RDC Diesel Scheme

RDC Diesel Scheme

The Budd Rail Diesel Car, RDC or Buddliner is a self-propelled diesel multiple unit (DMU) railcar. Between 1949 and 1962, 398 RDCs were built by the Budd Company of Philadelphia, Pennsylvania, United States. The cars were primarily adopted for passenger service in rural areas with low traffic density or in short-haul commuter service, and were less expensive to operate in this context than a traditional diesel locomotive-drawn train with coaches. The cars could be used singly or several could be coupled together in train sets and controlled from the cab of the front unit. The RDC was one of the few DMU trains to achieve commercial success in North America. RDC trains were an early example of self-contained diesel multiple unit trains, an arrangement now in common use by railways all over the world.

Sound Projects

There is 1 Sound Project for this Locomotive
RDC Diesel Scheme 8 bit project by AJ Ireland, added on Feb. 3, 2014

Digitrax RDC Sound scheme.  Copright (c) Digitrax Inc. July 18th 2007

project: rdc.spj
SDF:      RDC  Diesel Scheme
Author  AJ Ireland
    Digitrax Inc.

(A) Function Key Usage:

F0-     Lights
F2-     Horn,              [CV150 selects Horn type]
F3-     Coupler crash        [Autocoupler/brake set by  CV151 max spd]
F4-     Air feature disable- F4 to OFF enables pop-off and starts compressor
F7-     Crossing Gate Airhorn    
F8-     Mute control,     [F8 ON is muted.]
F9-     Engine Brake squeal
F10-     Crossing gate Airhorn sequence
F11-     Sanding cycle
F12-     Cab door closing

(B) RDC Sound FX defined CV's:     [decoder CV8=8  Factory reset value in sq. brackets]

CV58    Master Volume, 0-15, 0= max, (F8 used for Mute) [9]

CV122    Product TYpe, 12 = Digitrax SFX sound decoder     (Read Only Value)
CV123    Hardware Version                   (Read Only Value)

CV135    Volume when Muted                [00]

User configurable SoundCV's:

CV140    PRIME mover vol                0-64    [60]
CV142    Horn volume                0-64    [60]
CV143    Air features volume (popoff, comp)     0-64    [30]
CV145    Misc vols                 0-64    [40]        
CV148    Compressor Start rate                [30]
CV149     COMPRESSOR ON time                [20]
CV150    Horn Selector        0=std P5 Horn , 1=Playable volume  Horn 2=Alternate Horn     [0]
CV152    Author ID        Digitrax=0xdd        [221]
CV153    Project ID        RDC             [19]

(C) General Notes

Special thanks for RDC sounds recorded by Paul Knowles.

Note:  This RDC prime mover has significant low-frequency components at idle and low throttle settings,
so the speaker enclosures should be as large as possible behind the diaphragm to extend adequate frequency response below
e.g. 300Hz. This will ensure a more "full" sound that does not appear thin or "tinny".
Each engine we have recorded has a distinct 'personality', so a particular locomotive example may sound slightly different
due to unique e.g. tappet, crank-rate shell vibrations and exhaust-stack differences. Horns and bells are often moved between locomotives, and
some roads may change/upgrade prime-movers, or change a normally aspirated engine with turbo-chargers etc.

------[end RDC SDF/DECODER definition]--------------

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