Abstract: A pattern representing the airfoil section of a stator vane is located on a supporting block adapted to be received in a casting fixture. A locating block is also provided in the casting fixture in spaced relation to the airfoil pattern on the supporting block. The angle of the airfoil pattern is adjusted within the casting fixture chamber relative to the locating block. A fixed mold is adapted to mate with the mold formed in the adjustable cast fixture and the two molds are placed on a lathe by means of the locating block set in one of the molds so that the surfaces for receiving the inner and outer shroud mold cavities can be formed. The molds are then matched with the inner and outer shroud cavities, and the wax or plastic pattern material is injected into the so-formed mold cavity for forming the investment pattern. When it is necessary to produce a new vane casting with modified stagger angle, it is necessary to re-orient the half airfoil pattern in the casting fixture relative to the locating block.

Abstract: The invention relates to an improvement to an installation for preventing the ingress of super-cooled water, ice, snow and other debris as taught in U.S. Pat. No. 3,329,377. In the patent, an inertial separator effect is used to prevent ingress of super cooled water, ice, snow and other debris to an aircraft engine. The effect is obtained by an installation including a duct formed in a sub-nacelle of the engine to extend generally longitudinally of the engine. An air deflecting surface in the duct confines the incoming air to a passage of reduced cross section, and an opening in the duct wall downstream of the deflecting surface is formed between the trailing edge of the deflecting surface and the leading edge of a rearward portion of the duct, the opening in the duct wall communicating with the engine air intake. In accordance with the present invention, any or all of the following improvements are made to the above installation:A.

Abstract: A continuous combustion device of the type having a combustion chamber and an outer casing forming with it an annular air delivery passage for distributing a continuous supply of compressed air into the combustion chamber, and a fuel injector at one end of the combustion chamber. The combustion chamber has a pattern of holes connecting the air passage with primary and secondary combustion zones within it. The invention provides adjustable means for controlling the flow of delivery air in the annular passage to proportion the relative air distribution to the primary and secondary zones so as to reduce polluting emissions under varying load conditions. Preferably, the hole pattern is designed to provide a lean primary zone fuel-air ratio at full power conditions and early quenching of the flame in the primary zone. The regulating device may take the form of adjustable baffle means and for proportioning the distribution of the flow of air in the annular passage.