[PSUBS-MAILIST] Ballast water valves on single hull subs with bow and stern tanks was AW: Uc3 Nautilus

[MerlinSub@t-online.de via Personal_Submersibles]

They have assistance from UC3 Technical team members which rebuild her.
But the valve system from UC3 is anyway so easy to understand that any technican will figure out was it happen.
On the picture of the wreck onshore it is vissible that the deck plate on top of the aft ballast tank is allready remove.  

Read the original police report of the Copenhgane police - they mention : 
The investigations confirm that the sinking of the submarine was allegedly a consequence of a deliberate act
http://www.mynewsdesk.com/dk/koebenhavns-politi/pressreleases/search-continues-in-submarine-case-2107081

This is Peter talking about himself and his mission: https://www.youtube.com/watch?v=N7fNHr46jD0

vbr Carsten 

-----Original-Nachricht-----
Betreff: Re: [PSUBS-MAILIST] Ballast water valves on single hull subs with bow and stern tanks was AW: Uc3 Nautilus
Datum: 2017-08-16T13:36:32+0200
Von: "James Frankland via Personal_Submersibles" <personal_submersibles at psubs.org>
An: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>

Hi Carsten
Have police asked you for assistance?  You would know immediately if
UC3 had a problem with valves or if the boat was sunk intentionally?

regards
James

On 15/08/2017, MerlinSub at t-online.de via Personal_Submersibles
<personal_submersibles at psubs.org> wrote:
>
>
> I like to explain how the ballast water system on UC3 and on Euronaut works.
>
> UC 3
> One hull sub with a bow ballastwater tank and a stern ballastwatertank.
> One ballast butterfly vale on top of each tank - tanks on the bottom open to
> the sea.
> Mechanical linkage from the valves to a troughhull to inside the sub to a
> mechanical hand lever.
> The position of this hand lever shows the position of the butterfly valve.
> Pretty simple and easy. No backup system - if you turn the two hand lever -
> the boat dive.
>
> Euronaut
> One hull sub with a bow ballastwater tank and a stern ballastwatertank.
> One ballast ballvale on top of each tank - tanks on the bottom open to the
> sea.
> Mechanical linkage from the valves to a troughhull to inside the sub to a
> eletrical servo.
> Servo can be drop off in case of a electrical error and replace by a hand
> lever (a pipe)
> Troughhull angel indicator gives you a green light if vale is closed, a red
> for open.
> Dashboard has four green and four red lights for the two ballast tanks
> valves and the
> two eletric remote controled hardtank valves. Servos only operates if you
> switch the converter on.
> You have to press the buttons for 15 Seconds before the ballvalves are fully
> open.
> This give you some time in case you can not read the labels proper and press
> maybe the wrong button..
> In harbour or surface drive only mode the ball valves a sealed by metall
> plates -so even opening the valves will not flood the tank. These metall
> plates have small check screws - so you can test the vales function safe in
> harbour without to dive the boat. This test will be done any time before
> leave the harbour to ensure that both ballast valve are working.
>
> Problem with one hull sub with a bow ballastwater tank and a stern
> ballastwatertank are:
> If only one vale open and the other is still close the boat will half dive
> under an very heavy angle.
> To prevent any mistake like that we only operate the valves only after a
> harbour check and only with closed hatches.
>
> Saftey procedure:
> What ever goes wrong with the system - first close the hatch and endsure the
> pressure hull tightness (seal the exhaust system).
>
> A submarine is only a submarine if the hatch is closed.
> In all other cases it is just a motorboat with a very low freeboard.
>
> vbr Carsten
>
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>

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