
Douglas Dragonfly
Key specifications
Overview
Introducing the 1957 Douglas Dragonfly, a remarkable motorcycle that captures the essence of British engineering and the spirit of the sportbike era. Emerging from a storied lineage of motorcycle innovation, the Dragonfly was designed to appeal to riders seeking both performance and style. With its distinctive design and robust capabilities, this lightweight sport motorcycle carved a niche in a competitive market, standing out for its unique blend of classic aesthetics and practical performance. At the heart of the Dragonfly is a 348cc twin-cylinder, four-stroke engine that produces 17 horsepower at 5500 RPM, delivering an exhilarating ride for enthusiasts. This power plant, coupled with a chain final drive, ensures a responsive throttle and fluid acceleration. The Dragonfly's lightweight frame, weighing in at just 166 kg (366 pounds), offers an impressive power-to-weight ratio of 0.1024 HP/kg, making it quick and nimble on the road. Riders will appreciate the engaging experience provided by the carburettor fuel system, which allows for smooth power delivery, complemented by a coil ignition system that ensures reliable starts and consistent performance. The Dragonfly's design is not only visually striking but also functionally sound. The tubular duplex cradle frame provides excellent rigidity and stability, while the leading link front suspension enhances handling and cornering capabilities. The motorcycle is equipped with reliable drum brakes, both front and rear, allowing for confident stopping power. The rear suspension features hydraulic shock absorbers, which help smooth out the bumps in the road, making for a comfortable ride over various terrains. With a fuel capacity of 25 liters (6.61 gallons), the Dragonfly is designed for longer journeys, ensuring that riders can enjoy extended time in the saddle without frequent stops. **
Pros
- Lightweight and Agile: At 166 kg, the Dragonfly offers impressive maneuverability, making it a joy to ride in both urban settings and twisty backroads.
- Classic Styling: The design reflects the charm of the 1950s, appealing to vintage motorcycle enthusiasts and collectors alike.
- Smooth Power Delivery: The engine's carburettor system provides responsive throttle response, enhancing the overall riding experience.
Cons
- Limited Power Output: With only 17 HP, the Dragonfly may feel underpowered for riders seeking high-performance thrills.
- Drum Brakes: While reliable, the drum brake system may not offer the stopping power and responsiveness of modern disc brakes.
- Older Technology: As a vintage model, the Dragonfly lacks some modern conveniences and advancements in motorcycle technology, which may deter some contemporary riders.
Technical details
Source specification data
- Make
- Douglas
- Model
- Dragonfly
- Category
- Sport
- Power
- 17.00 HP (12.4 kW)) @ 5500 RPM
- Ignition
- Coil
- Fuel System
- Carburettor
- Displacement
- 348.00 ccm (21.23 cubic inches)
- Engine Details
- Twin, four-stroke
- Transmission Type Final Drive
- Chain
- Dry Weight
- 166.0 kg (366.0 pounds)
- Fuel Capacity
- 25.00 litres (6.61 gallons)
- Power Weight Ratio
- 0.1024 HP/kg
- Seat
- Dual
- Wheels
- Spoked
- Frame Type
- Tubular duplex cradle
- Rear Brakes
- Expanding brake (drum brake)
- Front Brakes
- Expanding brake (drum brake)
- Rear Suspension
- Hydraulic Shock Absorber
- Front Suspension
- Leading link