Packard Liberty L-8
Liberty L-8 - the first one built
The Liberty L-8, aka Packard 1A-1100 engine was a prototype of the Liberty L-12 engine, designed by Jesse G. Vincent and Elbert J. Hall, and manufactured by Packard Motor Car Company in Detroit, Michigan around 1917. Although it did not see mass production several were built. The first of them built now resides in the National Air and Space Museum in Washington, DC.
Type: 8-cylinder, liquid-cooled Vee aircraft piston engine
Bore: 5 in (127 mm)
Stroke: 7 in (178 mm)
Displacement: 1,099.6 cubic inches (18.0 lt)
Length: 57 inches (1,448 mm)
Dry weight: 575 pounds (260.8 kg)
Valvetrain: One intake and one exhaust valves per cylinder actuated via a single overhead camshaft per cylinder bank.
Cooling system: Liquid-cooled
Power output: 290 hp (216 kW) at 1,700 rpm
Specific power: 0.26 hp/cu.in (11.9 kW/lt)
Power-to-weight ratio: 0.45 hp/lb (0.74 kW/kg)