Back to Bike FinderYears: 1957 · 1956 · 1955
Douglas Dragonfly
1955Sportbike

Douglas Dragonfly

Key specifications

Engine
348 cc
Power
17 HP
Weight
166 kg
Fuel type
petrol
Fuel capacity
6.6 L
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1955 Douglas Dragonfly: A Vintage Sport Icon Nestled in the rich tapestry of mid-century motorcycle history, the 1955 Douglas Dragonfly stands as a testament to the innovative spirit of British engineering. Positioned within the sport category, this motorcycle captures the essence of post-war optimism, combining style with a purpose-built performance. With its sleek lines and distinctive frame, the Dragonfly is not just a motorcycle; it’s a piece of art that resonates with enthusiasts and collectors alike. Designed for those who seek both agility and vintage charm, this machine has become a revered symbol of its era, embodying the adventurous spirit of the open road. At the heart of the Dragonfly lies a 348 cc twin-cylinder, four-stroke engine that delivers a respectable 17 horsepower at 5,500 RPM. Though modest by today’s standards, this power output offers a lively ride, particularly given the bike's lightweight design at just 166 kg (366 pounds). The Dragonfly’s engine is paired with a traditional carburettor fuel system and coil ignition, creating a responsive and engaging riding experience. Coupled with a chain final drive, riders will appreciate the seamless power delivery that makes navigating twisty roads and city streets exhilarating. With a fuel consumption rate of 4.3 litres per 100 km, the Dragonfly offers commendable efficiency, allowing riders to enjoy extended journeys without frequent stops at the pump. The Douglas Dragonfly is engineered with a tubular duplex cradle frame that not only enhances durability but also contributes to the motorcycle's nimble handling characteristics. The leading link front suspension, combined with hydraulic shock absorbers at the rear, provides a smooth ride over varied surfaces, making it a versatile choice for both rural and urban adventures. Stopping power is delivered through reliable drum brakes at both the front and rear, ensuring a reassuring grip when it matters most. With a fuel capacity of 25 litres (6.61 gallons), the Dragonfly is equipped for longer rides, allowing enthusiasts to enjoy the freedom of the road without constant refueling. **

Pros

    Cons

    • Timeless Design: The classic aesthetics and unique frame of the Dragonfly make it a head-turner, ideal for vintage motorcycle shows and gatherings.
    • Lightweight & Agile: Weighing in at just 166 kg, the Dragonfly offers exceptional maneuverability, perfect for both city commuting and spirited rides in the countryside.
    • Fuel Efficient: With impressive fuel economy of 54.7 miles per gallon, riders can enjoy longer journeys without worrying about frequent stops at gas stations.
    • Limited Power Output: The 17 HP engine may not satisfy those seeking high-performance thrills, particularly compared to modern sport motorcycles.
    • Drum Brakes: While reliable for its time, the drum brake system may not inspire confidence for riders accustomed to the superior stopping power of modern disc brakes.
    • Vibration: The vintage engine design may produce noticeable vibrations at higher RPMs, which could detract from the comfort on longer rides.

    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
    Fuel Consumption
    4.30 litres/100 km (23.3 km/l or 54.70 mpg)
    Greenhouse Gases
    O2
    g/km. (
    O2
    -
    Carbon
    dioxide emission)
    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