Engine Development Co
of Westminster
A company of Francis Edward Dyke Acland and William Joseph Still. H. A. D. Acland was manager of the company (1920).
c.1917 A two-stroke experimental engine was installed at the Chiswick Laboratory of the developers which produced 400 indicated horse-power
1919 The Still Engine Co was formed to acquire the rights to the Still Engine (except for the Japanese rights which had been sold previously) from the Engine Development Co; the engine was said to have a number of advantages including better efficiency and higher specific power.
1919 Captain Francis Edward Dyke Acland made a presentation at the Royal Society of Arts on the new prime mover invented by W. J. Still; Acland and Still had been working on developing the engine for many years[1]
By 1920 agreements had been made with various ship builders and others to licence the engine. The engine had been used with various fuels and in both 2-stroke and 4-stroke form. 3 marine examples had been built and tested afloat[2]