L-1011 CPT Installation - DC Hot Battery Bus

L-1011 Trainer - AC/DC Power Buildout

The last few weeks there had not been overly much to blog about. We continue work on the AC/DC power subsystems for the trainer. In the image above you can see 24V T/R units that will simulate the 3  transformer rectifiers (T/R) that are powered by the aircraft engines as well as the BATTERY simulator. There is only one more T/R unit that is missing and that will be for the DC Essential (ESS) bus.

All the power supplies are convection cooled and the video clip below is a short clip of the fan monsters coming alive.

The hot Battery bus is used for a lot of things on the L-1011; like APU start up and some very basic instrumentation. One good example for the use of the hot battery bus are the clocks in the cockpit. In order to not loose time, these clocks are powered by the hot battery bus on the actual aircraft. To stay as close to the original as possible, we are simulating the aircraft's battery with the 24V 20A power supply pictured below.

L1011 Trainer - Battery System Simulator

This supply forms the battery as well as the hot battery bus and is now driving the Haydon clocks installed in the Simulator. Below is a short video of the clocks running of the central universal time base as well as the 24V Hot Battery bus.

L-1011 Trainer - Clocks on Hot Battery Bus