Abstract: A method of assembling parts of an aircraft engine, the method includes: forming, at a first temperature, a pre-assembly of a first part of the aircraft engine and a second part of the aircraft engine by aligning the first part and the second part such as to be engageable within one another, the second part having a coefficient of thermal expansion that is greater than a coefficient of thermal expansion of the first part; heating the pre-assembly to a second temperature greater than the first temperature to expand the second part relative to the first part; and compressing the pre-assembly until the first part is inserted into the second part to create a contact interface between the first part and the second part.

Abstract: A housing assembly for a rotary engine, has: a rotor housing extending around an axis, the rotor housing having an inner face facing a rotor cavity; side housings secured to opposite sides of the rotor housing, the rotor cavity bounded axially between the side housings; and a seal received within a groove at an interface between the rotor housing and a first side housing, the groove annularly extending around the axis, located outwardly of the inner face, and overlapping a peripheral section of the first side housing, the seal having: an elastomeric member compressed between the peripheral section and the rotor housing; and a shield disposed inwardly of the elastomeric member, the shield having a melting point above a temperature of combustion gases, the shield in contact with both of the peripheral section of the first side housing and the rotor housing.

Abstract: A method of assembling parts of an aircraft engine, the method includes: forming, at a first temperature, a pre-assembly of a first part of the aircraft engine and a second part of the aircraft engine by aligning the first part and the second part such as to be engageable within one another, the second part having a coefficient of thermal expansion that is greater than a coefficient of thermal expansion of the first part; heating the pre-assembly to a second temperature greater than the first temperature to expand the second part relative to the first part; and compressing the pre-assembly until the first part is inserted into the second part to create a contact interface between the first part and the second part.

Abstract: An engine housing includes a rotor housing body, a side housing body a side plate and a seal assembly. The rotor housing body extends about an axis to form a rotor cavity. The rotor housing body extends between and to a first axial end and a second axial end. The side housing body is disposed at the first axial end. The side plate includes an inner side, an outer side, and a perimeter edge extending from the inner side to the outer side. The seal assembly includes a support ring and a spacer. The support ring and the spacer extend about the axis. The support ring is mounted to the perimeter edge by a braze joint. The spacer extends between and to a first axial spacer end and a second axial spacer end. The first axial spacer end is disposed at the support ring and the outer side.

Abstract: A socket assembly for rotating a nut, the nut having an annular body with a radially inner edge defining a torque transferring surface, the socket assembly has: an intermediate socket extending axially relative to a central axis between a proximal end and a distal end, the proximal end of the intermediate socket engageable by a tool for rotating the intermediate socket about the central axis; and socket segments detachably connected to the intermediate socket in a circumferential array about the central axis, a socket segment of the socket segments having a nut-engaging end projecting radially outwardly relative to the distal end of the intermediate socket and engageable with the torque transferring surface of the nut to transfer a torque from the intermediate socket to the nut via the socket segments.

Abstract: An engine housing for an aircraft rotary engine includes a rotor housing and a side housing assembly. The rotor housing includes a rotor housing body. The rotor housing body extends about an axis to form a rotor cavity of the engine housing. The rotor housing body extends between and to a first axial end and a second axial end. The side housing assembly includes a side housing body, a side plate, and a seal assembly. The side housing body is disposed at the first axial end. The side plate includes an inner side, an outer side, and a perimeter edge extending from the inner side to the outer side. The seal assembly includes a support ring and a spacer. The support ring and the spacer extend about the axis. The support ring is mounted to the perimeter edge by a braze joint. The spacer extends between and to a first axial spacer end and a second axial spacer end. The first axial spacer end is disposed at the support ring and the outer side.

