DCC Install
In 1992 NMJ made a small serie of Superline models of the NSB class BM86 and BM91. Until now they are the only models on the market of this very typical Norwegian motor car. Over the years I have been able to get a BM86, BM91 and a BFS86 (an unpowered trailer, aka cab car).
As it obviously pre-dates DCC, installing a DCC decoder requires some work. As I also wanted to install sound I had to look at the sound options. The BM86 has two Rolls-Royce engines mounted underneath the frame. As I prefer ESU LokSound I checked their sound library and these engines are not covered. I decided to use the Brawa VT137 sound. It has the sound of two diesel engines used in a motor car. Interesingly the VT137 ran even in Norway, as the Cmdeo type 10 in the early 1950's.
BM86
The BM86.09 with all the various DCC parts that will complete the installation. This includes an ESU Loksound decoder, ESU sugar cube speaker, ESU Power pack and ESU light board. The TCS VR1.5 will be used to give the constant 1.5V for the existing grain of rice lights.
The BM86.09 opened. Many years ago I installed a Zimo decoder in this unit. It was mounted in the roof. This will be replaced with sound and lights and better motor control so the BM86.09 will run better.
To be continued...
BM91
The BM91 is opened and the original light control board is removed. There is a small voltage control unit in the motor car and that is connected via a connector to the light board in the roof. This will all be removed.
The interior is removed as well and this allows for rewiring the motor and the leads to the trucks. The sound decoder and adapter board is shown in the front. The BM91 will get interior light with a light decoder from ESU (shown underneath the interior).
The motor car is ready. The decoder is placed on top of the motor. The sugar cube speaker is placed in the space behind the motor. A TCS VR1.5 voltage regulator is placed in the toilet space, this is used to control the front and rear lights. An ESU power pack is also installed and shows on the left. On the far right a small two pole connector allows for the track power connection to the DCC interior light board.
This video shows the BM91 with the interior light and sound.
BFS86
The BFS86 is a unpowered trail/cab car. I installed a TCS FL2 function decoder which allows for controlling the front lights and top light/beam seperatly. I used resistors to control the lights, instead of the voltage regulator that I used in the BM86. The resistors are hidden and placed between the interior and the frame. Two connectors are visible. One connects the lights to the function decoder. The other connector is for the DCC interior light board.
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