Beardmore was an early engine builder, making a variety of engines, commencing with spark ignition paraffin engines which were produced up to 1911. After this, they turned to Hot-Bulb engines with both solid and blast injection. The four-cylinder engine shown developed 200hp at 280rpm. Cylinder and bore dimensions were 14" X 14-1/2", the engine was directly reversible with no clutch.
The Hot-Bulb is uncooled, and the engine uses crankcase compression for scavenging. The water spray nozzles shown in the illustrations were later discontinued.