Bladed rotor arrangement including axial projection

A bladed rotor arrangement comprising:

• a rotor including a plurality of circumferentially-spaced, axially-extending slots in a periphery of the rotor, the rotor having a first axial end and a second axial end;
• a plurality of rotor blades mounted on the periphery of the rotor, each rotor blade of the plurality of rotor blades including:
• an aerofoil,
• a platform having at least one radially inwardly extending flange,
• a shank, and
• a root disposed in a corresponding axially-extending slot of the plurality of axially-extending slots of the rotor;
• a first seal plate and a second seal plate, the first seal plate being disposed at the first axial end of the rotor and having a projection inserted axially into a secondary slot disposed in a first axial end of the root of a rotor blade of the plurality of rotor blades, the root of the rotor blade of the plurality of rotor blades surrounding each circumferential-facing surface of the inserted projection;
• and
• a plurality of first lock plates disposed at the first axial end of the rotor, each lock plate of the plurality of first lock plates having a radially inner end and a radially outer end, the radially outer end of each first lock plate of the plurality of first lock plates engaging at least one first groove formed by at least one flange of the platforms of the plurality of rotor blades, the radially inner end of each first lock plate of the plurality of first lock plates engaging a circumferentially extending second groove formed by the first seal plate.