Bachmann 35-125BSF Class 20/3 20311 'Class 20 'Fifty'' DRS Blue Diesel Locomotive - DCC Sound

The Bachmann Branchline Class 20/3 was first released in 2021, and since then we’ve improved this stunning model further by fitting marker lights at the cab ends, meaning that when operated prototypically as pairs nose-to-nose, a full complement of lighting can now be enjoyed at either end of the formation. Forming a pair of models in original DRS Blue livery is No. 20311 ‘Class 20 ‘Fifty’’.

This latest generation Bo-Bo diesel locomotive from Bachmann Branchline brings the classic BR Class 20 right up to date, capturing the subtle lines of these distinctive locomotives whilst sporting the modern look of the Class 20/3s – which had their ends made flush during refurbishment and fitted with Wipac light clusters and multiple working connectors. The high level of detail is brought to life by the intricate livery application, whilst the powerful drive mechanism, Plux22 DCC interface and a full suite of lighting offers the perfect complement to the model’s good looks.

• Bachmann Branchline OO Scale
• Era 9
• Pristine DRS Blue livery
• Running No. 20311
• Named ‘Class 20 ‘Fifty’’
• Etched Nameplates Included
• SOUND FITTED – Fitted with a Zimo MS450P22 DCC Sound Decoder – See below for the function list
• Length 190mm

DETAIL VARIATIONS SPECIFIC TO THIS MODEL

• GPS Aerial
• Two-piece Radiator Shutter (one side only)
  
• Early Fluted Bogie Equalising Beams
  
• Blanked Speedo Drive
  

BACHMANN BRANCHLINE CLASS 20 SPECIFICATION

MECHANISM:

• Five pole, twin shaft motor with two flywheels providing drive to both bogies
• All axle drive
  
• Electrical pickup from all wheels
  
• Separate metal bearings fitted to each axle
  
• Diecast metal chassis block and bogie towers
  
• Diecast metal gearboxes, with gearing arranged for prototypical running speeds and haulage capabilities
  
• 16.5mm (OO gauge) wheels to NEM310 & NEM311 standards with authentic profile and detailing
  
• Detachable coupling pockets to NEM362 standards fitted to each bogie
  
• Designed to operate on curves of second radius (438mm) or greater
  

DETAILING:

• Bogies constructed from multiple components featuring full relief detail
• Rotating radiator fan (un-motorised)
  
• Separately applied metal detail parts, including handrails, grab handles, sand pipes and etched fan grilles
  
• Sprung metal buffers
  
• Body-mounted snow ploughs supplied with each model
  
• Each model supplied with a full set of decorated, model-specific bufferbeam pipework and accessory parts
  

LIGHTING:

• Directional lighting, switchable on/off at either end on DCC or Analogue control
• Day/Night Mode, selectable on DCC or Analogue control
  
• Cab lighting, switchable on/off on DCC or Analogue control
  
• Authentic light colours and temperatures selected for each model based on era and application
  

DCC:

• Plux22 DCC decoder interface

SOUND:

• Speaker installed in all models for optimum sound reproduction
• Zimo MS450P22 DCC Sound Decoder fitted to SOUND FITTED versions
  
• Sound files produced specifically for the Bachmann Branchline Class 20 using recordings from real locomotives
  
• SOUND FITTED models operate on DCC and Analogue control as supplied. On Analogue, an authentic engine start up sequence and running sounds are produced when power is applied
  

LIVERY APPLICATION:

• Authentic liveries applied to all models
• Multiple paint applications employed on each model using BR and corporate specification colours
  
• Logos, numerals and text added as appropriate using multi-stage tampo printing using authentic typefaces, logos and colours
  
• In addition, where applicable Etched Nameplates and Plaques are also provided
  

SOUNDS

F0 - Directional Lights - On / Off (plus Light Switch Sound)

F1 - On - Warm Engine Start / On (with F8 On) - Cold Engine Start

F2 - Brake

F3 - Single Horn (Speed Related)

F4 - Two Tone Horn (Speed Related)

F5 - On - Light Train Mode / Off - Heavy Train Mode

F6 - Engine Idle / Coasting

F7 - Speed Lock

F8 - Cold Start

F9 - Flange Squeal (Speed Related)

F10 - Guard's Whistle

F11 - Buffer Up

F12 - Coupling

F13 - Cab End High Intensity Light (If Fitted)

F14 - On - Night Mode Directional Lights / Off - Day Mode Directional lights (If Fitted)

F15 - Detonators

F16 - Priming Pump

F17 - Wagon Snatching & Buffering

F18 - On - Driver's Door Open / Off - Driver's Door Closed

F19 - Fade All Sounds

F20 - Nose End Directional Lights Off

F21 - Cab End Directional Lights Off

F22 - Cab Light On (Only when Stationary)

F23 - Windscreen Wipers

F24 - Compressor

F25 - Spirax Valves

F26 - Shunt Mode

F27 - Volume Down

F28 - Volume Up

Analogue Users: Please note that normal load running sounds and any other automatic or randomised sounds will also operate when this model is used on analogue control (DC) straight from the box!

CLASS 20/3 HISTORY

The British Railways Board's (BRB) 1955 modernisation plan called for a change to alternative forms of traction and manufacturers were asked to produce trial or initial designs for evaluation. English Electric adapted an existing design based on an export model for a 1,000bhp diesel and 20 were built as a pilot scheme for assessment.

The first batch was built in 1957 and the diesels were assigned to work from Devon's Road depot, East London. The design was a success from the start and by 1962 a total of 127 had been built. Following assessment of all the Type 1 diesels, BRB placed a further order increasing the total to 228 by 1968 and the design became the BR standard for 1,000bhp diesel locomotives. With the introduction of TOPS the locomotives were designated Class 20 and renumbered 20001 to 20228. The locomotives were principally designed for freight work but also saw service on summer passenger trains where train heating was not required. The Class 20s worked over the Eastern, London Midland and Scottish regions as well as into Wales and were commonly associated with coal traffic. The only drawback the Class had was its single end cab, unlike modern designs that have a cab at each end. BR resolved this problem by regularly operating the Class 20s as pairs, nose to nose, and with the combined power of 2,000bhp they were able to haul the heavier block freight trains.

BR's decision to switch to Type 5 and in particular Class 60 diesels in the late 1980s started a gradual withdrawal of the fleet, with just 28 left by 1994. A tribute to the design is that after 45 years the Class is still in service with DRS on mainline duties following refurbishment, the resulting locomotives being designated Class 20/3s. At least 28 of the class are now preserved.