Abstract: A socket assembly for rotating a nut, the nut having an annular body with a radially inner edge defining a torque transferring surface, the socket assembly has: an intermediate socket extending axially relative to a central axis between a proximal end and a distal end, the proximal end of the intermediate socket engageable by a tool for rotating the intermediate socket about the central axis; and socket segments detachably connected to the intermediate socket in a circumferential array about the central axis, a socket segment of the socket segments having a nut-engaging end projecting radially outwardly relative to the distal end of the intermediate socket and engageable with the torque transferring surface of the nut to transfer a torque from the intermediate socket to the nut via the socket segments.

Abstract: During a manufacturing method, a protective coating is applied to a first chamber surface of a first component to provide a coated first chamber surface. The protective coating is applied to a second chamber surface of a second component to provide a coated second chamber surface. The second component is configured with the first component to provide a pilot chamber structure. The pilot chamber structure includes a pilot chamber, a pilot aperture, a fuel aperture and an ignitor aperture. The pilot chamber is formed by the coated first chamber surface and the coated second chamber surface within the pilot chamber structure. The pilot aperture projects into the first component from a distal end of the pilot chamber structure to the pilot chamber. The fuel aperture projects into the pilot chamber structure to the pilot chamber. The ignitor aperture projects into the pilot chamber structure to the pilot chamber.

Abstract: A rotary internal combustion engine includes a rotor housing having a peripheral wall circumscribing a rotor cavity and a rotor disposed within the rotor cavity. A side housing is secured to the rotor housing and a plate defines a seal running surface for the rotor. The plate is disposed between a portion of the side housing and the rotor housing and at least one shim is disposed between the plate and the side housing for spacing the plate apart from contact with the side housing.

Abstract: An assembly is provided for a powerplant. This assembly includes a housing, a primary fuel injector and an ignition system. The housing forms a combustion volume within the housing. The primary fuel injector is configured to inject primary fuel into the combustion volume. The ignition system is configured to ignite the primary fuel within the combustion volume. The ignition system includes a pilot fuel injector, a pilot ignitor, a pilot chamber, a first component and a second component. The pilot fuel injector is configured to inject pilot fuel into the pilot chamber. The pilot ignitor is configured to ignite the pilot fuel within the pilot chamber. The pilot chamber is fluidly coupled with the combustion volume through an aperture in the first component. The pilot chamber is formed by and disposed between the first component and the second component. The first component is configured from or otherwise include a ceramic.

Abstract: An assembly is provided for a powerplant. This assembly includes a housing, a primary fuel injector and an ignition system. The housing forms a combustion volume within the housing. The primary fuel injector is configured to inject primary fuel into the combustion volume. The ignition system is configured to ignite the primary fuel within the combustion volume. The ignition system includes a pilot fuel injector, a pilot ignitor, a pilot chamber, a first component and a second component. The pilot fuel injector is configured to inject pilot fuel into the pilot chamber. The pilot ignitor is configured to ignite the pilot fuel within the pilot chamber. The pilot chamber is fluidly coupled with the combustion volume through an aperture in the first component. The pilot chamber is formed by and disposed between the first component and the second component. The first component is configured from or otherwise include a ceramic.

Abstract: An engine housing includes a rotor housing and a side housing assembly. The rotor housing includes a rotor housing body. The rotor housing body extends about an axis to form a rotor cavity of the engine housing. The rotor housing body extends between and to a first axial end and a second axial end. The side housing assembly includes a side housing body, a side plate, and a seal assembly. The side housing body is disposed at the first axial end. The side plate is disposed axially between the rotor housing body and the side housing body. The side plate includes an inner side, an outer side, and a perimeter edge. The seal assembly includes a support ring and a sealing ring. The support ring is disposed at the perimeter edge and the first axial end. The support ring circumscribes the side plate. The sealing ring extends between and to a first axial sealing ring end and a second axial sealing ring end. The first axial sealing ring end is disposed at the support ring and the outer side.

Abstract: A side housing for a rotary internal combustion engine, has: a side wall defining first threads, the first threads extending around a central axis; a side plate having a rotor-engaging side facing away from the side wall and a back side opposite the rotor-engaging side and facing the side wall; and a nut rotatable relative to the side plate about the central axis, the nut and the side plate axially locked to one another, the nut defining second threads extending around the central axis, the side plate secured to the side wall via a threading engagement between the first threads of the side wall and the second threads of the nut.

