Abstract: A gas turbine engine and its associated air intake system in which the air intake system comprises a generally horizontally extending duct through which an airflow is induced by an ejector pump powered by the engine. A portion of the air passing through the duct is directed through a second duct to the air inlet of the engine. The second duct is connected to the first duct in such a manner that the air directed to the engine air inlet is derived from a vertically upper region of the first duct. The arrangement is intended to reduce the amount of airborne particulate material ingested by the gas turbine engine.

Abstract: An oil tank suitable for an aircraft mounted gas turbine engine is divided into three series connected chambers. Aerated oil after engine use is fed into the first chamber and de-aerated oil withdrawn from the third chamber for engine use. The chambers are interconnected in such a manner that when the tank is inverted, a reservoir of oil is retained within the third chamber to provide a continued supply of oil to the oil outlet for a finite time period and insufficient oil flows into the first chamber from the second to obstruct an air vent provided in the first chamber.

Abstract: A sickle guard having at least one longitudinally extending guard finger for use in a mower having sickle means including mounting means for supporting flat cutter sections for movement transversely of the guard finger, wherein the guard finger has a bottom body portion having an upper ledger surface lying in a horizontal plane and have cutting edges at each of the sides thereof, trash bar means extending transversely at the rear of the cutting edges of the ledger surface and in which the trash bar means has upper horizontal surface means lying in the horizontal plane of the ledger surfce of the guard finger and having cutting edge means at the forward end thereof, and in which the ledger surface and the upper surface of the trash bar means provide for supporting the cutter sections of the sickle means for movement with respect to the guard finger and in cutting relation to the cutting edges of the ledger surface and the cutting edge means of the trash bar means.