Center Panel

Lower Panel

On the lower center panel are the main engine instruments.

1. Engines RPM: Indicates the rpm for each engine. Some values you must have in mind:
   • For take off only, set 2700 RPM.
   • After take off, for climb out, reduce RPM at the top of green area, ~2550 RPM.
   • As you climb, above 5-6,000 ft, reduce even more, as required.
   • Keep the engine around 1000 RPM, for warm up.
2. Manifold Pressure: Values to have in mind:
   • For take off, set the power at the top of green area. If heavy take off weight or/and short runway, you can set more power, but in any case below the red line!
   • For climb, set power at 40-42 inHg.
3. Engine Oil Pressure: Indicates the oil pressure, per engine. Critical to keep the needles inside the limits.
4. Fuel Pressure: Indicates the fuel pressure at the carburetors, per engine.
5. Annunciator: Indicate if a pressure (oil or fuel), is not within operating limits. Rotate each light to adjust brightness.

Upper Panel

1. Fire Test: Press the button to test the fire alarm system, lights (#2) and bell ring. Requires at least battery power.
2. Fire Alarm Lights: Indicate if a fire is sense in one of the engines. Rotate the light to adjust brightness.
3. Sperry A-3A Automatic pilot: Read detailed description and operation on the Automatic pilot page.
4. Oil Pressure: Indicates the oil pressure for the autopilot.