G-5 MTB found and raised off Sevastopol

[Juha Tompuri]

http://portnews.ru/news/292519/

Regards, Juha

[Interbellum]

Very good that they found and raised off an interesting example of G-5 MTB (I am sure on 99% that this is TKA-61 built in 1935 which sank in Sevastopol harbor 15.06.1942 during the last Axis offensive, after collision with border patrol motor boat SKA-0133 at night under enemy fire when they tried to evacuate the last defenders from the North harbor; SKA-0133 survived), also in a one of the most WWII extremelly hard and glorious places - Sevastopol, and close to 75th anniversary of the Victory. But very bad that naval guys broke the damaged by collision MTB in half during rising operation (they should know that aluminium hull is extremelly subjected to electrochemical corrosion in sea water, for instance, 1930-s Soviet naval instructions recommended to wash the G-5's hull with the fresh water after every return to base to avoid its corrosion!).....

https://www.youtube.com/watch?v=LKSQCC3XEtk
https://www.youtube.com/watch?v=uxoTeGfJ2aU

[OldBill]

Thanks for this and the videos, it's always a pleasure to see history being reclaimed.

[Juha Tompuri]

they should know that aluminium hull is extremelly subjected to electrochemical corrosion in sea water,

Duralumin, IIRC.

Regards, Juha

[Interbellum]

they should know that aluminium hull is extremelly subjected to electrochemical corrosion in sea water,

Duralumin, IIRC.

Regards, Juha

Of course, because G-5 was designed by aircraft engineer A.N. Tupolev who widely used duralumin for his aircraft. Aluminium-copper alloys are vulnerable to electrochemical corrosion, specially in the sea water.