Abstract: An exhaust system for an aircraft includes an exhaust duct configured to be inserted within a plurality of leaf springs of an aircraft. The exhaust duct is configured to be in fluid communication with the auxiliary power unit for conveying exhaust from the auxiliary power unit to an exhaust exit, the exhaust duct including at least one exhaust bracket for movably mounting the exhaust duct to an airframe. An alignment system is configured to be operatively connected to the exhaust duct.

Abstract: An exhaust system for an aircraft includes an exhaust duct configured to be inserted within a plurality of leaf springs of an aircraft. The exhaust duct is configured to be in fluid communication with the auxiliary power unit for conveying exhaust from the auxiliary power unit to an exhaust exit, the exhaust duct including at least one exhaust bracket for movably mounting the exhaust duct to an airframe. An alignment system is configured to be operatively connected to the exhaust duct.

Abstract: An assembly includes a reservoir, a first sensor, a second sensor, and a controller. The first and second sensors are positioned in the reservoir. The controller is connected to both the first and second sensors. The controller sends a full signal when the first sensor indicates that liquid level in the reservoir is at or above a first level. The controller sends a fill signal when the second sensor indicates that liquid level in the sump is at or below a second level. The controller sends an approximate oil level signal with a value estimated based upon elapsed operating time since the reservoir was at or above the first level.

Abstract: An assembly includes a reservoir, a first sensor, a second sensor, and a controller. The first and second sensors are positioned in the reservoir. The controller is connected to both the first and second sensors. The controller sends a full signal when the first sensor indicates that liquid level in the reservoir is at or above a first level. The controller sends a fill signal when the second sensor indicates that liquid level in the sump is at or below a second level. The controller sends an approximate oil level signal with a value estimated based upon elapsed operating time since the reservoir was at or above the first level.

Abstract: A method of adjusting a hinged linkage that has at least one linear actuator coupled to it, wherein one end of the actuator couples to the linkage and another end fastens to a stationary mounting by way of a rod with a threaded end that mates with a threaded aperture in a ferrule nut that has a threaded section passing through an aperture in the stationary mounting, comprises the steps of: extending the actuator to open the linkage; placing at least one elastic element with a desired force constant over the threaded section of the ferrule nut; threading an adjustment nut onto the threaded section of the ferrule nut with a desired gap between the adjustment nut and the stationary mounting; retracting the actuator to close the linkage; and rotating the adjustment nut and the ferrule nut together to compress the elastic element against the stationary mounting; extending the actuator to open the linkage; and rotating the adjustment nut to compress the elastic element against the stationary mounting.

Abstract: A method of adjusting a hinged linkage that has at least one linear actuator coupled to it, wherein one end of the actuator couples to the linkage and another end fastens to a stationary mounting by way of a rod with a threaded end that mates with a threaded aperture in a ferrule nut that has a threaded section passing through an aperture in the stationary mounting, comprises the steps of: extending the actuator to open the linkage; placing at least one elastic element with a desired force constant over the threaded section of the ferrule nut; threading an adjustment nut onto the threaded section of the ferrule nut with a desired gap between the adjustment nut and the stationary mounting; retracting the actuator to close the linkage; and rotating the adjustment nut and the ferrule nut together to compress the elastic element against the stationary mounting; extending the actuator to open the linkage; and rotating the adjustment nut to compress the elastic element against the stationary mounting.