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 Grindlay Peerless - 1000 record Brooklands
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Grindlay Peerless record Brooklands motocyclette motorrad motorcycle vintage classic classique scooter roller moto scooter
Photo ou archives : M. Woollett
7315

Capacity : 1000
Model : record Brooklands
Production : 1929 -
Category : (R) Racing - Record

GRINDLAY PEERLESS

1000cc JAP - 1929

Peerless performer

The Grindlay firm from Coventry initially built sidecars. But in 1923, it began producing motorcycles. The first models were powered, somewhat originally, by Barr & Stroud sleeve-valve engines, initially in 998cc form, then in capacities of 350 and 500cc.

From Sleeves to Poppets

In 1927, Grindlay Peerless (the "Peerless" adjective had been added for the production of bikes) abandoned the Barr & Stroud units in favor of more conventional JAP engines.

Special Crankshaft

In order to publicize its products, the firm signed Bill Lacey, a talented rider and tuner who lived close to the Brooklands track. The first Grindlay Peerless developed by Lacey achieved an important success in 1928: It broke the 500cc hour world record, covering 103.3 miles in 60 minutes. Lacey immediately decided to build a record-breaking machine powered by a 1000cc JAP engine. As with all the machines built by Lacey – he later prepared the Manx Norton with which Mike Hailwood achieved fame in the 1950s – the engine was considerably modified. Lacey made a special crankshaft supported in two enormous roller bearings – four-row on the transmission side, three-row on the camshaft side. Special Martlett pistons raised the compression ratio to 10:1 and the ignition used two spark plugs per cylinder. Lacey failed in his bid with this machine to break the world speed record, but he set a new 100 miles record at an average of 105.3 mph at Montlhéry in 1929.

SPECIFICATIONS

Engine: 996cc (80x99mm) air-cooled V-twin four-stroke; coil dual ignition

Power Rating: 80 hp @ 5800 rpm

Valves: overhead

Fuel System: two carburetors back-to-back in center of V

Transmission: Sturmey-Archer 3-speed, chain final drive

Suspension: girder forks (front); rigid (rear)

Brakes: drum (rear)

Wheels: special Dunlop 28x2.75 inch tires (front & rear)

Weight: 359 lb

Maximum Speed: 120 mph

This Grindlay Peerless record-breaker, powered by a classic 996cc JAP V-twin, was the work of Bill Lacey. The box under the frame holds the battery for the dual ignition.




Le fichier Moto Passion réalisé par François-Marie Dumas réunit près de deux mille photos accompagnées d'un historique très complet des machines présentées.
Il sera progressivement mis à jour ici et toute information complémentaire est la bienvenue sur info@moto-collection.org.

Cette documentation unique, qui constitue sans doute l'encyclopédie la plus exhaustive jamais écrite sur l'histoire de la moto, a été réalisée avec l'assistance de nombreux spécialistes dont principalement Didier Ganneau, Christophe Gaime, Mick Woollett, Jean Goyard, Bernard Salvat, Christian Rey, Yves Campion, Helmut Krackowizer, Michael Dregni, Michel Montange, etc. que je remercie ici.

Disponible sur demande :
- Les fiches originales sur papier
- Les photos et archives signées de mon nom en haute définition ou les documents originaux.
Me contacter sur info@moto-collection.org pour les conditions et droits d'utilisation.