Rafi, look on second page of this thread, at the huge beautiful pictures I made, do what it says.
then you go into your sh5/data/submarine/sub you want to change folder, OPEN the Nss_uboat7xx.Gr2 file with goblin editor, then Merge the file with the same name, only it ends with .sim. from there you go into the project tree column, doubleclick unit_submarine. the diesel engins is under propulsion, the electric, is under, well, electric propulsion, change to what you want, then goto file, save. you may need to begin a new career to see the changes youve made. also anything over about 25kn makes your sub a bit wiggly under time compression, but nothing like in sh3-4 where you would crash dive to 900m before coming out of time compression, lol. also not a good idea too make full rudder changes under high speed in shallow waters while submerged, you dive to around 25m if you do. Hope this helps you out.
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