Armstrong Siddeley Heritage Trust
Armstrong Siddeley Tiger Aero-Engines
The final evolution in the Jaguar series was the Tiger, which retained the Panther's 5.25 inch bore but increased the stroke to 6 inches, giving a swept volume of 32.7 litres. The engine's power ranged from 570hp in the MkI version through to 860hp in the MkVIII. Armstrong Siddeley had previously used the Tiger name in 1918 for a V12 aero-engine
The MkIII Tiger was the first aircraft in the world to be fitted with a two-stage supercharger, an Armstrong Siddeley patented device.
Armstrong Siddeley Tiger Aero-Engine
Some examples of Tiger powered aircraft are shown below.
AW Whitley Credit World War Photos
Armstrong Whitworth Ensign powered by Tiger IXC in flight and unloading passengers at Croydon Aerodrome
Heinkel HE46d Panther
Tiger VIII with detailed description of salient parts. Best viewed by clicking on the image to enlarge it.
Armstrong Siddeley Tiger Aero-Engine Exploded Views
AW 16 Credit Flight International 10441S
AW 23 Credit World War Photos
AW Ensign at Crydon Aerodrome
Leading Particulars of Tiger Engines
Engine Type 14-cylinder, two-row air-cooled, radial aero-engine
Bore 5.5 inch (127 mm)
Stroke 6.0 inch (140 mm)
Volume 1996 cu. in. (32.7litre)
Tractor Drive Geared Epicyclic
Variants
Mk I,
1932 570hp (419kW), Geared Fan, Compression ratio 5.2:1
MK III
193? 610hp (455kW), Geared Fan, Compression ratio 5.35:1
Mk IV
1934 720hp (530kW), Geared Fan, Compression ratio 5.35:1
Mk VI
1936 760hp (589kW), Geared Fan, Compression ratio 6.25:1
Mk VIC
No details known
Mk VIII
1936 860hp (633kW), Two-speed Supercharger, Compression ratio 6.2:1
Mk IX
1936 810hp (596kW), Geared Fan, Compression ratio 6.2:1
Mk IXC
1938 805hp (592kW), Geared Fan, Compression ratio 6.2:1
Mk X
193? 860hp (633kW), Geared Fan.Compression ratio 6.2:1
Note: The plain fan had no supercharging effect; the geared fan gave a mild supercharging effect.
