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B-90
	Aeromarine B-90
Type	V-8 piston engine
National origin	United States
Manufacturer	Aeromarine
First run	1915
Variants	Aeromarine B-45

The Aeromarine B-90 is an aircraft engine built by the Aeromarine Plane and Motor Company in 1915. Aeromarine made two series of V-8 engines. The B series was developed by Joseph Boland and the L series by Charles F. Willard.^[1]^[2]^[3]

Specifications

Data from Airplane Engine Encyclopedia^[3]

General characteristics

Type: 8-cylinder 90° Vee piston engine
Bore: 3.625 in (92.08 mm)
Stroke: 5.125 in (130.18 mm)
Displacement: 423.2 cu in (6.94 L)
Dry weight: 460 lb (210 kg)
Designer: Joseph Boland

Components

Valvetrain: 2 intake and 2 exhaust valves per cylinder, single DOHC camshaft operating rockers
Fuel system: Single 1.75 in. duplex Zenith carburetor
Fuel type: gasoline
Oil system: triple gear pump pressure system; HP to crankshaft; LP to camshaft; LP to oil cooler in radiator
Cooling system: Water
Reduction gear: .571:1
Ignition: 2 Dixie magnetos

Performance

Power output: maximum 166 hp (124 kW) nominal at 2,635 rpm
Compression ratio: 5 to 1
Power-to-weight ratio: 0.3226 hp/lb (0.5304 kW/kg)

References

^ "Motors". www.aerofiles.com. Retrieved 2018-03-23.
^ Faurote, Fay Leone (1919). Aircraft Year Book. American Aviation Publications.
^ ^a ^b Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio: THE OTTERBEIN PRESS. pp. 23–24.

[1] "Motors". www.aerofiles.com. Retrieved 2018-03-23.

[2] Faurote, Fay Leone (1919). Aircraft Year Book. American Aviation Publications.

[Angle-3] Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio: THE OTTERBEIN PRESS. pp. 23–24.

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