Abstract: A system for starting a piston engine, including a crankshaft configured to rotate a shaft of the piston engine, a starter, and a sequence of gimbals including at least one universal joint, the series of gimbals including an input shaft configured to be selectively rotatably connected to the starter, and an output shaft rotatably connected to the crankshaft, the sequence of gimbals carry out a transformation of instantaneous rotational velocity of the output shaft relative to the intake shaft that makes it possible to smooth out resistive torque resulting from the compressions.

Abstract: A heat engine for driving a drive shaft, including at least a gas generator and a turbine, the gas generator supplying the turbine with engine gas and the turbine driving the engine shaft in rotation. The gas generator is a four-stroke internal combustion engine, and includes a compressor for supplying air to the internal combustion engine, the compressor being mechanically driven by the internal combustion engine, and the turbine is mechanically free relative to the internal combustion engine.

Abstract: An oil filtering and distributing device for supplying a first oil pump and a second oil pump of an aircraft engine, the pumps sucking up oil in a common housing, the device including a casing with a lower part and an upper part; a first sleeve coupling for supplying the first pump; a second sleeve coupling for supplying the second pump; the casing including a first compartment receiving oil via a first screen and supplying the first pump with oil via the first sleeve coupling, a second compartment receiving oil via a second screen and supplying the second pump with oil via the second sleeve coupling, an isolator arranged between the first compartment and the second compartment.

Abstract: A cylinder head of an internal combustion engine in which a cooling circuit is arranged, suited for a coolant circulation, includes a peripheral duct surrounding an exhaust valve seat and a peripheral duct surrounding an inlet valve seat communicating by means of a connecting duct; the cylinder head including a first coolant inlet, a second coolant inlet, and an outlet for heated coolant, the second inlet communicating with the connecting duct.

Abstract: An oil filtering and distributing device for supplying a first oil pump and a second oil pump of an aircraft engine, the pumps sucking up oil in a common housing, the device including a casing with a lower part and an upper part; a first sleeve coupling for supplying the first pump; a second sleeve coupling for supplying the second pump; the casing including a first compartment receiving oil via a first screen and supplying the first pump with oil via the first sleeve coupling, a second compartment receiving oil via a second screen and supplying the second pump with oil via the second sleeve coupling, an isolator arranged between the first compartment and the second compartment.

Abstract: A cylinder head of an internal combustion engine in which a cooling circuit is arranged, suited for a coolant circulation, includes a peripheral duct surrounding an exhaust valve seat and a peripheral duct surrounding an inlet valve seat communicating by means of a connecting duct; the cylinder head including a first coolant inlet, a second coolant inlet, and an outlet for heated coolant, the second inlet communicating with the connecting duct.