Built as a test, and it worked!
The air is stored in 4 bottles. The pneumatic hoses are connected to a T bar that’s just simply placed in a 3mm hole in the bottle cap.
The design of the V4 is not mine, I built it from a time lapse by OOOONeoGamerOOOO.
His V4: https://www.youtube.com/watch?v=nNoF8CuBTYw&list=UUJz59r1s6qsQEK55v4aJhGw&feature=c4-overview
The hull is waterproofed with plastic foil.
Post time: Jun-16-2017