Question: Information: - The de Havilland Gipsy is a British air-cooled four-cylinder in-line aircraft engine designed by Frank Halford in 1927 to replace the ADC Cirrus in the de Havilland DH.60 Moth light biplane. Initially developed as an upright 5litre (300cubic inch) capacity engine, later versions were designed to run inverted with increased capacity and power. - The de Havilland PS.23 or PS.52 Gyron, originally the Halford H-4, was Frank Halford's last turbojet design while working for de Havilland. Intended to outpower any design then under construction, the Gyron was the most powerful engine of its era, producing "dry", and with afterburner ("reheat" in British terminology). The design proved too powerful for contemporary aircraft designs and saw no production use. It was later scaled down to 45% of its original size to produce the de Havilland Gyron Junior, which was somewhat more successful. - The de Havilland Engine Company was an offshoot of the de Havilland aircraft building company, which started life as the 'Engine Division of the de Havilland Aircraft Company' in 1926 producing the famous de Havilland Gipsy aero-engine. The company was merged with Bristol Siddeley (BSEL) engines in 1961 with BSEL subsequently becoming part of Rolls-Royce Limited in 1968. - Bristol is a city, unitary authority area and county in South West England with an estimated population of 449,300 in 2016. It is England's sixth and the United Kingdom's eighth most populous city, and the most populous city in Southern England after London. The city borders the Unitary Authority areas of North Somerset and South Gloucestershire, with the historic cities of Bath and Gloucester to the south-east and north-east, respectively. - An afterburner (or a reheat) is a component present on some jet engines, mostly those used on military supersonic aircraft. Its purpose is to provide an increase in thrust, usually for supersonic flight, takeoff and for combat situations. Afterburning is achieved by injecting additional fuel into the jet pipe downstream of (i.e. "after") the turbine. The advantage of afterburning is significantly increased thrust; the disadvantage is its very high fuel consumption and inefficiency, though this is often regarded as acceptable for the short periods during which it is usually used. - Rolls-Royce Limited owned a British luxury-car and aero engine manufacturing business founded in 1904 by Charles Stewart Rolls and Sir Frederick Henry Royce. Rolls-Royce Limited was incorporated on 15 March 1906 as a vehicle for their ownership of their Rolls-Royce business. Their business quickly developed a reputation for superior engineering quality, "best car in the world", building on F H Royce's existing standing. Rolls-Royce became a leading manufacturer of piston aero-engines after it was brought into building them by the first World War . - Bristol Siddeley Engines Ltd (BSEL) was a British aero engine manufacturer. The company was formed in 1959 by a merger of Bristol Aero-Engines Limited and Armstrong Siddeley Motors Limited. In 1961 the company was expanded by the purchase of the de Havilland Engine Company and the engine division of Blackburn Aircraft. Bristol Siddeley was purchased by Rolls-Royce Limited in 1968. - Blackburn Aircraft Limited was a British aircraft manufacturer that concentrated mainly on naval and maritime aircraft during the first part of the 20th century. - De Havilland Aircraft Company Limited was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in Hertfordshire. - The de Havilland Gyron Junior was a military turbojet engine design of the 1950s developed by the de Havilland Engine Company and later produced by Bristol Siddeley . The Gyron Junior was a scaled - down derivative of the de Havilland Gyron . - Major Frank Bernard Halford CBE FRAeS (7 March 1894 16 April 1955) was an English aircraft engine designer. He is best known for the series of de Havilland Gipsy engines, widely used by light aircraft in the 1920s and 30's. - TurboJET is the brand name for the operations of the Hong Kong-headquartered Shun Tak-China Travel Ship Management Limited, which was established from the joint venture between Shun Tak Holdings Limited and China Travel International Investment Hong Kong Limited in July 1999. It operates hydrofoil ferry services in southern China. What is the relationship between 'de havilland gyron junior' and 'aircraft engine'?
Answer:
subclass of