Hewland

Hewland is a British engineering company, founded in 1957 by Mike Hewland, which specialises in racing-car gearboxes. Hewland was the first company to manufacture a bespoke racing-car gearbox. The first product, the Hewland Mk1, was a minor modification of a Volkswagen box for Lola for their Formula Junior cars. Within a few years the company moved to manufacturing sideplates and gear clusters, only using the VW main case. These gearboxes became widely used in Formula Junior and Formula Three. The first gearbox designed by Hewland was the HD4 in 1963, where the HD stood for Hewland Design. By removing the synchronizers from the original VW Beetle transaxle module, room was created for a 5th forward speed. All gears are straight-cut, constant-mesh type with dog (motorcycle-type) engagement rather than sliding engagement. The driver quickly gets used to the crash type operation since rotating masses are small. In addition to the advantage of the 5th speed with close ratios, the gear ratios may quickly be changed in the field to match the needs of a particular track. Many models of racing cars built in Britain and the U.S. since 1962 have used this transmission.

Read more about Hewland:  ARV Super2

Other articles related to "hewland":

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Australian Formula 2 Championship - Transmission
... The most common transmission in aluminium monoque cars is the 5 speed Hewland Mk9 transaxle, but the Hewland Mk8 and stronger FT200 transaxles are also used ... Like the Hewland Mk8 and Mk9 it is also based on the Volkswagen transaxle ... typically use transaxle housings manufactured by the car manufacturer, although they sport Hewland internals ...
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... Mike Hewland with his assistant John Logan, and also independently Keith Duckworth experimented with a single-cylinder sleeve-valve test engine when looking at Cosworth DFV replacements ... Hewland claimed to have obtained 72 hp (54 kW) from a 500 cc single-cylinder engine, with a specific fuel consumption of 177 gr/HP/hr — 0.45 to 0.39 lb/hp/hr ... Hewland reported also that the highest temperature measured in the cylinder head didn't exceed 150° C, sleeve temperatures were around 140° C, Temp ...
Hewland - ARV Super2
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