Remotoring Sunset PRR M1a 4-8-2 Mountain
Original Sunset Model
Sunset Models, Catalog HO-26A 80-run

Some pictures from the seller's website http://trainmaster.ch/

Prototype
PRR M1a.jpg
Wikimedia
Pennsylvania Railroad M1b 6755.jpg
Without boiler jacket, Wikimedia

Coreless DC Motor

Coreless DC Motor

I replaced the Canon CM22 can DC motor by a coreless DC motor (Maxon A-max22 12V/6W). Datasheet, Distrelec part number 154-22-110.

MASSBILD-A-MAX-22-110143-new.jpg

Values at Nominal Voltage 12 V

  110147 110065
Leerlaufdrehzahl 10200 min-1 11700 min-1
Leerlaufstrom 45.8 mA 32.3 mA
Nenndrehzahl 7060 /min 5430 /min
Nennmoment (max. Dauerdrehmoment) 6.96 mNm 2.39 mNm
Nennstrom (max. Dauerbelastungsstrom) 0.681 A 0.293 A
Anhaltemoment 23.7 mNm 4.76 mNm
Anlaufstrom (stall current) 2.17 A 0.519 A
Max. Wirkungsgrad 72 % 56 %
Drehmomentkonstante k 10.9 mNm/A 9.17 mNm/A

Roller Test Stand Videos

Roller Test Stand Videos

Decoder Installation

Decoder Installation

BOM

  • TSU-2200 Steam-2 (2 Amp) Tsunami2 Decoder - Steam, SoundTraxx #884007
  • 28mm x 40mm Oval Speaker Gasket Kit, SoundTraxx #810139
  • Medium Oval Speaker, SoundTraxx #810078
  • Pin Header 2.54 mm (1/10") 3x2
  • Pin Socket 2.54 mm (1/10") 3x2

Docs

Soundtraxx Tsunami2 TSU-2200

Wiring

Locomotive

Color NMRA JST Pin# Loco Header Pin# Function
Red 8 1 Right Rail Pickup
Orange 7 2 Motor(+)
Gray 3 3 Motor (-)
White 5 4 Headlight
Green 9 5 FX3 (Ashpan Flicker CV 51: 23+128=151, F24)
Blue 6 6 Function Common (+12V)

Tender

Color NMRA JST Pin# Function
Black 2 Left Rail Pickup
Yellow 4 [Backup Light]
Blue 6 [Function Common (+12V)]
Purple - Speaker (+)
Purple - Speaker (-)
Blue - Current Keeper [Function Common (+12V)?]
Black - Current Keeper [Ground?]

Spare

Color NMRA JST Pin# Function
Brown 1 FX4
Green/White - FX5
Brown/White - FX6

Sound Configuration

Function CV Value Type
Sound Configuration 1 112 8 (default)
Fuel Type   +1+2, 0 Hand-shoveled Coal
Injector   +4, 0 Non-lifting
Power reverser   +8, 8 enabled
3-cylinder exhaust   +16, 0 disabled
Articulated wheel-slip   +32+64, 0 disabled
Articulated exhaust   +128, 0 disabled
Engine Exhaust Control 114 90 faster, for 4 chuffs per revolution
Whistle 120 42 PRR Round Top 3-Chime
Bell 122 15 Medium Brass 2
Exhaust Chuffs 123 4 (default, Medium 2)
Airpump 124 3 (default, cross compound 2)
Dynamo 125 2 (default, dynamo 3)
Coupler Select 126    
Poppet Valve Release Rate 200    

Motor Configuration

Function CV Value Type
Low-Speed Compensation 211 150  

Headlight

  • Cal Scale HO PRR Headlight #190-477
  • Cal Scale HO Headlight PRR Modern #190-235
  • Cal Scale HO PRR Headlight Bracket #190-478

Finished Model

Finished Model

-- Peter Schmid - 2018-12-03

Creative Commons License
This work by Peter Schmid is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Topic attachments
I Attachment History Action Size Date Who Comment
JPEGjpg M1-tender-bottom.jpg r1 manage 190.5 K 2019-08-10 - 14:27 PeterSchmid  
JPEGjpg M1-tender-decoder.jpg r1 manage 201.6 K 2019-08-10 - 14:27 PeterSchmid  
JPEGjpg MASSBILD-A-MAX-22-110143-new.jpg r1 manage 77.5 K 2018-12-31 - 17:32 PeterSchmid  
JPEGjpg PRR_M1a.jpg r1 manage 37.4 K 2018-12-31 - 17:22 PeterSchmid  
JPEGjpg Pennsylvania_Railroad_M1b_6755.jpg r1 manage 352.9 K 2018-12-31 - 17:25 PeterSchmid  
JPEGjpg UL-087-02.jpg r1 manage 36.2 K 2018-12-03 - 20:21 PeterSchmid  
JPEGjpg UL-087-06.jpg r1 manage 35.2 K 2018-12-03 - 20:21 PeterSchmid  
JPEGjpg sunset-PRR-M1a-frame.jpg r1 manage 654.6 K 2018-12-03 - 20:25 PeterSchmid  
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