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

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 1956 Douglas Dragonfly, a remarkable piece of engineering that captured the spirit of post-war Britain with its unique combination of elegance and performance. As a sport motorcycle, the Dragonfly was designed to appeal to riders who craved both power and agility. Douglas, a venerable name in the motorcycle industry, offered a refreshing alternative to the more mainstream brands of the time, carving out a niche for itself with this model. The Dragonfly, with its sleek lines and distinctive frame, was a testament to the innovation and craftsmanship that defined the era. Underneath its striking exterior lies a spirited 348cc twin, four-stroke engine that delivers a modest 17 horsepower at 5,500 RPM. While these numbers may seem humble by modern standards, the Dragonfly's lightweight frame, tipping the scales at just 166 kg (366 lbs), ensures an exhilarating ride. The bike's carburettor-fed engine provides smooth throttle response, making urban commuting or spirited weekend rides a joy. Fuel efficiency is also a standout feature, returning an impressive 54.70 mpg (23.3 km/l) — a testament to the engineering prowess of Douglas. Riders will appreciate the seamless power delivery and the lively acceleration that this machine offers, making it a delightful companion on any road. The Douglas Dragonfly is a showcase of thoughtful engineering, featuring a tubular duplex cradle frame that enhances rigidity and handling. Its suspension system, combining a leading link front suspension with a hydraulic shock absorber at the rear, provides a comfortable ride while maintaining stability through corners. Braking is handled by expanding drum brakes at both ends, offering reliable stopping power for the spirited rider. With a fuel capacity of 25 liters (6.61 gallons), the Dragonfly is ready for longer journeys, allowing riders to explore the open road with confidence and style. **

Pros

  • Agile Handling: The lightweight design and advanced suspension system provide excellent maneuverability and stability, especially in tight corners.
  • Fuel Efficiency: The impressive fuel consumption of 54.70 mpg allows for longer rides without frequent refueling stops.
  • Unique Aesthetic: The distinctive look of the Dragonfly, combined with its classic design elements, makes it a standout choice for vintage motorcycle enthusiasts.

Cons

  • Limited Power: While adequate for its time, the 17 HP output may feel underwhelming to modern riders accustomed to more powerful machines.
  • Drum Brakes: The expanding drum brakes may not offer the same stopping power and responsiveness found in modern disc brake systems.
  • Niche Appeal: As a classic motorcycle, the Dragonfly may require more specialized maintenance and parts, which can be a consideration for prospective owners.

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