DEL-120
Lycoming DEL-120 on MQ-1C Gray Eagle
Type	Military Aircraft diesel engine
National origin	United States
Manufacturer	Lycoming Engines
Major applications	General Atomics MQ-1C Gray Eagle
Produced	2013-present

The Lycoming DEL-120 is an aircraft diesel engine produced by Lycoming Engines using automotive technology and initially powering unmanned aircraft.^[1] Because the DEL-120 is a non-certified engine and is meant for military use only, there is no civil application of this engine.

Applications

• General Atomics Improved MQ-1C Gray Eagle

Specifications

Data from Lycoming^[2]

General characteristics

• Type: four stroke, four cylinder compression-ignition
• Bore: 3.2 in (82 mm)
• Stroke: 3.6 in (90.4 mm)
• Displacement: 1,910 cm³ (117 cu in)
• Dry weight: 360 lb (160 kg) dry
• Designer: FIAT via DieselJet^[3]

Components

• Turbocharger: air-to-air intercooler
• Fuel type: JET A/A1, JP-8, F-24
• Cooling system: liquid, with expansion tank
• Reduction gear: 0.553
• FADEC

Performance

• Power output: Take-Off: 205 hp (153 kW), Max Continuous (90%): 180 hp (134 kW), both at 2101 propeller RPM
• Specific power: 1.206 hp/cu in (54.9 kW/L)
• Compression ratio: 16.5:1
• Fuel consumption: 64.8 lb/h (29.4 kg/h) at Max Continuous
• Specific fuel consumption: 0.36 lb/(hp⋅h) (220 g/kWh) at Max Continuous, 0.345 lb/(hp⋅h) (210 g/kWh) in Cruise (60% PLA, 1770 propeller RPM)
• Power-to-weight ratio: 0.57 hp/lb (0.94 kW/kg)