Special Show On “Hot-Bulb Legends” at Retro Classics Stuttgart

“If Need Be, Also With Salad Oil!” – Really simple technology: special show on “hot-bulb legends” at RETRO CLASSICS STUTTGART 2020

04 Moorbereifung ®busf flaig 1

For many years, they were favourites in farm fields until they were gradually replaced by modern diesel tractors: tractors fitted with a hot-bulb engine were already being used at the start of the 20th century in agriculture where they represented an inexpensive and practical alternative to steam engines. The exhibition “Hot-bulb legends” at RETRO CLASSICS® STUTTGART will evoke the great age of the simple, but extremely robust machines which managed to hold their ground in Germany against technical superior competitors right up the middle of the 1950s.

“In particular, the rudimentary technology is now still fascinating,” enthused Hubert Flaig from the Württemberg Bulldog and Tractor Enthusiasts’ Club, which is organising the special show. “The first hot-bulb engines did not have a gearbox, a starter motor or spark plugs. The hot bulb was preheated using a heating lamp over a naked flame. When the bulb reached the required temperature after around five minutes, a valve was opened and fuel was injected. The engine was then started by means of pendulum movements of the flywheels against the compression resistance. Admittedly, this was rather cumbersome.”

However, the majority of single-cylinder veterans are extremely undemanding: “Early hot-bulb tractors were powered by almost everything that was combustible,” said Flaig. “This was often a crucial criterion in making a purchase since there was still no filling station network and the quality of the available fuels was extremely risky at times. If need be, these engines also ran on salad oil.”

The hot-bulb engine, which was manufactured for the first time in 1891 by Richard Hornsby & Sons , started its triumphal march in the English town of Grantham. It enjoyed further success in Sweden, Italy and France before finally arriving in Germany. The exhibits to be presented at RETRO CLASSICS® will also include a Lanz Bulldog HL12 from the 1920s, whose type designation was adopted in common parlance in many places as a synonym for farm tractors. Anyone wanting to see this rustic technology should attend one of the three daily demonstrations on the stand of the Württemberg Bulldog and Tractor Enthusiasts’ Club in Hall 8 where the “original Lanz” will be started very loudly.


RETRO CLASSICS® STUTTGART is the world’s largest trade fair for driving culture and was chosen as the “Show of the Year” in the Historic Motoring Awards in 2018. Lovers and collectors of historic automobiles, marque representatives and members of relevant historic and classic car clubs have long regarded this international platform as a must-attend event at the start of the historic and classic car season. On a total area of around 140,000 square metres the unique concept impresses with its comprehensive range of historic and classic cars, youngtimers, NEO CLASSICS®, US cars, historic motorcycles and commercial vehicles, as well as with its first-class accompanying programme, a huge vehicle selling market and highly interesting special shows.

Dates: 27 February to 1 March 2020, Messe Stuttgart
Special show on “Hot-bulb legends”: Hall 8, Stand No. C10
Further information and photos relating to RETRO CLASSICS® STUTTGART can be found in the Internet at: http://www.retro-classics.de



Report by retro-classics.de

collectorscarworld insta