A COMPOSITE fan-inlet case for the Pratt & Whitney F119 fighter engine has been developed by Dow-United Technologies Composite Products (Dow-UT). The one-piece component, produced by resin-transfer moulding, is lighter and cheaper than the current fabricated-titanium case, says Wallingford, Connecticut-based Dow-UT.
The fan-inlet case is the structural frame which supports the forward bearing and consists of an inner bearing hub, multiple aerofoil-shaped struts and an outer support ring. The case, moulded to the final dimensions and with smooth external surfaces, weighs almost 7kg less than the titanium version, which has to be assembled and then machined to the final tolerances.
The composite fan-inlet case is being evaluated for use on F119 derivatives being developed to power the Joint Strike Fighter.
Source: Flight International
