Powerplant
Two Pratt & Whitney Canada PW615F turbofan engines are installed on the Mustang, one on each side of the rear fuselage in easily accessible nacelles. This engine is a 2.8 to one bypass ratio, counter-rotating twin-spool design with 3 compression stages and 2 turbine stages. It produces 1,460 pounds (6.49 kN) of thrust at sea level static conditions, flat rated up to 77°F (25°C). A forced exhaust mixer improves fuel burn and reduces noise. Expected intervals for major maintenance are 1,750 hours for HSI and 3,500 hours for overhaul. Engine indications are shown on the multi-function display
Two dual channel Full Authority Digital Engine Controls (FADECs), located in the tailcone, provide automation and efficiency in thrust management. Throttle lever angle signals are sent to the FADECs to indicate the demanded thrust. Detents in the throttle quadrant (takeoff, climb, cruise, and idle stops) give pilots the optimal power settings for each phase of flight based on ambient conditions. Note: Installed in each throttle handle are a speed brake switch and a takeoff/go-around button.
The FADEC system also provides time-limited dispatch (TLD), engine synchronization according to switch position, an auto-relight function, and limited diagnostics as indicated on the multi-function display (MFD). Extensive engine diagnostic capability is available with specialized maintenance equipment. Electrical power for the FADECs comes from engine driven permanent magnet alternators (PMAs) rectified to DC, or normal aircraft voltage. If normal aircraft DC power is lost, the PMAs ensure the FADECs remain powered. The PW615F engine incorporates a modular design and multiple borescope locations for easier maintenance and inspections. A continuous loop fire detection system monitors the nacelle area to detect and warn if a fire occurs. A single-shot fire extinguishing system using Halon is provided in the tailcone area.
