type XVIIB (three completed) having only one turbine. Space was available for only two torpedo tubes, with but one reload for each, a deficiency offset by the increasing lethality of the weapon. A projected Type XVIIK would have abandoned the volatile Walter for conventional diesels aspirated with pure oxygen stored aboard. *TYPE XVIIB* Type: Coastal submarine Displacement: 317 tonnes (312 tons) surfaced; 363 tonnes (357 tons) submerged Length: 41.50m (136.17ft) Submerged speed: 21.5 knots Submerged range: 210km (130 miles) Armament: 2 x 533mm (21 in) torpedo tubes Crew: 19 __________________ One day I will return to sea ...

12-27-09, 05:29 PM	#6
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,100 Downloads: 109 Uploads: 2	Forget those plans I posted before, they are from the WK-202 Type XVII Apparently there were several different versions grouped as Type XVII, but the best looking and most advanced one was the XVIIB, which included also a sonar dome on the bow. You can find the plans and in depth article here: http://www.u-historia.com/ Go to "Técnica---->U-Boote---->Tipo XVII" and scroll down until you see the plans for the Type XVIIB What a beautiful looking boat __________________ One day I will return to sea ...