Abstract: The invention relates to an airfield light comprising a body, a medium intensity lighting arrangement, and a high intensity lighting arrangement. The medium intensity lighting arrangement provides an omnidirectional light source, and the high intensity lighting arrangement provides a unidirectional or bidirectional light source. The invention is energy efficient compared to conventional airfield lights, and has particular application to temporary airfields. LEDs may be used as the light sources.

Abstract: A weather sensing system mountable on a tubular member. The weather sensing system includes a weather sensor housing including removably attached first and second housing portions. The first housing portion includes a first open channel and the second housing portion including a second open channel aligned with and opening toward the first open channel. The first and second open channels form an enclosed channel for receiving and fixing the weather sensing system to the tubular member.

Abstract: A multi-function sensor system comprises a dual-axis electromagnetic speed sensor and a depth transducer to enable various underwater or marine measurements to be achieved in a single unit thus reducing the space required on a vessel and the cost of having such multiple functions.

Abstract: An ultrasonic anemometer (7) as well as a method for determination of at least one component of a wind velocity vector and/or a velocity of sound includes at least one sound transducer at least temporarily working as a transmitter (1, 2, 3, 4, 5, 6, 15, 16) with a sound emission surface for emitting sound waves and at least one sound transducer at least temporarily working as a receiver (1, 2, 3, 4, 5, 6, 15, 16) with a sound detection surface for at least partially receiving the emitted sound waves. An evaluation unit, determines at least one component of a wind velocity vector and/or the velocity of sound, based on a recorded transit time, which the sound waves require on a measuring section located between the sound emission surface of the at least one transmittor and the sound detection surface of the at least one receiver to cover the distance of this measuring section.

Abstract: Embodiments of air flow sensing systems are provided herein. In some embodiments, one or more sensors are positionable on an aircraft and dimensioned and arranged to measure vector components of airflow velocity having at least one of a transverse or streamwise direction relative to a flight direction of the aircraft. In some embodiments, the one or more sensors are positioned in front of an aircraft wing and distributed as an array of sensors along the span of the aircraft wing.

Abstract: A weathervane includes a vane and a wind direction display roller. Driven by wind force, the vane rotates the display roller through a motion transfer system. The display roller includes a plurality of wind direction indicators. The weathervane further includes a housing that receives the display roller. The housing includes an opening through which one or more direction indicators are visible.

Abstract: A system for monitoring the quality of maintenance performed on a wind turbine. A restoration factor is used to determine the quality of maintenance performed of the wind turbine. A restoration factor determined after a scheduled maintenance is compared to historical and comparative references to determine the quality of the maintenance performed on the wind turbine. Based upon these comparisons, maintenance of the wind turbine may be modified to increase the capacity of the wind turbine.

Abstract: Wind indicator apparatus for indicating air flow comprising: a direction pointer, including a vane member, for providing a visible indication of air flow direction; pivoting means including a fixed portion for coupling to a sailing craft and a pivotable portion able to pivot with respect to said fixed portion and with which said direction pointer is entrained for movement therewith; and a counterbalance extending from said pivotable portion of said pivoting means and arranged to move therewith, the mass of the counterbalance being disposed so as to maintain the direction pointer in a substantially level position.

Abstract: An apparatus for measuring fluid velocity includes a generally Y-shaped yoke including a base and first and second forks, the first and second forks including through holes at ends thereof; a bucket wheel supported between the first and second forks of the yoke; a first shaft that passes through the through hole in the first fork and supports one side of the bucket wheel; a second shaft that passes through the through hole in the second fork and supports the other side of the bucket wheel, the second shaft rotating with the bucket wheel and including a magnet mounted therein; the second fork of the yoke including an opening for receiving a reed switch assembly, the opening communicating with the through hole in the second fork, the magnet on the second shaft being aligned with the opening whereby when the second shaft rotates the magnet passes by the opening; and a reed switch assembly mounted in the opening in the second fork of the yoke.

Abstract: Weather vanes (1) are delicate instruments partially exposed to external conditions. They are used in particular in the aeronautical industry. The measurements provided by these weather vanes are crucial to the flying of an aircraft. A type of weather vane is proposed in which a vane can be changed. Changing the vane entails adjusting the orientation sensors (3). To perform this adjustment, use is made of a factory setting rig (16) that allows the various parts of the weather vane to be placed in a characteristic position.