In dictionaries:
Armstrong Siddeley
a British engineering group that operated during the first half of the 20th century.
Hawker Siddeley Harrier
a British jet-powered attack aircraft designed and produced by the British aerospace company Hawker Siddeley.
Hawker Siddeley Nimrod
a retired maritime patrol aircraft developed and operated by the United Kingdom.
Hawker Siddeley Trident
The Hawker Siddeley HS-121 Trident (originally the de Havilland DH.121 and briefly the Airco DH.121) is a British airliner produced by Hawker Siddeley.
Hawker Siddeley
a group of British manufacturing companies engaged in aircraft production.
Hawker Siddeley HS 748
The (formerly Avro HS 748) a medium-sized turboprop airliner originally designed and initially produced by the British aircraft manufacturer Avro.
Hawker Siddeley P.1154
a planned supersonic vertical/short take-off and landing fighter aircraft designed by Hawker Siddeley Aviation.
Hawker Siddeley P.1127
The Hawker P.1127 and the Hawker Siddeley Kestrel FGA.1 are the British experimental and development aircraft that led to the Hawker Siddeley Harrier, the first vertical and/or short take-off and landing jet fighter-bomber.
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