Raytheon yesterday cancelled a contract with Teledyne Continental Motors to build the engine for the Tactical Tomahawk cruise missile, saying Teledyne was unable to meet performance goals in time. At the same time, Raytheon said it would switch the contract to Williams International. Teledyne had proposed its J402 turbojet, a modified version of the Harpoon missile engine, to be the Tomahawk's motor. However, "Teledyne has been unable to demonstrate the required performance with the J402 derivative and recently notified Raytheon...