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Armstrong Siddeley Jaguar Major / Panther

as-panther



The Armstrong Siddeley Panther was a 27-litre 14-cylinder twin-row air-cooled radial aero engine developed by Armstrong Siddeley. First run in 1929, it was originally named the Jaguar Major.

 

 AS-Panther-02
Panther IIA
 
 AS-Panther-03
Panther IIA

 

Applications:

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
Westland Wapiti V (first prototype)

 

Panther IIA
Type: 2 row 14-cyl radial
Overall diameter: 46.45 in
Length: 31.35 in
Bore 5.25 in
Stroke: 5.5 in
Compression ratio: 5-1
Reduction gear: Epicyclic .657-1
Crankshaft rotation: left hand tractor
Airscrew shaft rotation: left hand tractor
Normal crankshaft rpm: 2000
Max crankshaft rpm: 2300
Rated altitude: 3000 ft
BHP normal rpm 3000 ft: 535
BHP max rpm 3000 ft: 600
Dry weight: 1004 lb
Oil spec: Spec. D.T.D. 109
Oil consumption 90% pwr normal rpm: 12-16 pint/hr
Normal oil pressure: 50 lb/sq.in
Min permissible oil pressure: 30 lb/sq.in
Oil release valve lifts at: 65 lb/sq.in
Min outlet oil temp before flight: 15 deg C
Oil circulation: 3-5 gal/min
Carburetter: 1 x Claudel-Hobson A.V.T.70.H
Fuel consumption 90% pwr: .535 pints/BHP/hr
Spark plugs: 2 x Lodge A2
Plug gap: .012 - .015 in
Magnetos: 2 x B.T.H. SC.14-1A
Firing order: 1R, 2F, 3R, 4F, 5R, 6F, 7R, 1F, 2R, 3F, 4R, 5F, 6R, 7F


Panther VII
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: Fully supercharged
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)

 

 

 


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