Briggs & Stratton Vanguard Big Block V-Twin

The Briggs & Stratton Vanguard Big Block V-Twin is a series of American piston engines, designed and produced by Briggs & Stratton of Wauwatosa, Wisconsin for use in commercial applications. They have also been adapted for use as ultralight aircraft engines.^[1]

Vanguard Big Block V-Twin
Type	Aircraft engine
National origin	United States
Manufacturer	Briggs & Stratton

Design and development

The engine is a V-twin four-stroke, 895 cc (54.6 cu in) or 993 cc (60.6 cu in) displacement, fan-driven air-cooled, gasoline engine design. The larger displacement is achieved by increasing the stroke from 78 to 87 mm (3.1 to 3.4 in), but using the same bore of 86 mm (3.4 in). In aviation applications it is used as a direct drive engine, turning a propeller without a reduction drive. It employs a single electronic ignition system and produces 25 to 37 hp (19 to 28 kW) at 3600 rpm.^[1]

Variants

Vanguard Big Block V-Twin 895cc

Model with 895 cc (54.6 cu in) displacement, bore of 86 mm (3.4 in), a stroke of 78 mm (3.1 in) and a power output of 25 to 33 hp (19 to 25 kW) at 3600 rpm^[1][2]

Vanguard Big Block V-Twin 993cc

Model with 993 cc (60.6 cu in) displacement, bore of 86 mm (3.4 in), a stroke of 87 mm (3.4 in) and a power output of 33 to 37 hp (25 to 28 kW) at 3600 rpm^[1][2]

Applications

Spacek SD-1 Minisport with Briggs & Stratton Vanguard 33 hp engine

• Bautek Skycruiser
• Parazoom Trio-Star Delta
• Spacek SD-1 Minisport

Specifications (31 hp model)

Data from Tacke^[1]

General characteristics

• Type: Twin cylinder, four stroke aircraft engine
• Bore: 86 mm (3.4 in)
• Stroke: 78 mm (3.1 in)
• Displacement: 895 cc (54.6 cu in)
• Length: 384 mm (15.1 in)
• Width: 496 mm (19.5 in)
• Height: 725 mm (28.5 in)
• Dry weight: 57 kg (125.7 lb)

Components

• Fuel type: gasoline
• Cooling system: fan-forced air
• Reduction gear: none

Performance

• Power output: 31 hp (23 kW)

See also

Related lists

• List of aircraft engines