The Sunbeam 1000 HP ''Mystery'', or "''The Slug''", is a

land speed record The land speed record (LSR) or absolute land speed record is the highest speed achieved by a person using a vehicle on land. By a 1964 agreement between the Fédération Internationale de l'Automobile (FIA) and Fédération Internationale de M ...

-breaking car built by the

Sunbeam A sunbeam, in meteorological optics, is a lightbeam, beam of sunlight that appears to radiate from the position of the Sun. Shining through openings in clouds or between other objects such as mountains and buildings, these beams of light scatter ...

car company of

Wolverhampton Wolverhampton ( ) is a city and metropolitan borough in the West Midlands (county), West Midlands of England. Located around 12 miles (20 km) north of Birmingham, it forms the northwestern part of the West Midlands conurbation, with the towns of ...

that was powered by two

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

s. It was the first car to travel at over 200 mph. The car's last run was a demonstration circuit at

Brooklands Brooklands was a motor racing circuit and aerodrome built near Weybridge in Surrey, England, United Kingdom. It opened in 1907 and was the world's first purpose-built 'banked' motor racing circuit as well as one of Britain's first airfields, ...

, running at slow speed on only one engine. It is today on display at the

National Motor Museum, Beaulieu The National Motor Museum (originally the Montagu Motor Museum) is a museum in the village of Beaulieu, set in the heart of the New Forest, in the English county of Hampshire. History The museum was founded in 1952 by Edward Douglas-Scott ...

Design

Louis Coatalen's Automobiles Talbot-Darracq team was short of funds and so little new development was possible. The engines were a pair of Sunbeam Matabele 22.4 litre aircraft engines, previously used in a

powerboat A motorboat or powerboat is a boat that is exclusively powered by an engine; faster examples may be called "speedboats". Some motorboats are fitted with inboard engines, others have an outboard motor installed on the rear, containing the inter ...

. Although best known as the "1000 HP" car, its actual power was closer to 900 hp (670 kW). One engine was mounted ahead of the driver, one behind. The rear engine was started first by compressed air, then the front engine was started through a mechanical friction clutch. Once synchronised, they were locked together with a

dog clutch A dog clutch (also known as a dog box, dog gears, dog ring, clutch dog, or positive clutch) is a type of clutch that couples two rotating shafts or other rotating components by engagement of interlocking teeth or dogs rather than by friction. T ...

for the record attempt. The car was designed by Captain Jack Irving, having new features such as all-enveloping bodywork that assisted aerodynamics. The car also had specially-made tyres capable of withstanding 200 mph, although only rated for 3½ minutes at these speeds.National Motor Museum guidebook, Beaulieu One more primitive feature was the final drive to the rear axle using a pair of chains. Only weeks before the record attempt, it was speculated that J. G. Parry-Thomas had been decapitated when a similar chain in his car '' Babs'' had broken at speed. Later investigation of the recovered wreckage suggested instead that the rear right-hand wheel had failed, overturning Babs. Although the Sunbeam's chains were enclosed below an armoured steel housing, these covers had been designed from the beginning, they were not added after Parry-Thomas' accident.

Record

The Sunbeam 1000 HP was the first non-American car to run on Daytona Beach for a

attempt. On 29 March 1927, Henry Segrave drove the car to a new land speed record of 203.79 miles per hour (327.97 km/h), the first car to reach a speed over 200 mph (320 km/h).

References

Bibliography

Notes

External links