title: Aeromarine B-45
text: # 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.
  
  ## Specifications
  
  Data from Airplane Engine Encyclopedia
  
  ### 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)
  