SSL are unknown initials of a Spanish engineer who presented a heavy oil engine, of the “barrel” type with axial cylinders and double pistons acting on inclined plates.

“S.L.L engine.”

-The design is clear and well resolved. It belongs to the time when many engines of this type appeared, which were presented at different exhibitions such as those in Paris or Milan.

-In this A to Z publication quite a few examples of these “barrel” or “revolver” type engines appear.