L-3/L-4/Gale
Lawrance L-3 aircraft engine on display at the Steven F. Udvar-Hazy Center
Type	Piston aircraft engine
National origin	United States
Manufacturer	Lawrance Aero Engine Company
Designer	Charles Lawrance?
Major applications	Loening M-2

The Lawrance L-3 and L-4 were early aircraft piston engines with three radial cylinders, designed and built by the Lawrance Aero Engine Company in the early 1920s. The L-3 / L-4 series were marketed by the Wright Aeronautical Corporation as the Wright Gale after the acquisition of the Lawrance company.

• Loening M-2
• Naval Aircraft Factory SA^{[citation needed]}
• Sikorsky S-33 Messenger

• Type: 3-cylinder, air-cooled radial piston aircraft engine
• Bore: 4.25 in (108.0 mm)
• Stroke: 5.25 in (133.4 mm)
• Displacement: 223.4 cubic inches (3.7 L)
• Length: 24 inches (610 mm)
• Diameter: 39.0 inches (991 mm)
• Dry weight: 147 pounds (66.7 kg)

• Cooling system: air-cooled

• Power output: 65 horsepower (48 kW) at 2000 rpm

Related lists

• List of aircraft engines

• This article contains material that originally came from the placard at the Steven F. Udvar-Hazy Center, with dimensional error corrected (radius reported as diameter).

• "Lawrance L-3 Radial Engine". Smithsonian National Air and Space Museum. Archived from the original on 2 April 2011. Retrieved 1 January 2011.