In this 1939 film, we delve into the inner workings of the compression-ignition engine – also know as the oil or diesel engine. Animated diagrams and working models guide us through its principles, demystifying an engine once considered unsuitable for use in a vehicle. --- Shell’s surprising and captivating Historic Film Archive dates from 1934 and covers a rich mix of topics from technology, science and engineering to craftsmanship, motorsport and travelogue. The Shell Film Unit, responsible for the content, was a highly celebrated part of Britain’s Documentary Movement. Key figures from that movement were involved, including: Jack Beddington, Edgar Anstey, Arthur Elton, John Grierson, Kay Mander, Stuart Legg and Douglas Gordon. Its films were wide reaching, often screened in cinemas and through the non-theatric film distribution circuit, which brought film to educational establishments and organisations across the UK. While many films covered technological themes related ...