Abstract: An aircraft 10 includes a pair of aerodynamic control members 11 pivotally mounted one to each side of the cockpit, each for movement about a pivotal axis P. A probe 13 is carried adjacent the outboard end of each control member in a predetermined orientation by fixed support means 25 anchored to the aircraft body and extending through the aerodynamic control member 11 adjacent the pivotal axis P. By this arrangement, the probe 13 remains in its predetermined orientation with respect to the aircraft irrespective of the angular disposition of the control member. The probe may be an air-data probe.

Abstract: A low chloride extinguishing agent for combustible metal fires comprising from substantially 75 to substantially 94 weight percent of sodium carbonate as the basic fire extinguishing material, from substantially 1 to substantially 5 weight percent of a water-repellent agent such as a metal stearate, from substantially 2 to substantially 10 weight percent of a flow promoting agent such as attapulgus clay, and from substantially 3 to substantially 15 weight percent of a polyamide resin as a crusting agent.