title: Alliance P.2 Seabird
text: # Alliance P.2 Seabird
  
  The Alliance P.2 Seabird was a British single-engined long-range biplane designed by J.A. Peters to enter the Daily Mail £10,000 Atlantic Flight Prize. In the end it did not compete but became the first aircraft to fly from London (Acton) to Madrid non-stop on 31 July 1919.
  
  ## Design and development
  
  The Alliance Aeroplane Company which had constructed aircraft under licence during the First World War decided to build aircraft for the civil market. The Seabird was a long-range two-seat biplane powered by a 450 hp (336 kW) Napier Lion piston engine. With an endurance of 21 hours it had an enclosed cabin for the crew of two and two aircraft were built.
  
  ## Operational history
  
  On 17 April 1919 Peters the designer paid the £100 entrance fee to the Royal Aero Club as entry fee for the Alliance biplane into the competition for the Daily Mail £10,000 Atlantic Flight Prize. Flown by Peters with Captain W.R. Curtis of the Royal Air Force the first Seabird (registration G-EAGL) carried out a trial flight on 31 July 1919 when it made the first direct non-stop flight between London and Madrid, 900 miles in just under eight hours. The aircraft did not in the end compete in the Atlantic competition.
  
  The second aircraft G-EAOX was entered into an Australian Government prize of £10,000 for a flight from Great Britain to Australia. Flown by two Australian airmen, Lieutenant Roger Douglas (pilot) and Lieutenant J.S.L. Ross (Navigator), G-EAOX left Hounslow Heath Aerodrome on 13 November 1919 but a few minutes into the flight the Seabird crashed near Surbiton killing both airmen.
  
  The company never recovered from the accident and was closed down in 1920.
  
  ## Specifications
  
  Data fromBritish Civil Aircraft since 1919 Volume 1
  
  General characteristics
  
  * Crew: 2
  * Length: 33 ft 6 in (10.21 m)
  * Wingspan: 53 ft 0 in (16.16 m)
  * Wing area: 700 sq ft (65.1 $m^2)$
  * Empty weight: 2,600 lb (1,179 kg)
  * Gross weight: 7,400 lb (3,357 kg)
  * Powerplant: 1 × Napier Lion piston engine , 450 hp (336 kW)
  
  Performance
  
  * Maximum speed: 140 mph (225 km/h, 120 kn)
  * Range: 3,000 mi (4,828 km, 2,600 nmi)
  * Endurance: 21 hours 0 minutes
  