Abstract: Disclosed are propulsion systems 30 providing reduced fuel burn, weight and cost. A single gas generator core 38 drives multiple bladed propulsion elements 36 with a power train 48. The core 38 has a forward compressor 56 and a rearward turbine 40 and rotates about a longitudinal core axis 62. The bladed propulsion elements 36 rotate about bladed propulsion element axes 78 that are not coaxial with the core axis 62. The bladed propulsion elements 36 discharge an ambient air stream 50 rearward as a bypass stream 52 portion and a core stream 54 portion. The core stream 54 portion is directed to the compressor 56. The propulsion systems 30 mount inside a fuselage 22 of an airframe 20 or they are suspended beneath a wing 24 via pylons 32.

Abstract: Disclosed are aircraft airframes 20 for providing reduced fuel burn, weight and cost. A fuselage 22 accepts a single gas generator core 38 configured to remotely drive multiple, bladed propulsion elements 36. The propulsion elements 36 may be fans or propellers. An outer cowling 34, extends radially outwardly from the fuselage 22, accepts an ambient air stream 50, and accommodates the bladed propulsion elements 36. The bladed propulsion elements 36 discharge the ambient air stream 50 rearward as a bypass stream 52 portion and a core stream 54 portion. An inlet duct 86 directs the core stream 54 portion into the core 38.

Abstract: Disclosed are propulsion systems 30 providing reduced fuel burn, weight and cost. A single gas generator core 38 drives multiple bladed propulsion elements 36 with a power train 48. The core 38 has a forward compressor 56 and a rearward turbine 40 and rotates about a longitudinal core axis 62. The bladed propulsion elements 36 rotate about bladed propulsion element axes 78 that are not coaxial with the core axis 62. The bladed propulsion elements 36 discharge an ambient air stream 50 rearward as a bypass stream 52 portion and a core stream 54 portion. The core stream 54 portion is directed to the compressor 56. The propulsion systems 30 mount inside a fuselage 22 of an airframe 20 or they are suspended beneath a wing 24 via pylons 32.

Abstract: A method of forming a brush seal which includes placing a bristle hoop sandwiched by a sideplate and a backplate in the cavity of a forming die. The components are then die formed together into a unitized brush seal.

Abstract: A brush seal assembly includes a brush seal having a back plate, a side plate and a plurality of bristles disposed between the back plate and the side plate. A resilient mounting ring includes at least one mounting section for coupling to the brush seal. The mounting ring defines a slot for being received over a projection of a housing to prevent the mounting ring and brush seal to rotate relative to the housing.

Abstract: A brush seal adapted to restrict a fluid flow through a gap between a first component and a second component, comprising: a body; a brush pack secured to the body; and a passage through the body for introducing a cooling flow to said gap. The passage has a first end that is exposed to the gap and a second end that is not exposed to the gap. The passage discharges a cooling flow to the brush seal, the cooling flow being discrete from the fluid flow.

Abstract: A method of making a bristle arrangement for a brush seal, which includes providing a bristle arrangement with the first size but net the second size ; severing the bristle arrangement, the bristle arrangement now having free ends; and joining the free ends. A method of reworking a bristle arrangement for a brush seal, which includes the steps of: providing a bristle arrangement; removing a section from the bristle arrangement; and adding a replacement section to the bristle arrangement.

Abstract: A brush seal assembly which includes a brush seal which is bristle hoop positioned between two plates. A segmented ring is positioned in contact with the brush seal and provides a uniform clamping force against the seal to hold it in place within a support member.

Abstract: A method of forming a brush seal which includes placing a bristle hoop sandwiched by a sideplate and a backplate in the cavity of a forming die. The components are then die formed together into a unitized brush seal.

Abstract: A brush seal including a back plate, side plate and bristle ring is disclosed wherein the brush seal is secured together entirely through the use of removable fasteners. The back plate may be provided with a circumferential lip thereby providing a surface against which the head of a fastener can be used to compress the back plate against the side plate and thus capture the bristle ring therebetween. The brush seal can thereby be manufactured from disparate materials which could not be manufactured if welding were required.

Abstract: A brush seal with: a back plate; a side plate; a first set of bristles; and a second set of bristles between the first set of bristles and the side plate, The second set of bristles have a characteristic, different than the first set of bristles, that reduces windage effects on the first set of bristles. A brush seal for sealing a gap between first and second components, having: a back plate; a side plate; a set of contacting bristles that engages the second component; and a set of non-contacting bristles that extends towards, but does not engage, the second component. The non-contacting bristles reside between the contacting bristles and the side plate. In a brush seal having a set of longer bristles adjacent a set of shorter bristles, wherein the improvement comprises the shorter bristles located on a high pressure side of the longer bristles.