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Old school quals

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Hugh View Drop Down
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    Posted: 15 Mar 2018 at 4:02pm
Does anyone remember putting sailplanes into the "under the ice" position? I never did it but had to know how for quals. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sewer Pipe Snipe Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2018 at 4:08pm
Long time ago, and I only knew for quals as I was an aft ender. Something similar to taking independent control and overriding range switches I believe. But like I said 1971 was a long time ago, and it was only in passing. Hopefully there is an Aux Fwd here, because they are the ones that did it.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gerry Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2018 at 4:22pm
On the 641, legend had it that we could not do "under ice" position. The story was the boat had long ago surfaced under someone else's ship, and busted up the sail plane mechanisms. As a result, they told me, our sail plane axle shaft was a foot aft and  and two feet lower than original design, and could not actually go vertical without the trailing edge hitting the superstructure. Probably BS, but there was nothing in quals about Under Ice (except Sonar).
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FTGC(SS) Lane View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FTGC(SS) Lane Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2018 at 8:17pm
I oversaw the planes being placed in "under ice" and returned to normal operation many times. 35 vertical surfaces and 40 stationary dives on two 637 class boats. The last one was during March and April 1984.
A ring at the top of the operating piston had to be removed, the planes shifted to "emergency" then placed at full rise and then the "under ice" valve operated to "under ice". To go back to normal was move the valve to "normal" and then the planes could be returned to zero and shifted back to normal, the ring did not have to replaced but usually was, for safety.
Removal and replacement of the ring was a quick operation lasting less than a minute each way. Of course it seemed like forever the first time as the boat was going deeper and DOWs always wanted speed to maintain depth.Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom McNulty Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2018 at 11:10am
When I qualified on the 599 we had to know how to place the planes for ice surface. In addition there was knowledge on placing the masts in the ice position. I believe when the masts were dropped, maybe an extra 6" the had to be manually lifted back to the normal position.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SaltiDawg Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2018 at 4:52pm
Originally posted by FTGC(SS) Lane FTGC(SS) Lane wrote:

I oversaw the planes being placed in "under ice" and returned to normal operation many times. 35 vertical surfaces and 40 stationary dives on two 637 class boats. ....


I had similar experience on three SSN-637 class boats.

I'm kinda surprised to hear about of folks on other class boats talking about an Under-Ice Position on their Sail Planes???

The SSN-637 Class boats had an Ice Hardened HY-80 sail top  and structure and and under-ice position for a couple of masts, IIRC.  ECM? Radar? BRA-21?

I was unaware of any earlier classes having that capability.  Early on we went thru very thick ice - indeed the non-emergency limit on deballasting was imposed after some of our early trips.  There was a concern that if you removed too much ballast while pushing against the underside of the ice that the boat would become unstable.

The 688's had no such capability because they had no Arctic Mission.

Off to Google under ice position of sailplanes on other classes.


Edited by SaltiDawg - 16 Mar 2018 at 5:28pm
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Tom McNulty View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom McNulty Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2018 at 5:03pm
I hope I didn't confuse the discussion by using the 599. Remember it was originally built as a Fast Attack.
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