Renault 8G

8G
Type	Liquid-cooled V-8 piston engine
National origin	France
Manufacturer	Renault
Major applications	Dorand AR.1,
Developed into	Renault 12F

The Renault 8G was a family of French liquid-cooled V-8 aero engines of the World War I era that produced from 140 hp (100 kW) to 190 hp (140 kW).

Design and development

Construction used separate cast iron blocks for each pair of cylinders, mounted on a light-alloy crankcase with an included vee angle of 50 degrees. Each bank had a single overhead camshaft, shaft-driven through bevel gears. It was equipped with a single dual-choke updraught Zenith carburettor, and twin spark ignition through four magnetos. The crankshaft was a flat plane with three bearings and four throws, each pair of cylinders sharing a master-slave connecting rod onto the same crankpin.

Variants

8G: 140 hp (100 kW)
8Ga: 150 hp (110 kW)
8Gb: 160 hp (120 kW)
8Gc: 175 hp (130 kW)
8Gd: 190 hp (140 kW)
8Gdy: 200 hp (150 kW)
8Ge: 200 hp (150 kW)

Applications

Dorand AR.1 - Renault 8Gd - 1917
Farman F.80 - Renault 8Gd
Dorand AR.2 - Renault 8Gdy

Specifications (8Gd)

Section on cylinder

Data from ^[1]

General characteristics

Type: 8-cylinder naturally aspirated liquid-cooled 50° "Vee" piston aircraft engine
Bore: 125 mm (4.9 in)
Stroke: 150 mm (5.9 in)
Displacement: 14.7 L (900 in³)

Components

Valvetrain: Overhead camshaft-actuated, single intake and single exhaust valve per cylinder
Fuel system: Twin-choke updraught carburettor
Oil system: Wet sump
Cooling system: Water

Performance

Power output:
192 hp (143 kW) at 1,500 rpm
196 hp (146 kW) at 1,550 rpm son régime normal
200 hp (150 kW) at 1,600 rpm son régime maximum
Specific power: 9.93 kW/L (0.22 hp/in³)

References

^ Renault 190 HP Notice descriptive et Règlement. Renault.

External links

Renault Moteur d'aviation 150 chevaux - Notice descriptive sur le Fonctionnement et l'Entretien. Renault. (Renault 8Ga 150hp)

[Renault_190_manual-1] Renault 190 HP Notice descriptive et Règlement. Renault.

[1]