Avro 531 Spider Technical Specifications
Service Year: 1918
Type: Single-Seat Biplane Fighter Prototype
National Origin: United Kingdom
Manufacturer(s): A.V.Roe (Avro) - United Kingdom
Production Total: 2
Structural (Crew Space, Dimensions and Weights)
Operating Crew (Typical): 1
Overall Length: 20.51 feet (6.25 meters)
Overall Width: 28.54 feet (8.70 meters)
Overall Height: 7.87 feet (2.40 meters)
Weight (Empty): 970 lb (440 kg)
Weight (MTOW): 1,543 lb (700 kg)
Installed Power and Standard Day Performance
Propulsion: 1 x Clerget (Gwynnes) 9B air-cooled rotary piston engine developing 130 horsepower and driving a two-bladed wooden propeller at the nose.
Maximum Speed: 121 mph (195 kph; 105 knots)
Maximum Range: 249 miles (400 km)
Service Ceiling: 19,685 feet (6,000 meters; 3.73 miles)
Rate-of-Climb: 1,250 feet-per-minute (381 m/min)
Armament / Mission Payload
1 x 7.7mm Vickers machine gun over the nose synchronized to fire through the spinning propeller blades.
Global Operators / Customers
United Kingdom (cancelled)
Model Variants (Including Prototypes)
Model 531 "Spider" - Base Series Name; two prototypes completed.
Model 531A - Proposed refined variant; left incomplete.
Model 538 - Proposed racer form built upon the Model 531 framework.