General Discussions  
This is the place to discuss general issues related to the U-boat war or the war at sea in WWII. 

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6 years ago
ROBERT M.
C.E. Garrison: Did you read my entries? ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello SnakeDoc: I have a copy of Heinz Shaeffer's book "U-BOAT 977" Later, ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
zakarpatska, et al: Are you aware that the U.S. Navy had a hydrogen peroxide (70%) powered torpedo? The Mark 16 (sub version)and the Mark 17 (destroyer version) which used anodized lead screens discs inside a decomposition flask, in which High pressure air and potable water were introduced to create wet steam which was routed through a turbine nozzle to two counter-rotating, vertically-mount
Forum: Technology and Operations
6 years ago
ROBERT M.
Hello John: It's available at amazon.com for $14.80; used paperback -451 pages. ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello jcrt, et al: Have you read "The Surcouf Conspiracy" by Julius Grigore. Jr., Captain, USN, Retired yet? Also Captain Frederick H. Hallett, USN,n Retired, has some recent info on this subject. Later, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Joe: How could U-234 surrender in Newport News , VA in February of 1945 when Admiral Doenitz did not send the surrender message until the first week of May, 1945? ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello Capt. Fred: Go to czwren@gmail.com This is the e-mil address that appears in the flyleaf of the new 2011 publication :The Surcouf Conspiracy" by Julius Grigore, Jr., Captain, USN Retired. Have a great day, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello Phil, er al: In the U.S. the engineers at the torpedo research facility in Newport, RI were building the Mark 16 (for submarines) torpedo and the Mark 17 (for destroyers) torpedo using NAVOL (70% hydrogen peroxide). The converted Fleet Submarine, the USS PIPER (SS-409) carried the Mark 16 torpedo for many years. Post War, the Navy awarded a contract to Fairchild Aircraft Company to b
Forum: Technology and Operations
6 years ago
ROBERT M.
Hello Don: I'm afraid I can't help you in this regard. ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
Hello Don: For one thing the specific gravity of fresh water is different, making the boat ride deeper when on the surface......... Later, ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
derek, et al: There's a wonderful book titled (Original Title) "The Final Journey" by James E. Wise (cc2005) available at amazon.com for $97.50 (new) and $55.07 (used). The title that amazon.com advertises is "U-505: The Lone Wolf of Chicago Museum of Science and Industry." It's a 9-3/4" X 11-1/2" hardcover, loaded with black & white and color p
Forum: General Discussions
6 years ago
ROBERT M.
Hello Derek: Ken Dunn obtained an invitation to the commissioning ceremony of the new U-505 exhibit at the museum of Science and Industry in Chicago, Illinois on June 4, 2005. I met him there and we spent the whole day looking at and taking photos of the boat. If anyone is interesting in viewing 26 black & white photos of her journey from Portsmouth Navy Yard to Chicago, go to: These
Forum: General Discussions
6 years ago
ROBERT M.
jcrt: Have you read "CODE NAME CAESAR: The Secret Hunt for U-boat 864 During World War II" authored by Jerome Preisler and Kenneth Sewell - (ccJuly 2012)? I'm not advertising the book for profit, just letting the forum posters know that it has been published recently. I have not read it yet,it's in line with others I must read. Sincerely, ROBERT.M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello Commander: Please elaborate..... ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello Ken: You wrote: ".......because one of the cables that were connected to the torpedo while it was in the tube didn't retract when the launch was initiated......." What cables are these? ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
Hello Bezukhov: I don't know about German torpedoes being launched without compressed air, but the U.S.Navy launched Mark 27 passive acoustic torpedoes without using compressed air in the last months of WWII in the Pacific. All Mark 27s were "swim-out" weapons. Later, ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
Sully: Fate and sheer luck......... ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Sully: On 9 November,1944,the U.S.submarine USS FLOUNDER (SS-251) sunk the German U-boat U-537 in the Java Sea, east of Surabaya, all 58 crewmen lost. Check it out at: Have a nice day, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Tommy Wood: Did you read my two posts dated 10/4/2012? Later, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello J.T: Did you read my latest post about locating a source for "Silent Service" DVDs? Check it out; John Clear's company is also doing patrol reports of U.S. subs. Later, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Tommy Wood, et al: You're in luck.... Today I finally made contact with John Clear EMC(SS)USN (Ret) whose company has reproduced and enhanced the original "Silent Service" movies. Just go to: www.usssealion.com and all the info and much more is there. Later, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello skipperbill: For info regarding your question go to: www.hnsa.org/doc/torpedomk18/index.htm (This is OP943 for the Mark 18 Electric torpedo.) www.hnsa.org/doc/torpedomk18-maintindex.htm (This is NAVORD8093 for charging instructions for the MK 18 Electric Torpedo.) I don't have any info on German electric torpedoes. Enjoy, ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
SnakeDoc, et al: Thank you, nice chat. I was was torpedoman for 24 years in the U.S. Navy, nukes included... Later, ROBERT M.
Forum: Technology and Operations
6 years ago
ROBERT M.
SnakeDoc, et al: The torpedo piston has guides that travel in machined grooves on the inside wall of the torpedo tube. Toward the breech end, these grooves taper until they disappear near the muzzle end of the tube, limiting the travel of the piston; this allows the impulse air to remain inside the boat. By opening the tube vent, the impulse air is now bled off, allowing the piston to retu
Forum: Technology and Operations
6 years ago
ROBERT M.
SnakeDoc, et al: When the boat launches torpedoes, the breech doors are wide open, allowing seawater to flood the tubes. The flooded seawater weighs more than the launched torpedo, correct? So how does the u-boat broach? IMO, the boat was very light, out of trim well before the torpedo launches. And the CO could have slowed his advance during launches. U.S. boats have a WRT (water roun
Forum: Technology and Operations
6 years ago
ROBERT M.
Hello Volker: I still can't open it - everything is in German and I don't know any German. If you want to visit and extremely long blog about SCORPION and THRESHER, go to: www.historynet.com/the-uss-scorpion-buried-at-sea.htm You'll find R.B. Rule there......... You have a very enjoyable day, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Back again Volker: For the real story about LOSS OF SCORPION, go to amazon.com and select "books", then type in "Scorpion Down" by Ed Offley. Now click (65 customer reviews), now scroll down to "A technical rebuttal" by R.B.Rule. I hope you haven't been "sucked in" by Ed Offley, Kenneth Sewell and Jerome Preisler. on the Loss of SCORPION. La
Forum: General Discussions
6 years ago
ROBERT M.
Hello Volker: Have you read "MUTINY: The Inside Story of The Hunt for Red October - From the Soviet Naval Hero Who Was There" by Davis Hagberg and Boris Gindin - (cc2008)? It appears that you have been reading fiction novels by Preisler Offley and Sewell. Incidentally, I'm unable to download your documentary. Have a nice day, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello all: Just received my copy yesterday. Written by the authors of "Scorpion Down" Jerome Preisler and Kenneth Sewell. It's available from amazon.com. Later, ROBERT M.
Forum: General Discussions
6 years ago
ROBERT M.
Hello Bob Culver: Have you done any research on what type exploder mechanism you carried in your MK15 torpedoes yet? You never answered my question; were you a torpedoman serving aboard USS SAMUEL N. MOORE? Awaiting your reply, ROBERT M.
Forum: Warship forum
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