Packard 1A-1500

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The Packard 1A-1500 was a 12 cylinder liquid-cooled 60 degree Vee piston aircraft engine designed in 1924. Test flown in the second prototype Douglas XO-2 it proved to be unreliable, there were 29 built.

[edit] Specifications (Packard 1A-1500)

General characteristics

• Type: 12-cylinder liquid-cooled Vee piston aircraft engine
• Bore: 5 3/8 in (136.5 mm)
• Stroke: 5 1/2 in (140 mm)
• Displacement: 1,498 in³ (24.5 L)
• Dry weight: 720 lb (326.5 kg)

Components

• Valvetrain: Four valves per cylinder, overhead camshaft
• Cooling system: Liquid-cooled

Performance

• Power output: 520 hp (387.8 kW) at 2,200 rpm for takeoff
• Specific power: 0.27 hp/in³ (12.4 kW/L)
• Power-to-weight ratio: 0.53 hp/lb (0.87 kW/kg)

[edit] References

• Aircraft Engine Historical Society

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