Thank you David and Fredrik. Maybe i did not express myself correctly. I know how the flaps/covers work, but i do not know if they were open when the boat operated submerged the way you can see in the pictures of the surfaced vessel. From the Mike, Charlie etc. I know the covers would split open, the plane would extend and then they would be closing, only letting the plane shaft pass through a circular opening. I believe the flaps should be closed when the bow planes are extended, and they are simply open in the pictures to prevent jamming in case there would be ice on the mechanism in arctic waters.
Jörg
Jörg
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