The DA 50 EFI MIL SPEC UAV Engine from HFE International is a military-qualified 50 cc engine featuring an electronic fuel injection system in operational use across more than 700 aircraft, with over 67,000 accumulated flight hours worldwide. Tested to 20,000 ft altitude and temperatures from –10 °F to 120 °F, the engine meets the majority of laboratory procedures under MIL-STD-810, ensuring dependable operation in diverse and demanding environments.
Alternator options include a 200 W power management unit (PMU) with outputs of 12–15 VDC at up to 200 W and 4.8–7 VDC at up to 42 W, with an optional 24 V configuration. A 500 W starter-alternator is also available, directly driven from the crankshaft and pairable with a 500 W PMU with integrated starter controller for remote start capability. The PMU provides outputs of 24–28 VDC at up to 350 W, 12–15 VDC at up to 108 W, and 4.8–8 VDC at up to 42 W. All systems are compatible with LiIon, LiPo, LiFePO4, SLA, NiCad, NiMH, and lead acid batteries. Custom alternator configurations are available upon request.
Specifications:
| Power: | 4.5 kW, 6 hp |
| Weight (Engine with Intake): | 1.6 kg, 3.5 lb |
| Weight (ECU): | 70 g, 0.15 lb |
| Weight (Fuel Pump Box) | 400 g, 0.88 lb |
| Standard Operating Speed: | 1,900 to 7,000 RPM |
| Voltage: | 10 V to 15 V |
| Power Draw: | 1 Amp peak, 1 hour/1,000 mAh |
