[PSUBS-MAILIST] Pisces V and I-400

[hank pronk]

Hi Vance,  Thanks'
I am working on the main seal and shaft tube assembly.  My seal is right ahead of the motor as it was originally built.  I agree, your idea is better than trapping anti freeze in the tube.  I have already rebuilt the tail section.  All the parts for that came with Gamma in all those boxes.  
Hank



On Thursday, December 5, 2013 6:43:49 AM, "vbra676539 at aol.com" <vbra676539 at aol.com> wrote:
  
Hank, 
I don't know about anti freeze on bushings and seals. The ultimate solution for this is to build a seal package like Perry. Basically an inner seal, a bearing, and an outer seal running in sea water. The tube is then filled with oil with an eighth inch line fed through to a pressure gauge inside the boat. If the outer seal fails, the extra pressure while submerged will show in the gauge and alert you. If the inner seal fails, then you get drippy oil. Same deal. In this case, you would replace the bushing with a bearing (to keep metallic particles out of the oil) and then mount your outboard seal on the back plate. It's a pain to set up from scratch, I imagine, but you can build the whole thing on the bench, which should make it do-able. 
Vance



-----Original Message-----
From: hank pronk <hanker_20032000 at yahoo.ca>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Tue, Dec 3, 2013 1:50 pm
Subject: Re: [PSUBS-MAILIST] Pisces V and I-400


Vance, Any one 
Gamma has a bushing on the end of the propeller shaft.  This bushing runs wet in the water.  The bushing is a very snug fit  ( the sub came that way).  My concern is two fold, I need to make sure the shaft tube is full of water before spinning the seal.  The tube will always be half full of water and there could be a air pocket created causing problems for the seal.  Also the water left in the tube can freeze up here in the winter.  I don't want to put drain lines to the shaft tube because I like that if the seal fails it will take a long time for any amount of water to get past the bushing.  My idea is to fill the tube with water and and anti freeze  and install a seal outside the bushing.  The tube will always be full and if it is a bit shy, the water will push past the light seal.   
What do you think 
Hank 



On Tuesday, December 3, 2013 11:11:16 AM, "vbra676539 at aol.com" <vbra676539 at aol.com> wrote:
  
Maybe I should have gone to work for Terry Kerby when I had the chance?  
Vance



-----Original Message-----
From: jimtoddpsub <jimtoddpsub at aol.com>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Tue, Dec 3, 2013 1:02 pm
Subject: [PSUBS-MAILIST] Pisces V and I-400


 
Pisces V discovered the resting place of the Japanese submarine I-400 just three miles off Barbers Point, Hawaii in August, however the discovery was kept secret until it was cleared with the US State Department for announcement yesterday.  The I-400 was one of just a few Japanese aircraft carrier submarines which carried three light bomber aircraft each.  They were surrendered at sea at the war's end, but later scuttled to avoid having to grant access to the Russians per treaty.  They were twin-hulled and over 400 feet long. 
-Jim 
http://www.huffingtonpost.com/2013/12/02/japanese-submarine-world-war-ii_n_4375090.html 
http://en.wikipedia.org/wiki/Pisces_V 
http://en.wikipedia.org/wiki/I-400-class_submarine   
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