Peugeot 500 Sport
| Peugeot | |
|---|---|
 Peugeot 500 Sport |
|
| Peugeot 500 Sport | |
| Manufacturer | Peugeot |
| Production period | 1913 to 1914 |
| class | Racing motorcycle |
| Motor data | |
| Four-stroke engine , air-cooled two-cylinder engine, DOHC , four valves per cylinder, drop counter with pump, two Zenith carburettors, Bosch magneto ignition | |
| Displacement (cm³) | 498 |
| Power (kW / PS ) | 15 hp at 5,000 rpm |
| Top speed ( km / h) | 122.2 |
| drive | Chain |
| Brakes | front: none rear: drum brake |
The Peugeot 500 Sport (1913-1914) was a racing motorcycle from the French manufacturer Peugeot . It was the first motorcycle with spur gear-actuated twin camshafts and four valves per cylinder head.
Development and technology
The Swiss engineer Ernest Henry developed a four-valve cylinder head for a racing motorcycle, similar to the Peugeot four-cylinder racing engine (1912) from the automobile industry, with four valves and a roof-shaped combustion chamber. The double camshaft was driven by a cascade of gear wheels, as was later used at MV Agusta . The twin engine with four exhaust ports was technically ahead of its time. However, he suffered from thermal problems that were given by the “limits of the capabilities of metallurgy at that time ”: the cylinder heads tore between the valve bases. The secondary drive took place with a three-speed gearbox to the chain; At the rear, the Peugeot had a foot-operated drum brake, the motorcycle only received suspension through the Druid fork.
Test drives
The test drives that Peugeot undertook in 1913 should prove the reliability of the motorcycle. The racing motorcycle achieved a world record in its displacement class with 122.2 km / h over the flying kilometer. At the French Grand Prix (1913) , the company relied on the more reliable and proven two-cylinder V-engines with simple valve actuation. The French Grand Prix (1914), at which the machine was finally to be used, did not take place because of the First World War . The further development was stopped; It wasn't until 1923 that the engine was revised: a camshaft and two valves per cylinder now ensured stability.
Web links
Individual evidence
- ↑ Ludwig Apfelbeck: Paths to the high-performance four-stroke engine. ISBN 3-87943-578-2 . P. 13
- ^ A b Christian Rey and Harry Louis: Famous Motorcycles. ISBN 3-453-52062-9 . P. 48
- ^ Hans Jürgen Huse: French motorcycles. ISBN 39804987-6-X . P. 52
