Orbital Australia Pty Limited

Orbital Austrialia Pty Ltd

Mario Charles Muscat

John Howard Tubb

Pouria Mehrani

Geoffrey Paul Cathcart

Stephen John Karay

David James Caley

Donald Andrew Railton

Callan Murray Bleechmore

Nicholas Coplin

Christian Chandrakumar Zavier

Gavin Warran Dickson

Arminta Chicka

Gary John Bone

Trenton John Harvey

A cylinder liner for providing reduced oil carry-over in an air-assisted fuel injection system comprising an air compression piston wherein the cylinder liner and air compression system together in part define an air compression chamber, the cylinder liner comprising: an outer surface; and a plurality of projections on the outer surface; wherein the plurality of projections are arranged such that oil-laden air drawn up from an oil reservoir around the outer surface of the cylinder liner is forced into a labyrinthine path to increase the time the oil-laden air is in contact with the outer surface and increase the amount of oil adhering to the outer surface to minimize the amount of oil carry-over entering the air compression chamber.

Air compressor cylinder liner

A compact muffler () for an engine exhaust system, which is particularly applicable for use with small, reciprocating piston two-stroke engines of the type used on unmanned aerial vehicles (UAVs). The compact muffler () comprises an exhaust gas flow path () between an inlet () and an outlet (). The exhaust gas flow path () comprises a plurality of adjacent flow passages (), wherein at least two of the adjacent flow passages () are fluidly connected in series to enable the flow of exhaust gas from one to the other along the flow path (). The adjacent flow passages () are configured for fluid flow therealong in opposed directions. A bypass passage () is provided between the two adjacent flow passages () for further communication between the two flow passages and to promote an equalisation of fluid pressure within the two adjacent passages (). A UAV having an internal combustion engine () fitted with an exhaust system comprising the compact muffler () is also disclosed.

Muffler

A dual-fluid injection system for an internal combustion engine, and an unmanned aerial vehicle (UAV) powered by an engine having the dual-fluid injection system. The dual-fluid injection system comprises a liquid fuel metering device and a fluid delivery device operating in tandem. A gas supply system comprising an air compressor and an air delivery path extending between the air compressor and the fluid delivery device is provided to supply pressurised air to the fluid delivery device. The gas supply system comprises an air compressor and an air delivery path extending between the air compressor and the fluid delivery device. A fuel supply system is adapted to deliver liquid fuel to the liquid fuel metering device. A fuel-air regulator is provided for regulating fuel pressure with reference to air pressure to establish and maintain a requisite pressure differential between the fuel pressure and the air pressure. The fuel-air regulator is located remotely from the fluid delivery device and more particularly in close proximity to the air compressor. In a preferred arrangement, the fuel-air regulator is mounted on or integrated with the air compressor or a part thereof.

Fuel-air regulator location

A muffler () devised particularly for use with an engine of the type used on unmanned aerial vehicles (UAVs), and a UAV () having an engine () fitted with the muffler (). The muffler () comprises a body () having an interior chamber (). The muffler body () has a first end section () and a second end section (). The first end section () is adapted for mounting onto the engine () by way of a first mount (), with the interior chamber () in communication with an exhaust outlet of the engine () to receive exhaust flow therefrom. The second end section () is adapted to be mounted by way of a second mount () in a manner resisting movement with respect to the engine (). In one arrangement, the second mount () is configured to yieldingly resist movement with respect to the engine (). In another arrangement, the second mount () is configured to mount the second end section () under a preload resisting movement of the second end section with respect to the engine ().

Muffler for small engines

An unmanned aerial vehicle has an internal combustion engine, and a fuel and lubrication system comprising a fuelling system for fuelling the engine and a lubrication system for delivering lubricating oil to the engine. The fuelling system comprises a fuel reservoir from which fuel can be delivered to the engine. The fuel reservoir comprises a main tank and a header tank. The lubrication system comprises an oil tank. The oil tank is accommodated internally within the main tank to provide an integrated assembly. The arrangement provides for warming of lubrication oil for the UAV engine using several available heat sources. Further, the arrangement facilitates a configuration and layout intended to minimise or negate any undesirable moments of inertia for the UAV during flight as fuel and oil is consumed.

UAV fuel and lubrication system

A muffler devised particularly for a small, reciprocating-piston two-stroke internal combustion engine of the type used on unmanned aerial vehicles. The muffler comprises a body incorporating an inlet, an outlet, and a plurality of chambers for exhaust gas flow from the inlet to the outlet. The body is configured to present a compact profile for installation on the engine. The chambers are so configured that adjacent chambers communicate to facilitate exhaust gas flow from the inlet to the outlet via flow passages. The various chambers comprise an inner chamber, an outer chamber, and one or more intervening chambers disposed between the inner and outer chambers. The various chambers are disposed one about another in annular formation. This arrangement creates a long flow path from the inlet to the outlet incorporating various directional changes.

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Ballajura, Australia

Mario Charles Muscat