Aircraft propulsion system with side flowpath inlet(s)

A propulsion system for an aircraft, comprising:

• an open propulsor rotor including a plurality of open propulsor blades arranged circumferentially about a propulsion system axis, each of the plurality of open propulsor blades disposed in an environment external to the propulsion system;
• an engine core configured to drive rotation of the open propulsor rotor about the propulsion system axis, the engine core including a compressor section, a combustor section and a turbine section;
• an engine flowpath including an end flowpath inlet, a side flowpath inlet and a flowpath exhaust, the engine flowpath extending longitudinally through the compressor section, the combustor section and the turbine section from the end flowpath inlet to the flowpath exhaust, and the side flowpath inlet disposed to a radial outer side of the engine flowpath longitudinally between the end flowpath inlet and the compressor section;
• and
• a flow regulator configured to regulate a flow of air from the environment external to the propulsion system into the engine flowpath through the side flowpath inlet;
• wherein the flow regulator comprises a door configured to selectively cover and uncover the side flowpath inlet;
• and
• wherein the door is operatively coupled to a first of the plurality of open propulsor blades.

A propulsion system for an aircraft, comprising:

• an open propulsor rotor including a plurality of open propulsor blades arranged circumferentially about a propulsion system axis, each of the plurality of open propulsor blades disposed in an environment external to the propulsion system;
• an engine core configured to drive rotation of the open propulsor rotor about the propulsion system axis, the engine core including a compressor section, a combustor section and a turbine section;
• an engine flowpath including a flowpath inlet and a flowpath exhaust, the engine flowpath extending longitudinally through the compressor section, the combustor section and the turbine section between the flowpath inlet and the flowpath exhaust;
• and
• a flow regulator configured to
• close the flowpath inlet into the engine flowpath from the environment external to the propulsion system when the open propulsor rotor is configured to provide forward thrust;
• and
• open the flowpath inlet into the engine flowpath from the environment external to the propulsion system when the open propulsor rotor is configured to provide reverse thrust.