Web Analytics

 Martinsyde - 676 V-twin & side-car articulé
 Back to brands list


Martinsyde V-twin & side-car articulé  motocyclette motorrad motorcycle vintage classic classique scooter roller moto scooter
Photo ou archives : M. Woollett
8305

Capacity : 676
Model : V-twin & side-car articulé
Production : 1922 -
Category : (R) Street Bike

MARTINSYDE

677 V-twin & Articulated Sidecar - 1922

Banking on success

At the end of WWI, Martinsyde, Britain's third largest aircraft manufacturer, was forced – like so many other companies – to look for new products to make. The motorcycle sector looked promising, and chief engineer Howard Newman quickly drew up plans for a high-quality V-twin.

Unusual Layout

This long-stroke engine (70x88mm) of 677cc had an unusual F-head configuration, with overhead exhaust valves operated by pushrods and rockers, and side intake valves.

Racing at Brooklands

Martinsyde – an abbreviation of the names of its founders, Martin and Handasyde – was based at Woking, just down the road from the famed Brooklands circuit where its aircraft were erected. It had some notable successes on the famed concrete oval, such as its victory in the 750cc class of the 1921 500-mile race, when a Martinsyde covered the distance at an average of over 55 mph, a remarkable feat for the time. Sidecar racing was equally popular at Brooklands, and in June 1922, a Martinsyde with a banking sidecar appeared on the track. Paneled in aluminum with a streamlined celluloid windshield (a reminder of Martinsyde's long aviation experience), it had a tubular chassis linked to the frame of the bike by articulated joints, a method also successfully used by the Flexible Sidecar company of Ohio.

SPECIFICATIONS

Engine: 677cc (70x88 mm) air-cooled V-twin four-stroke

Power Rating: 26 hp @ 5000 rpm

Valves: F-head (overhead intake, side exhaust)

Fuel System: Amac carburetor

Transmission: separate 3-speed; chain final drive

Suspension: girder forks with double friction dampers (front); rigid (rear)

Brakes: dummy belt rim (rear)

Wheels: 21 inch (front); 20 inch (rear)

Weight: 346 lb (solo)

Maximum Speed: 98 mph (solo), 70 mph (combination)

Two "speed demons" try their 6 hp Martinsyde V-twin and its articulated sidecar on the Brooklands banking in June 1922.





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.