Elizalde Tigre IV

The Elizalde Tigre IV, also known as the ENMA Tigre IV, is a Spanish four-cylinder inverted air-cooled engine designed and built by Elizalde SA shortly after the Spanish Civil War.

Tigre IV
Preserved Elizalde Tigre.
Type	Piston inline aero-engine
Manufacturer	Elizalde SA.

Variants / Designations

Tigre IVA

93 kW (125 hp) version.

Tigre IVB

110 kW (150 hp) version.

Tigre G-IV A

IVA / G-4 (L)-00-125

Tigre G-IV A2

IVA / G-4 (L)-00-125

Tigre G-IV A5

Tigre G-IV B

IVB / G-4 (L)-00-150

Tigre G-IV B5

Tigre G-4 (L)-00-125

IVA / G-IV A

Tigre G-4 (L)-00-150

IVB / G-IV B

Applications

• CASA 1.131
• Dornier Do 25
• AISA I-115
• INTA HM.1

Survivors

Approximately 30 ENMA Tigre IV engines remain airworthy in Britain (as of July 2009), all powering CASA 1.131 aircraft which are Spanish licensed-built versions of the Bücker Jungmann.

Approximately 30 Tigre G-IV B engines are under restoration by the company Air Res Aviation located in Poland. The engines will be mainly intended for Bu-131 Jungmann's airplanes restored by Air Res Aviation.

Specifications (Tigre IVA)

ENMA Tigre IVB installed in a Jungmann biplane

Data from: Janes

General characteristics

• Type: Four-cylinder, in-line, inverted, air-cooled
• Bore: 120 mm (4.72 in)
• Stroke: 140 mm (5.512 in)
• Displacement: 6.3 L (386.3 in³)
• Length: 1144 mm (43.89 in)
• Width: 400 mm (15.76 in)
• Height: 877 mm (34.55 in)
• Dry weight: 120 kg (264 lbs)

Components

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

Performance

• Power output: 93 kW (125 hp) at 2,200 rpm
• Compression ratio: 6:1
• Power-to-weight ratio: 0.77 kW/kg (0.47 hp.lb)

See also

Comparable engines

• Alfa Romeo 110
• Cirrus Major
• de Havilland Gipsy Major
• Hirth HM 504
• Menasco C4

Related lists

• List of aircraft engines

References

Bibliography

• Bridgman, Leonard, ed. (1989). Jane's fighting aircraft of World War II (1995 ed.). New York: Military Press. ISBN 0-517-67964-7.
• Gunston, Bill (1989). World encyclopaedia of aero engines (Fully rev. 2nd ed.). Wellingborough: P. Stephens. ISBN 1-85260-163-9.
• Motor de Aviacion Tigre (.pdf) (in Spanish). Empresa Nacional de Motores de Aviacion SA. 1954. Retrieved 10 February 2017.