Electrical System

  • The electrical system provides 28-volt DC power through two engine-driven 300-amp starter-generators operating in a parallel bus configuration. A 30-amp-hour battery supplies power for engine start and serves as limited backup in flight.
  • System management is fully automatic.
  • If one generator fails, nonessential equipment will shed automatically to preserve power for essential systems: The vapor cycle air conditioning system will turn off and the electric windshield heat, if selected, will protect only one anti-ice zone per side.
  • All electrical controls are located on the left section of the cockpit panel, with system status displayed on the MFD.
  • An external power port is available under the right engine for GPU starts.

ELECTRICAL SYSTEM SWITCHES



Battery Switch

  • Location: Pilot DC POWER sub panel.
  • Positions: OFF, BATT, EMER.
  • Functions:
    • OFF: Battery isolated from all buses except the emergency power CB bus.
    • BATT: Connects battery to crossfeed bus; normal operating position.
    • EMER: Connects emergency buses directly to the battery bus, for essential systems only.
      *The emergency busses simulation is simplified in v1.0.

Avionics Standby Instrument Switch

  • Location: Avionics switch panel.
  • Positions: STBY INST / OFF / BATT TEST.
  • Functions:
    • STBY INST: Powers standby instruments and whiskey compass light from standby battery.
    • OFF: Disconnects standby battery.
    • BATT TEST: Performs capacity check (green = pass).
      *      BATT TEST is not simulated in version v1.0

Generator Switches (Left and Right)

  • Location: Pilot DC POWER sub panel.
  • Positions: GEN / OFF / RESET.
  • Functions:
    • GEN: Allows GCU to close generator relay thus connects generator to feed bus.
    • OFF: Opens generator relay.
    • RESET: Spring-loaded position to re-energize generator field after a fault.

Engine Start Buttons (Left / Right)

  • Location: Pilot ENGINE START sub panel.
  • Function: Closes the start relay to power the starter from the battery or GPU.
  • Indication: White light in button = relay closed (starter engaged).
  • DISENG button between them manually opens start circuit to abort start.

Battery Disconnect Switch (Guarded)

  • Location: Above pilot’s left armrest, side console.
  • Positions: NORM / BATTERY (disconnect).
  • Function: Opens battery ground via the battery disconnect relay (isolates battery from aircraft power).
  • Use: Emergency only (battery overheat or stuck start relay).
  • Notes: Operates only if the main Battery Switch is in BATT position.

Interior Disconnect Switch

  • Location: Pilot side console.
  • Positions: NORM / DISCONNECT (UP).
  • Function: Opens master interior relay, removing power from cabin systems (lighting, fans, outlets).
  • Notes: Cockpit and flight systems unaffected.