Abstract: A rotary internal combustion engine is provided that includes a housing and a rotor. The housing includes first and second side housings and a center housing. The center housing is disposed between and attached to the first and second side housings. The rotor is disposed within a rotor chamber and is engaged with a rotor shaft that extends between the first and second side housings. The rotor has a peripheral side wall that extends between a pair of end face surfaces. At least one of the first side housing or the second side housing includes a side plate having a seal surface, an interior surface, and a core disposed between the seal surface and the interior surface. The core comprises a ceramic matrix composite (CMC) material. The seal surface of the side plate engages in a sealing arrangement with a respective rotor end face surface.

Abstract: A housing assembly for a rotary engine, has: a rotor housing extending around an axis, the rotor housing having an inner face facing a rotor cavity; side housings secured to opposite sides of the rotor housing, the rotor cavity bounded axially between the side housings; and a seal received within a groove at an interface between the rotor housing and a first side housing, the groove annularly extending around the axis, located outwardly of the inner face, and overlapping a peripheral section of the first side housing, the seal having: an elastomeric member compressed between the peripheral section and the rotor housing; and a shield disposed inwardly of the elastomeric member, the shield having a melting point above a temperature of combustion gases, the shield in contact with both of the peripheral section of the first side housing and the rotor housing.

Abstract: A rotary internal combustion engine includes a rotor housing having a peripheral wall circumscribing a rotor cavity and a rotor disposed within the rotor cavity. A side housing is secured to the rotor housing and a plate defines a seal running surface for the rotor. The plate is disposed between a portion of the side housing and the rotor housing and at least one shim is disposed between the plate and the side housing for spacing the plate apart from contact with the side housing.

Abstract: A socket assembly for rotating a nut, the nut having an annular body with a radially inner edge defining a torque transferring surface, the socket assembly has: an intermediate socket extending axially relative to a central axis between a proximal end and a distal end, the proximal end of the intermediate socket engageable by a tool for rotating the intermediate socket about the central axis; and socket segments detachably connected to the intermediate socket in a circumferential array about the central axis, a socket segment of the socket segments having a nut-engaging end projecting radially outwardly relative to the distal end of the intermediate socket and engageable with the torque transferring surface of the nut to transfer a torque from the intermediate socket to the nut via the socket segments.

Abstract: A side housing for a rotary internal combustion engine, has: a side wall; a side plate having a rotor-engaging side facing away from the side wall and a back side opposite the rotor-engaging side and facing the side wall, the side plate defining first threads located on the back side, the first threads extending circumferentially around a central axis of the side plate; and a nut rotatable relative to the side wall about the central axis of the side plate and axially locked to the side wall relative to the central axis, the side plate secured to the side wall via a threaded engagement between the first threads of the side plate and second threads defined by the nut.

Abstract: A multi-engine aircraft includes a first engine drivingly engaged to a common rotatable load and a second engine drivingly engaged to the common rotatable load, the second engine having a bleed air system and a control system in communication with a compressed air switching system. The control system controls operation of the second engine and/or the compressed air switching system. The compressed air switching system includes a switching valve that is displaceable between at least a first position and a second position, the first position interconnecting a lower pressure inlet and a switch outlet, and the second position interconnecting a high pressure inlet and the switch outlet. The switch outlet is in communication with the bleed air system of the second engine. The control system actuates the switching valve to switch between the first and second positions.

Abstract: A rotary internal combustion engine has: a rotor; a housing circumscribing a rotor cavity, the rotor received within the rotor cavity, the housing having a peripheral wall and a side housing assembly secured to the peripheral wall, the side housing assembly having plates located at spaced apart ends of the peripheral wall, the plates defining seal running surfaces in sealing engagement with opposed end faces of the rotor, the plates made of silicon carbide.