Hybrid Electric Gen Sets: LaunchPoint has developed Gen Sets based on reciprocating engines for hybrid electric UAV systems. Reciprocating engines have much higher efficiency than turbine engines and, when coupled with our gen sets, represent a significant performance increase over existing hybrid power systems. For mission durations above one to two hours the reduced fuel payload required for an efficient reciprocating engine can make the combined fuel and engine mass lower for a reciprocating gen set than a turbine-based gen set.