Aeromarine B-45

The Aeromarine B-45 is an aircraft engine built by the Aeromarine Plane and Motor Company in 1915. The B-45 shares the same bore, stroke and valve configuration as the B-90, except in a 45° Vee configuration. The other primary difference are cast aluminum cylinders in place of the B-90's cast iron resulting in a 40 lb (18 kg) weight savings.^[1][2]

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

Specifications

Data from Airplane Engine Encyclopedia^[2]

General characteristics

• Type: 8-cylinder 45° 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)
• Length: 42.875 in (1,089.02 mm)
• Width: 22.375 in (568.32 mm)
• Height: 36.875 in (936.62 mm)
• Dry weight: 420 lb (190 kg)
• Designer: Joseph Boland

Components

• Valvetrain: 2 intake and 2 exhaust valves per cylinder, DOHC
• Fuel system: Single 1.75 in. duplex Zenith carburetor
• Fuel type: gasoline
• Cooling system: Water
• Reduction gear: .571:1
• Ignition: 2 Dixie 800 magnetos

Performance

• Power output: 170 hp (130 kW) nominal at 2,635 rpm
• Compression ratio: 5 to 1
• Power-to-weight ratio: 0.40 hp/lb (0.66 kW/kg)