Hi SkipperBill Wrote: ------------------------------------------------------- > How far will a torpedo run out of the tube if the > motor is running? I'm not sure if I understand your question correctly, but the length of the torpedo run depends on the torpedo type. For example, the G7a torpedoes had adjustable range from 12500 m at 30 knots to 6000 m at 44 knots. -- Re
Forum: Technology and Operations

Hi Hans hans witteman Wrote: ------------------------------------------------------- > For the regulating tank seeing from the plan view > they should be behind a closed wall what do you > think? I think so. -- Regards Maciek
Forum: Modeling and schematics

Hi Eric Stone Wrote: ------------------------------------------------------- > I'm curious whether anyone here that has read > Plottke's book (Fächer Loos! U 172 Im Einsatz > (ISBN: 3790905100 / 3-7909-0510-0)) can tell me if > it describes the sinking of the SS Alaskan in any > detail There are few lines: "Bis zum 28.11. normaler Dienstbetrieb, um 0
Forum: General Discussions

Hi hans witteman Wrote: ------------------------------------------------------- > So far i know that for typIID the radio room and > planes station are located on starboard but for > backboard side i have no clue but surely the > navigation table should be there. I'm not the U-Boat veteran, but here I my thoughs about type IID Zentrale - maybe you will find it use
Forum: Modeling and schematics

Hi Maybe you'll find it useful: (xiii) Protection against Aircraft Attack while on Trials All U-Boats working up in the Baltic carry one yellow stripe about one metre wide painted diagonally across the deck four to five metres from the bows. Also a half metre wide yellow strips round the conning tower and a further diagonal stripe aft. This is so that they may be recognised eas
Forum: Modeling and schematics

Hi all Does anyone have the article "Diesel engines of the German Navy", published in the Journal of the American Society for Naval Engineers, Volume 60, Issue 1, pages 13–31, February 1948 ? I have found, that it can be ordered online here but they send paper copy only and it takes quite long. -- Thanks, regards Maciek
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Hi von Schoenvorts Wrote: ------------------------------------------------------- > Sorry I may be missing something. Aren't the > lower numbers upmost and the higher below? Right you are. I don't know, why I have written the opposite. -- Regards Maciek
Forum: Technology and Operations

Hi Franklin Wrote: ------------------------------------------------------- > And the DF loop antenna? On what occasions it was > used? The Direction Finding loop antenna was used as a receiver aerial for direction finder receiver (to obtain position of own boats other ships and aircraft). -- Regards Maciek
Forum: Modeling and schematics

Hello For last 1,5 year I have gathered some new informations, which allowed me to revise and update description of the torpedo tubes. Enjoy and please feel free in commenting, correcting and supplementing the text. -- Regards Maciek
Forum: Technology and Operations

Hi Don SnakeDoc Wrote: ------------------------------------------------------- >> Q1 - Photo 9 shows two holes in the torpedo tube. >> Are these holes the location where compressed air >> enters before and after the piston for submerged >> and surface firings? > > I marked these holes on the following image: > > I cannot find any good photo of th
Forum: Technology and Operations

Hi TopherVIIC Wrote: > So far I have been told they are strengthening > vanes. I know if I designed a boat that would be > subject to explosions and possible grounding, I > would want to protect the explosive warheads. That I think, that this framing was not against groudning and explosions. I believe it was related to the "piston-type" torpedo launching. Th
Forum: Modeling and schematics

That's right - Torpedo Data Computer used by US Navy consisted of two parts - Position Keeper and Angle Solver, while the Torpedo Vorhalt Rechner used on German Uboats was just Angle Solver. US Navy TDC has also useful feature called Sound Bearing Converter, which allowed passing the bearings from the sonar directly to the Position Keeper. The advantages of German TVRe were: smaller
Forum: Technology and Operations

Hi Take a look here - you'll find some answers for your questions: Chapter IX Damage Control, 4) Escape from a sunken boat. There is no sense to flood only the conning tower - to keep the control room secure from flooding, the hatch leading from the control room to the conning tower had to be closed - if so - how you will get out? The ways of flooding (and the time of flooding)
Forum: Technology and Operations

Hi threealls Wrote: ------------------------------------------------------- > hi, could anyone tell me that how long could Type > VII u-boat remain submerged without oxygen ? I > want to learn maximum duration they could > withstand. "U Bootskunde für U Boote Bauart VII C" (http://uboatarchive.net/Manual.htm, page 85) says: "The stored oxygen and sodium hyd
Forum: General Discussions

Hi Michael Fuller Wrote: > I recently found what I believe is a German > Torpedo Motor. It is solid brass and weighs > around 100 lbs., give or take. > > I cannot find ANY good schematics or photos of a > Torpedo Motor to compare, and was curious is > anyone has any good sources? If you are talking about G7a engine maybe these pictures help: These phot
Forum: Technology and Operations

