She nods mechanically. "At speeds below Mach 2 the J58 engine functions like a standard jet engine." she says and begins to open up panels on the underside of the nacelle. "Airflow is directed into the multistage axial compressor, mixed with the fuel which is then ignited to engage the turbine. The exhaust is then injected with additional fuel to burn off excess oxygen. At higher speeds bypass tubes open up that siphon compressed air into the afterburner, creating a ramjet engine with the fuel efficiency of a turbojet. At sufficient velocities the engine reaches an equilibrium and most air compression is automatic."
"This means the inlet has to be within certain specifications to the airflow is sufficient and the forces involved don't tear the nacelle from it's manifold. The bypass valves are potential weakpoints as well, though in this design a lot of the welding has been replaced with molecular bonding, enabling higher top-speeds, but the tubes themselves have a tendency to deform after extended use, which causes air-turbulences in the ignition chamber. The fuel-injectors are controlled by magnetic valves and the fuselage is shielded beneath a layer of ablative plating. I disassembled most of it to inspect the fuel-lines to make sure they hadn't been tampered with by the intruders." she says, pointing at parts of the engine that are hidden beneath dull grey metal."
"The exhaust helps direct the thrust to assist with steering and I had to check if it responds to signals correctly, same with the air inlet's central spike since the engine depends on being able to retract it to shape the geometry inside the axial compressor. Most of that is done electronically while I work on the rest of the engine." She stops for a moment and looks up at Aaron. "I would not reccomend doing that unless you are very familiar with the design as you would risk injuring yourself when the interior engine components move." As if to demonstrate parts of the engine begin to shift as the
exhaust nozzle moves around.