Gas turbine engine

Claim 1

A GAS TURBINE ENGINE HAVING AN AIR INTAKE COMPRISING AN AIR INTAKE CASING, AND A NOSE BULLET LOCATED CENTRALLY OF THE AIR INTAKE CASING AND DEFINIG AN AIR INTAKE PASSAGEWAY THEREWITH, SAID AIR INTAKE HAVING SURFACES ON WHICH ICE MAY FORM, A STARTER TURBINE LOCATED IN SAID NOSE BULLET FOR EFFECTING STARTING OF THE ENGINE, A SOURCE OF MOTIVE FLUID FOR THE STARTER TURBINE, A SEPARATE SOURCE OF HEATED AIR, AT LEAST ONE DUCT WHICH EXTENDS BETWEEN SAID AIR INTAKE CASING AND SAID NOSE BULLET, MEANS FOR CONNECTING SAID AT LEAST ONE DUCT AT THE END THEREOF IN SAID AIR INTAKE CASING SELECTIVELY TO SAID MOTIVE FLUID SOURCE AND TO SAID HEATED AIR SOURCE, HEATING DUCT MEANS IN HEAT EXCHANGE RELATIONSHIP WITH SAID SURFACES OF THE AIR INTAKE, SAID HEATING DUCT MEANS AND SAID STARTER TURBINE BEING SEPARATE FROM ONE ANOTHER AND BOTH BEING IN COMMON COMMUNICATION WITH SAID AT LEAST ONE DUCT AT THE END THEREOF IN SAID NOSE BULLET, FIRST CLOSURE MEANS ASSOCIATED WITH SAID STARTER TURBINE FOR SELECTIVELY CLOSING AND OPENING THE STARTER TURBINE TO FLUID FLOW THERETHROUGH, AND SECOND CLOSURE MEANS ASSOCIATED WITH SAID HEATING DUCT MEANS FOR SELECTIVELY CLOSING AND OPENING THE HEATING DUCT MEANS TO FLUID FLOW THERETHROUGH TO THE ATMOSPHERE.