INSTRUMENT PANEL LAYOUT
The IFR instrument panel contains the flight instruments, engine instruments and the radio racks. All of the wiring from the instrument panel terminate at the Big Ass Plug. This plug has 28 connections that connect the panel to power sources and deliver power to items in the aircraft. The instrument panel can be removed by disconnecting the Big Ass Plug and the vacuum lines. The plug's price was $10.00. Available thru Haywire Inc. Joplin, MO. 417-623-7239
Radio Rack:
The radio rack was mounted to a 3/4x3/4 angle on the left sub panel. The left sub panel was trimmed 1/8" from the right edge towards the nutplates. The angle was placed on the right side of the sub panel and attached using the nutplates for the main panel. The main instrument panel has a corresponding angle on the right side of the radio rack opening. When the main panel is removed, the screws attaching the right side of the radio rack are removed. This leaves the radio rack attached to the left sub panel.
The terminal strip mounted to the back to the forward baggage compartment is used to route power and ground to the radios and various components. The silver box below the terminal strip is the encoder for the transponder.
Panel Wiring:
Behind the instrument panel is the wiring. The gray square plug at the center of the picture is the Big Ass Plug. All wiring from the panel goes to or from this plug. The large black box in the upper right is the cooling fan for the avionics. Just above the cooling fan and to the left is the altitude transducer for the Stec30 autopilot. In the center of the picture is the terminal strip that supplies power and grounds to the various components. Above the terminal strip is the filter for the vacuum system.
The parking brake valve replaces the tab mount for the brake lines. The parking brake cable routes up from the valve - over the vacuum filter - down thru the left gear support box. The parking brake control is mounted on the aft side of the gear support box in front of the throttle quadrant. The work light is removed before flight.
Circuit Breaker Panel:
This circuit breaker panel is laying on its' side. This allows access to the main bus bar and routing of wires.
The CB panel's buss bar is divided into the main bus and the radio bus. All instrument light switches and dimmer controls are located on the fwd edge of the CB panel. Wires for the aircraft were routed under the left and right armrests. The 5/8" tooling holes were enlarge to 3/4" and a rubber grommet was inserted into each hole. Spiral wrap encloses each wire bundle under the arm rest. The large #2 wire on the floor is the battery cable. This cable was routed on the right side below the aircraft floor.
Five switches are used to control
aircraft electrics.
Autopilot
Radio Master
Nav Lights
Strobe Lights
Landing Lights
Fuel Pump
These switches are located on the instrument panel
below the radio rack.
Three warning light, located on the instrument panel
are used for:
Alternator Voltage Low/High
Fuel Pump On
Master On
The "Master On" light is wired thru the NC portion of the hour meter sender. When the engine is off and the master switch is on, the light will illuminate to prevent leaving the master on. When oil pressure is sensed at the sender, the light will go out. It will also tell you when the engine quits in flight.