L-1011 Trainer Installation: Instrument Lighting Buildout (Flight Station and MIP)

L-1011 Trainer: Flight Station Cabling and Instrument Light Power Units

As I mentioned in some of my earlier posts, the Lockheed L-1011 cockpit has quite a large number of instrument, indicator and light plate power buses. For the last few work sessions I have been focusing on the instrument and indicator light buses. Instrument lights and the panel light plates are powered by 5VDC sources. Indicators, on the other hand, are powered by 24VDC. The image above shows the two 5VDC power supplies (each is rated at 20A) that drive the instrument lighting. The one on the right is of the lower Flight Station and the one on the left is for the upper Flight Station instruments. Power Supplies are Lambda-Nimic and the distribution blocks are Phoenix Contact. Each of the 5VDC source is further split into sub-buses. The different buses for the Flight Station are:

1. Flight Station Lower Left
2. Flight Station Lower Right 
3. Flight Station Upper Left
4. Flight Station Upper Right

The left and right does not always indicate "left" and "right" on the station as viewed from a geometric point of view, but it is more a left and a right power bus. Here is an example on the Hydraulic System panel instruments that I powered up today:

L-1011 Trainer: Hydraulic System Instrument Lights

The top row of instruments (see image below); four Hydraulic Level indicators, are powered by instrument light bus "FE Upper Left" while the instruments for the Air Turbine Motor (ATM) RPM as well as the four Hydraulic Pressure indicators on the bottom of the panel are powered by "FE Upper Right".

L-1011 Trainer: Hydraulic System Instrument Lights

Here is what this looks like in the WDM with line "A" being "FE Upper Left" and "B" represents "FE Upper Right"

WDM for L-1011 Hydraulic Panel Instrument Lighting

A few weeks ago, Jim mounted four 5VDC power supplies in the forward Main Instrument Panel and today I finished cabling the power supplies into the the Circuit Breaker system of the L10 Trainer. There is a breaker for the 115V side of each of those supplies as well as a break for a "Left and Right" side on the 5VDC output side. The power supplies (top to bottom are):

• Top: First Officer Instrument Lighting
• Center Top and Center Bottom: Center Instrument Panel Instrument Lighting 
• Bottom: Captain's Instrument Lighting 

L-1011 Trainer: MIP Instrument Power Supplies

Time goes so fast during sim building and after working on the cabling for the power supplies I only had time left to connect a few instruments that are part of the "Center Instrument Right" light bus. The instrument lighting powered are the N1 (Eng1-3), Rated EPR, Standby Horizon and Standby Airspeed Instruments.

L-1011 Trainer: Initial Buildout of the Center Left Instrument Lighting Bus

Here is what this looks like in the WDM:

L-1011 Center Instrument Lighting Schematic

L-1011 Trainer: Center Instrument Lighting Bus Buildout