A STUART TURNER 'STAR' SINGLE-ACTING HIGH-SPEED ENCLOSED ENGINE, DRIVING A CENTRIFUGAL WATER PUMP BY WHITNEY OF LONDON, CIRCA 1930.

the smallest Stuart twin cylinder inverted enclosed engine, two cylinders 16 x 16 (bore and stroke/mm), mild steel flywheel, 32 x 9 (diameter and width of face/mm), single piston valve across cylinder heads, in the style of Westinghouse, Pump body has cast in "C C Whitney & Co Ldt (sic) London E11", teak base, 24cm x 12.5cm x 2.7cm

*** Stuart range was 'Star', 'Sun', and 'Sirius' for high-speed single acting engines for racing boats.