Boland V-8

Aircraft Engine

V-8

Boland 60 hp V-8
Type	Piston aero engine
National origin	United States
Manufacturer	Boland Airplane and Motor Company

The Boland V-8 was an aircraft engine that was developed by the Boland Brothers for use in their tailless aircraft. Between 1908 and 1914, four versions of this motor were produced ranging in power from 60 hp (45 kW) to 125 hp (93 kW). The Boland motors all used an unusual concentric overhead valve. This arrangement positioned the intake valve in the middle of the exhaust valve. These were actuated by a single push rod and rocker arm.^[1]^[2]

Variants

60 HP: The prototype of this motor first appeared in a Boland aircraft 1908. According to a Boland advertisement from 1911, they claimed that this single original motor powered all of the various iterations of the early Boland aircraft for three years without the need for repair or rebuild^[1]
70 HP: Bore: 4 in (101.60 mm), Stroke: 4.5 in (114.30 mm), Displacement: 452.04 cu in (7.41 L), Weight: 255 lb (116 kg)^[2]
100 HP: Bore: 4.5 in (114.30 mm), Stroke: 5.5 in (139.70 mm), Displacement: 699.76 cu in (11.47 L), Weight: 325 lb (147 kg)^[2]
125 HP: This motor was mentioned in a 1914 Boland advertisement.

Applications

Boland 1911 Tailless Biplane (60 HP)
Shieder 1911 aeroplane (60 HP)^[3]
Boland 1911 Conventional Biplane (60 HP)^[1]
Boland 1912 Tailless Biplane (60 HP)^[4]
Spainour 1913 monoplane (60 HP)^[5]
Boland 1914 Monoplane Flying Boat (70 HP)^[6]

Specifications (60 HP)

Data from Airplane Engine Encyclopedia.^[2]

General characteristics

Type: 8-cylinder Vee piston engine
Bore: 4 in (101.60 mm)
Stroke: 4 in (101.60 mm)
Displacement: 402.08 cu in (6.59 L)
Dry weight: 240 lb (110 kg)

Components

Valvetrain: Concentric overhead valve
Fuel system: 1 Schebler carburetor
Fuel type: Gasoline
Cooling system: Water
Ignition: Bosch or Mea high tension magnetos

Performance

Power output: 60 hp (45 kW) at 1,400rpm

References

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^ ^a ^b ^c Aeronautical Society of America; Aero Club of Pennsylvania (1907). Aeronautics Vol.9-10. Smithsonian Libraries. New York. pp. 60, 102, 158.
^ ^a ^b ^c ^d Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio: THE OTTERBEIN PRESS. pp. 99-100.
^ Aeronautical Society of America; Aero Club of Pennsylvania (1907). Aeronautics Vol. 7-8. Smithsonian Libraries. New York. pp. 134.
^ Aeronautical Society of America; Aero Club of Pennsylvania (1907). Aeronautics Vol. 11-12. Smithsonian Libraries. New York. pp. 174.
^ Aircraft. Smithsonian Libraries. New York, Lawson Publishing Company. 1910. pp. 116.{{cite book}}: CS1 maint: others (link)
^ Reed Business Information Ltd (1914-10-16). Flight International Magazine 1914-10-16. {{cite book}}: |last= has generic name (help)