Forum rules and expectations

Hello, and welcome to the forums at the Nautilus Drydocks, formerly!

We welcome anyone with a passion for submarines and a desire to learn and share knowledge about this fascinating hobby. Use of these forums indicates your intention to abide by our code of conduct:

1. No spam. All automated messages, advertisements, and links to competitor websites will be deleted immediately.

2. Please post in relevant sub-forums only. Messages posted in the wrong topic area will be removed and placed in the correct sub-forum by moderators.

3. Respect other users. No flaming or abusing fellow forum members. Users who continue to post inflammatory, abusive comments will be deleted from the forum after or without a warning.

4. No threats or harassment of other users will be tolerated. Any instance of threatening or harassing behavior is grounds for deletion from the forums.

5. No profanity or pornography is allowed. Posts containing adult material will be deleted.

6. No re-posting of copyrighted materials or other illegal content is allowed. Any posts containing illegal content or copyrighted materials will be deleted.
See more
See less

Snort system testing

  • Filter
  • Time
  • Show
Clear All
new posts

  • Snort system testing

    Click image for larger version  Name:	BA944808-CD2C-4402-B4FB-F59D374FD1F5.jpeg Views:	0 Size:	84.4 KB ID:	140609Click image for larger version  Name:	BA944808-CD2C-4402-B4FB-F59D374FD1F5.jpeg Views:	0 Size:	84.4 KB ID:	140608Hi all, I have surface trimmed my Blueback which I have opted to set up using the Snort option. How do I test the submerged trim without actually using forward motion? I have tried opening the intake valve while surfaced and submerged by holding it underwater. I have not been able to have the sub stay at all submerged, the valve is working correctly, it is not blocked either. Maybe I have trimmed her with too much flotation so the addition of ballast water thru the intake has no effect? If I add weight she sits well below the waterline, and becomes unstable. Removing foam does the same
    Last edited by biggsgolf; 06-13-2020, 12:54 PM.

  • #2


    • #3
      David, thanks, talking about the ballast valve that lets air out to allow water in to submerge the sub


      • #4
        David, thanks for the photos. I have the submerged trim completed. Just to be clear, I now reposition the buoyant foam that I installed above the waterline for submerged trim gradually downward, toward being on or below the waterline until I obtain the desired surface trim? I do not add additional foam below the waterline instead?


        • #5
          Will do David, thanks!


          • #6
            David, she is almost good! My issue is now when she descends the nose drops, then the tail dips down then rises to just below level. I know she will be moving forward so maybe I am crazy, but would like her to descend evenly. Any ideas? Maybe a wee bit of foam near tail above the waterline? I tried to post a video but extension .mov is not allowed and all my stuff is apple....
            Attached Files


            • #7
              Oh, please pay no attention to the finish, I will be detailing her again.....
              Last edited by biggsgolf; 06-21-2020, 05:22 PM.


              • #8
                Yes, lots of fun and anticipation, lol. As of this morning I can report that she is successfully submerged and surface trimmed! Thanks for all the detailed input that helped me achieve this milestone! Pool testing next week at my Corolla, NC Sub Base.