Elizalde Tigre IV

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

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.^[1]

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

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.^[2]

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.^[3]

Specifications (Tigre IVA)

ENMA Tigre IVB installed in a *Jungmann* biplane

Data from: Janes^[4]

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)

References

Notes

^ Gunston 1989, p.54.
^ G-INFO - UK CAA database Retrieved: 29 July 2009
^ Strona firmy Air Res Aviation Sp. z o.o.
^ Janes 1998, p.299

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.

External links

[1] Gunston 1989, p.54.

[2] G-INFO - UK CAA database Retrieved: 29 July 2009

[3] Strona firmy Air Res Aviation Sp. z o.o.

[4] Janes 1998, p.299

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