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]

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

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

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