Armstrong Siddeley Tiger

For the 1920 V12 engine, see Siddeley Tiger

Tiger
Armstrong Siddeley Tiger at the Science Museum (London)
Type	Radial engine
Manufacturer	Armstrong Siddeley
First run	1932
Major applications	Armstrong Whitworth Ensign Blackburn Shark

The Armstrong Siddeley Tiger was a British 14-cylinder air-cooled aircraft radial engine developed by Armstrong Siddeley in the 1930s from their Jaguar engine. The engine was built in a number of different versions but performance and dimensions stayed relatively unchanged. The Tiger VIII was the first British aircraft engine to use a two-speed supercharger.^[1][2]

Applications

• Armstrong Whitworth A.W.19
• Armstrong Whitworth AW.23
• Armstrong Whitworth A.W.29
• Armstrong Whitworth Ensign
• Armstrong Whitworth Whitley
• Blackburn B-6
• Blackburn B-7
• Blackburn Shark
• Blackburn Ripon
• Fairey G4/31
• Handley Page H.P.51
• Short Calcutta

Engines on display

A preserved Armstrong Siddeley Tiger is on display at the Science Museum (London).

Specifications (Tiger VIII)

Data from Lumsden.^[3]

General characteristics

• Type: 14-cylinder supercharged two-row air-cooled radial engine
• Bore: 5.5 in (139.7 mm)
• Stroke: 6.0 in (152.4 mm)
• Displacement: 1,995 in³ (32.7 l)
• Length: 64.6 in (1,641 mm)
• Diameter: 50.8 in (1,290 mm)
• Dry weight: 1,287 lb (584 kg)

Components

• Valvetrain: Two pushrod-actuated valves per cylinder
• Supercharger: Two-speed centrifugal type supercharger, first gear ratio 5.34:1, second gear 7.96:1.
• Fuel system: Claudel-Hobson carburettor
• Fuel type: 87 octane rating petrol
• Cooling system: Air-cooled
• Reduction gear: Spur, 0.594:1

Performance

• Power output:
  
• 907 hp (677 kW) at 2,375 rpm for takeoff
• 850 hp (634 kW) at 2,450 rpm at 7,150 ft (2,180 m) – first supercharger gear
• 771 hp (575 kW) at 2,450 rpm at 16,240 ft (4,950 m) – second supercharger gear
• 582 hp (434 kW) at 2,200 rpm economy cruise
• Specific power: 0.45 hp/in³ (20.7 kW/l)
• Compression ratio: 6.25:1
• Specific fuel consumption: 0.49 lb/(hp•h) (294 g/(kW•h))
• Oil consumption: 0.21–0.42 oz/(hp•h) (8–16 g/(kW•h))
• Power-to-weight ratio: 0.70 hp/lb (1.16 kW/kg)

See also

Related development

• Armstrong Siddeley Jaguar
• Armstrong Siddeley Panther

Related lists

• List of aircraft engines

References

Notes

1. Lumsden 2003, p.78.
2. Gunston 1989, p.18.
3. Lumsden 2003, p.79.

Bibliography

• Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
• Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

External links

• Oldengine.org