Variable volume combustion chamber for a gas turbine engine

A variable combustion chamber having an exit end for a gas turbine engine operable between idle and full power settings comprising:

• a) a first, fixed wall defining at least one intake orifice adapted to allow an oxidizer to pass into the combustion chamber;
• b) a movable second wall located such that the first and second walls bound the combustion chamber;
• c) means to move the second wall relative to the first wall between a first position in which the volume of the combustion chamber is at a maximum when the gas turbine engine operates at an idle power setting and a second position in which the volume of the combustion chamber is at a minimum when the gas turbine operates at a full power setting;
• d) a shutter operatively associated with the second, movable wall such that it moves with the second wall between a first shutter position wherein the shutter at least partially blocks the at least one intake orifice so as to restrict the passage of oxidizer therethrough, and a second shutter position wherein the at least one intake orifice is unobstructed;
• and,
• e) a plurality of relatively movable, telescoping collar segments operatively associated with the second wall and located adjacent to the exit end of the combustion chamber.