Alliance P.2 Seabird

Role  | Long-range biplane
National origin | United Kingdom
Manufacturer  | Alliance Aeroplane Company
Designer  | James Arthur Peters
First flight  | 1919
Number built | 2

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.[1]

## 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.[1] With an endurance of 21 hours it had an enclosed cabin for the crew of two and two aircraft were built.[1]

## 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.[2] 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.[3] 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.[1][4] 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.[4]

The company never recovered from the accident and was closed down in 1920.

## Specifications

Data from [1]British 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 m2) [5]
* 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) [6]
* Endurance: 21 hours 0 minutes

## References

### Notes

1. ↑ 1.0 1.1 1.2 1.3 1.4 Jackson 1973, p. 283
2. ↑ "Atlantic Airmen Still Waiting - Another Entry". The Times (London) (42078): col E, p. 11. 19 April 1919.
3. ↑ "D. Napier & Son, Ltd.". The Times (London) (42210): col F, p. 5. 20 September 1919.
4. ↑ 4.0 4.1 "Two Airmen Killed. Crash Just After Start For Australia.". The Times (London) (42257): col B, p. 9. 14 November 1919.
5. ↑ Flight 15 May 1919, p. 636.
6. ↑ "New Arrivals For The Atlantic Flight - The Alliance Entry". The Times (London) (42096): col C, p. 11. 10 May 1919.

### Bibliography

* Jackson, A.J. (1973). British Civil Aircraft since 1919 Volume 1. London: Putnam. ISBN 0-370-10006-9.
* "The Transatlantic Contest". Flight (15 May 1919): 634–636. http://www.flightglobal.com/pdfarchive/view/1919/1919 - 0634.html?tracked=1.

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