Abstract: Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Abstract: A timely component movement measuring system for a vehicle is disclosed. The system includes a component of a vehicle, the component having a range of motion. The system also includes a sensor to measure a movement of the component through some or all of the range of motion of the component.

Abstract: Disclosed herein is a threaded bottom bracket comprising: an internal sleeve, a ball bearing, wherein an inner race of the ball bearing is an extended inner race, a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve, a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path, and a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race.

Abstract: Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Abstract: Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Abstract: An annular combustion chamber wall arrangement includes an annular wall and a plurality of tiles and each tile is secured to and is spaced from a further annular wall. The first surface of each tile faces the annular wall and the second surface of each tile faces away from the annular wall. Each tile has a plurality of pedestals extending away from the first surface towards the annular wall and/or a plurality of effusion cooling apertures extending through the tile from the first surface to the second surface. At least one of the tiles has the pedestals and/or the effusion cooling apertures arranged in a predetermined pattern which provides the tile with a more uniform stiffness in all directions to reduce the possibility of cracking of the tile. In one predetermined pattern the pedestals are arranged in a Fermat's (parabolic) spiral with the pedestals arranged with Fibonacci number ordering.

Abstract: Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Abstract: Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Abstract: An annular combustion chamber wall arrangement includes an annular wall and a plurality of tiles and each tile is secured to and is spaced from a further annular wall. The first surface of each tile faces the annular wall and the second surface of each tile faces away from the annular wall. Each tile has a plurality of pedestals extending away from the first surface towards the annular wall and/or a plurality of effusion cooling apertures extending through the tile from the first surface to the second surface. At least one of the tiles has the pedestals and/or the effusion cooling apertures arranged in a predetermined pattern which provides the tile with a more uniform stiffness in all directions to reduce the possibility of cracking of the tile. In one predetermined pattern the pedestals are arranged in a Fermat's (parabolic) spiral with the pedestals arranged with Fibonacci number ordering.