The 1913 NSU 3.5 HP V-Twin was a significant early motorcycle produced by NSU (Neckarsulmer Strickmaschinen Union), a German company that transitioned from manufacturing knitting machines to becoming a prominent motorcycle and automobile manufacturer. By 1913, NSU was recognized for creating well-engineered, reliable motorcycles, and the 3.5 HP V-Twin was one of their standout models, showcasing innovative engineering and craftsmanship.
Overview
- Manufacturer: NSU (Germany)
- Model Year: 1913
- Class: Touring Motorcycle
Engine
- Type: Air-cooled, V-twin, side-valve engine
- Displacement: ~500 cc
- Power Output: 3.5 horsepower (hence the model name)
- Fuel System: Carburetor
- Ignition: Magneto ignition
Transmission
- Type: Single-speed with belt drive
- Clutch: No clutch; direct belt drive required the rider to pedal to assist starting or climbing steep hills.
Performance
- Top Speed: Approximately 45–50 mph (72–80 km/h)
- Fuel Economy: Highly efficient for its time
Design and Features
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Engine Layout:
- The V-twin engine was advanced for its era, offering smooth power delivery and improved torque for better performance on varied terrains.
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Frame:
- Sturdy tubular steel frame, designed to handle the stresses of the engine and accommodate long-distance touring.
- Diamond-style frame construction, which was common in early motorcycles.
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Suspension:
- Front Suspension: Leading-link fork with basic springing to absorb shocks from uneven roads.
- Rear Suspension: Rigid frame with no rear suspension.
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Belt Drive System:
- A leather or rubber belt connected the engine to the rear wheel. This setup was simple but required maintenance and frequent adjustments.
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Wheels and Tires:
- Spoked wheels with pneumatic tires provided better comfort and grip than earlier solid rubber tires.
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Braking:
- Basic bicycle-style rim brakes, which were minimal but typical for motorcycles of this era.
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Additional Features:
- A large acetylene-powered headlamp for nighttime visibility.
- A toolbox mounted on the frame for carrying essential tools and spares.
Historical Context
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Early Motorcycle Evolution:
The NSU 3.5 HP V-Twin was part of the rapidly growing motorcycle industry in the early 20th century. Manufacturers like NSU were experimenting with engine configurations and designs to improve performance and reliability. -
Military and Civilian Use:
While primarily aimed at civilian riders, motorcycles like the NSU 3.5 HP V-Twin were also used for military purposes during World War I, owing to their reliability and ease of maintenance. -
Competition:
Competing against British and American manufacturers like Harley-Davidson, Indian, and Triumph, NSU motorcycles were highly regarded in Europe for their precision engineering.
Legacy
- Innovative Engineering:
The 1913 NSU 3.5 HP V-Twin helped establish NSU as a leader in the early motorcycle industry, laying the groundwork for their future success. - Collector Appeal:
Today, this model is a rare and valuable collector's item, admired for its elegant simplicity and historical significance. Restored examples are often seen at vintage motorcycle events and museums.
Summary
The 1913 NSU 3.5 HP V-Twin stands as a remarkable example of early 20th-century motorcycling innovation. Its reliable V-twin engine, simple belt-drive system, and rugged frame made it a favorite among riders of the era. As a pioneering model from NSU, it remains an important part of motorcycle history, cherished by enthusiasts worldwide.
You may purchase a print of the 1913 NSU 3.5 HP V-Twin in our online gallery.
Taken at the Hilton Head Island Concours d'Elegance & Motoring Festival.
