True metal!

engine start

engine start up

start up

submarine

engine start up procedure

engine start sound

engine startup sound

engine start up smoke

cold start

engine

diesel engine

diesel

u-boat

u-boot

submarine engine

submarine engine start up

diesel submarine engine start

u-boot motor

u-boot motor start

submarine engine working

kiel-wik

german

procedure

submarine engine start

sound

ww2

world war 2

2. weltkrieg

starting

starting up

starting of train engine