Unmanned Systems Technology 008 | Alti Transition UAS | Ground control systems | Xponential 2016 report | Insitu Orbital N20 | UAVs | Solar power | Oceanology International 2016 report

65 Insitu N20 UAV 50 cc two-stroke single | Dossier Unmanned Systems Technology | June/July 2016 and four fasteners secure the assembly to the head. The spark plug is M10 with a remote coil controlled by the ECU, as are the injector solenoids. Key inputs to the ECU are crankshaft position (the detail of which sensor is undisclosed), throttle position, atmospheric pressure and temperature, and cylinder head temperature. The ECU also talks to the PSU and the craft’s control unit. The engine mounts are formed integrally with the crankcase in the form of a pair of ears on each side. Those four points allow the engine to be attached to the airframe via vibration-absorbing isolators. MIL-Spec fasteners are used throughout, as are MIL-Spec electrical connectors, which are EMI-shielded. The engine core weighs 1.6 kg, and the complete engine 2.7 kg. That includes the exhaust, cooling duct, cover and mounts but not off-engine items (engine management box, ignition coils and fuel and oil tank/pumps). The engine is topped by a carbon fibre cooling duct under an optional carbon fibre top cover, the latter being designed to form part of the fuselage streamlining. Some key suppliers to the N20 Main structure: undisclosed Bore coating: undisclosed Crankshaft: undisclosed Piston: undisclosed Con rod: undisclosed Big-end bearings: Koyo Main bearings: SKF Small-end bearings: INA Seals: SKF Fasteners: Aircraft Spruce Ignition: Orbital Spark plug: NGK Fuel injector: Orbital Engine management system: Orbital Throttle actuation servo: Volz Oil pump: undisclosed Oil filter: Orbital Generator: Sullivan Power supply unit: Sullivan Fluid lines: Goodrich Fluid couplings: Battlefield Fuel pump: Flightworks Dynos: Schenck Components of the Insitu/Orbital N20