Panther/Jaguar Major
Type	Radial engine
National origin	United Kingdom
Manufacturer	Armstrong Siddeley
First run	1929
Major applications	Fairey Gordon

The Armstrong Siddeley Panther was a 27-litre 14-cylinder twin-row air-cooled radial aero engine developed by Armstrong Siddeley. It was originally named the Jaguar Major.^[1]

This list is incomplete; you can help by adding missing items. (November 2023)

AS Panther IIIA

500 hp (370 kW)

AS Panther VII

638 hp (478 kW) at 2,400 rpm with 0.5 psi (3.5 kPa) boost

• Armstrong Whitworth Atlas (Mk II)
• Armstrong Whitworth A.W.XIV Starling MkII
• Armstrong Whitworth A.W.16
• Armstrong Whitworth A.W.35 Scimitar
• Fairey Gordon
• Fokker C.V
• Hawker Hoopoe
• Marinens Flyvebaatfabrikk M.F.11
• Supermarine Air Yacht
• Svenska Aero Jaktfalken (SA-14E)
• Westland Wapiti V (first prototype)

Data from ^[2]

• Type: 14-cylinder twin-row air-cooled radial engine
• Bore: 5.25 in (133.4 mm)
• Stroke: 5.5 in (139.7 mm)
• Displacement: 1,667 cu in (27.3 L)
• Length: 64 in (1.63 m)
• Diameter: 46.45 in (1.18 m)
• Dry weight: 1,047 lb (475 kg)

• Valvetrain: Overhead valve
• Supercharger: Centrifugal
• Fuel system: Carburettor
• Cooling system: Air-cooled

• Power output: 638 hp (478 kW) at 2,400 rpm with 0.5 psi (3.5 kPa) boost
• Compression ratio: 5.1:1
• Power-to-weight ratio: 0.61 hp/lb (1.01 kW/kg)

Related development

• Armstrong Siddeley Jaguar

Related lists

• List of aircraft engines