Changes

   

   

==Power sources==

==Power sources==

Various different power sources have been used on submarines over the years.  The ''Hunley'' was powered by its crew turning a crank which was connected to the propeller.  [[Gasoline|Petrol]] engines have also been used, but they gave way to [[diesel engine]]s.  [[Hydrogen peroxide]] was used in some German submarines during [[World War II]].  More recently [[nuclear power]] has been used.  It should be noted it this context that the term "nuclear submarine" refers to a submarine that uses nuclear power for propulsion, not necessarily one which carries [[nuclear weapon]]s.

Various different power sources have been used on submarines over the years.  The ''Hunley'' was powered by its crew turning a crank which was connected to the propeller.  [[Gasoline|Petrol]] engines have also been used, but they gave way to [[diesel engine]]s.  The petrol or diesel engine drives a [[generator]], which charges a [[Battery (electrical)|battery]], and the battery supplies an [[electric motor]] which propels the submarine.  The petrol or diesel engine can only be run when the submarine is on the surface, to recharge the battery.

 

[[Hydrogen peroxide]] was used in some German submarines during [[World War II]].  More recently [[nuclear power]] has been used.  It should be noted it this context that the term "nuclear submarine" refers to a submarine that uses nuclear power for propulsion, not necessarily one which carries [[nuclear weapon]]s.

==United States Navy==

==United States Navy==