Hi Gentlemen I have encountered interesting text relative to the topic: "Es muß in der letzten Septemberwoche gewesen sein, als die Tauchbunker leer gefahren waren und auf Tauchzelle umgestellt wurden. Nach dem Öffnen der Flutklappen hörten wir plötzlich ein sehr unangenehmes Geräusch von aufgrund zuschlagender Flutklappen. Es war vom Geräusch her ein Flutklappenpaar vom Tauchbunker 4,
Forum: Modeling and schematics

Hi OsmiumSteele Wrote: ------------------------------------------------------- > A couple questions: > > Did Uboats usually run with these open when > submerged? How did they open? Did they slide, > hinged at the top or bottom, etc.? When these tanks were used as fuel oil tanks, the flood valves were kept closed. When tanks were used as ballast tanks, they were
Forum: Modeling and schematics

Hi I also would love to see your video. -- Thanks, regards Maciek
Forum: General Discussions

Hello SImon D Wrote: ------------------------------------------------------- > I've read that the T1 air driven torpedo motors > could be set at variable speeds of 44KTs, 40KTs > and 30KTs. I also heard that U-Boats never used > the fastest speed, setting as there was a chance > that running at 44KTs could burn out the motor, > and thios fastest setting was restr
Forum: Technology and Operations

Hello I have been viewing "REPORT ON THE INTERROGATION OF SURVIVORS FROM U-172" (http://www.uboatarchive.net/U-172INT.htm) On page 102 there is following description: "It was stated that in April 1943 U-Müller participated with U-172 in an attack on a Gibraltar convoy. U-Müller was depth charged, and 6 torpedoes in the upper deck containers exploded. The explosions coul
Forum: General Discussions

Ken Dunn Wrote: ------------------------------------------------------- > Safety protocol required that the pistols were > never installed in any of the reserve torpedoes > regardless of where they were stored until just > before they were loaded into the torpedo tubes. Here - on the following photo of forward torpedo room of U-190, on the starboard side, just before the fram
Forum: Technology and Operations

Hi In the REPORT ON THE INTERROGATION OF SURVIVORS FROM U-177 (IXD2) on page 33 you can read: "50. RESERVE BARREL - One reserve barrel was carried in a container on Platform II under the starboard ladder. One more barrel was stowed in the Control Room." Also in REPORT ON THE INTERROGATION OF SURVIVORS FROM U-761 (VIIC) on page 3 stays: "Automatic 37-mm. on Platform II;
Forum: Modeling and schematics

elanaiba Wrote: ------------------------------------------------------- > >- 4 in forward torpedo room - on both side of > compartment, in place of crew >bunks > >- 2 under floor of forward torpedo room > > My impression - also based on schematics etc is > that 4 torpedoes would be kept under the floor > boards and only 2 above it - so that they could be &g
Forum: Technology and Operations

Hansel Wrote: ------------------------------------------------------- > Apparently a portion of the forward upper deck was > narrowed by sort of scalloping out the areas where > the torpedo containers had been. In "Vom Original Zum Modell - Uboottyp IXC" there are drawings of Schnelltauchback. They shows, that two most forward containers had to be removed to narrow the
Forum: General Discussions

Hansel Wrote: ------------------------------------------------------- > I see the Type-II listed here with only a pair of > reloads, however I recall "Aces of the Deep" (A > rather detailed & realistic U-Boat sim, for the > time) portraying the Type-IIs as having three > spares? Is two spares considered "Normal" with a > third being an occasional
Forum: Technology and Operations

The "Schnelltauchback" modification was applied to some U-Boats in the later years of the war, when the Allies dominated the air. The reloads from external containers to the boat's internal stowage was rather difficult because of presence of the enemy airplanes. Moreover, the external, upper deck torpedo containers were withdrawn from use because of frequent damages from depth ch
Forum: General Discussions

I don't what is the source of following informations, so be carefull The report says, that Pi 4 pistol has arming range 280 m. -- Regards Maciek
Forum: Technology and Operations

Hope it helps. -- Regards Maciek
Forum: General Discussions

Hello rovarch Wrote: ------------------------------------------------------- > I am new to this site. I am writing a paper about > U-boat wreck sites and the site formation > processes. I am trying to find out how thick the > pressure hull and outer skin metal was on Type > VIIC, Type VIIC/41 and a WWI Mittel U? For type VIIC hull thickness you can find in the followin
Forum: General Discussions

Hello Don Don Prince Wrote: ------------------------------------------------------- > I hope you don't mind, I printed it for a reference. Thank you Don, ofcourse not. > Q1 - Photo 9 shows two holes in the torpedo tube. > Are these holes the location where compressed air > enters before and after the piston for submerged > and surface firings? I marked thes
Forum: Technology and Operations