Herbert Akroyd Stuart (1864-1927)

Inventor of the "hot bulb" oil engine.

His engines were built from 1891 by Richard Hornsby and Sons of Grantham, Lincolnshire, England under the title "Hornsby Akroyd Patent Oil Engine".

Similar engines were built by Bolinder in Sweden and some of these still survive in canal boats.

Richard Hornsby and Sons built the world's first oil-engined railway locomotive "LACHESIS" for the Royal Arsenal, Woolwich, England, in 1896.

The modern Diesel engine is a hybrid incorporating features of engines patented by Akroyd Stuart in 1890 and Rudolf Diesel in 1892.

It combines the Airless Injection of the former with Compression Ignition of the latter.