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A Helpful Guide - Average Current Draw


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I thought this might be a helpful little guide to those with older locos.

These are average current draw Tri-ang-Hornby readings from the early 1970's quoted in catalouges, trade info etc. Worth bearing in mind is that the motor magnets loose magnetism over time and windings can decay so current draw may be higher today than it was then. Milliamps is a measurement of current consumed, there are a 1000 milliamps in 1Amp.

R.861 Evening Star   3 Pole Ringfield Drive. 250Milliamps

R.871 Princess Coronation Class Streamlined. 450Milliamps

R.258/NS Princess Class Loco with Synchrosmoke. 840Milliamps

R.52S "Jiny" 3F tank loco with Synchrosmoke 740 Milliamps.

R.354 Lord of The Isles X.05 motor powered 430 Milliamps

R.553. Caledonian Single X.05 motor powered 430 Milliamps

R.759/N Hall Class loco 330 Milliamps

R.855/N Flying Scotsman with firebox glow and tender sound 560 Milliamps

R.866/S B12 Loco with Synchrosmoke 740 Milliamps.

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Very usefull SoT.

I take it average means typical running currents and stall current would be a tad higher.

I've just dual motored an older Class 56 (R2335E) with new 3-pole ringfield motor bogies and wondered what the total current draw would be so that I can pick a suitable decoder for it.

I didn't think an R8249 would be man enough for the job, and was looking at a Sapphire, but if your Evening Star current is anything to go by then the little 'un may just be OK.

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I thought this might be a helpful little guide to those with older locos and those DCC them so have posted in both sections. The list is by no means exhaustive.

These are average current draw Tri-ang-Hornby readings from the early 1970's quoted in catalouges, trade info etc. Worth bearing in mind is that the motor magnets loose magnetism over time and windings can decay so current draw may be higher today than it was then. Milliamps is a measurement of current consumed, there are a 1000 milliamps in 1Amp.

R.861 Evening Star   3 Pole Ringfield Drive. 250Milliamps

R.871 Princess Coronation Class Streamlined. 450Milliamps

R.258/NS Princess Class Loco with Synchrosmoke. 840Milliamps

R.52S "Jiny" 3F tank loco with Synchrosmoke 740 Milliamps.

R.354 Lord of The Isles X.05 motor powered 430 Milliamps

R.553. Caledonian Single X.05 motor powered 430 Milliamps

R.759/N Hall Class loco 330 Milliamps

R.855/N Flying Scotsman with firebox glow and tender sound 560 Milliamps

R.866/S B12 Loco with Synchrosmoke 740 Milliamps.

R.754/R.868 M7 Loco with opening smokebox door and firebox glow. 560 Milliamps

R.754/R.868 M7 Loco with opening smokebox door, but without firebox glow. 330 Milliamps

R.869/S Winston Churchill Battle of Britain Loco with synchrosmoke. 820 Milliamps.

R.59/S BR 3MT tank loco with synchrosmoke 730 Milliamps

R.259/NS Britannia Class Loco with Synchrosmoke 840 Milliamps

R.335/B Nellie Loco 380 Milliamps.

R.152 Class 08 (Tri-ang type) Diesel Shunter 400 Milliamps

R.253 Dock Shunter Diesel with working lamp 410 Milliamps

R.351 EM2 Class loco 420 Milliamps

R.357 Class 31/Brush type 2 A1A-A1A Diesel loco 300 Milliamps

R.751 Class 37/English-Electric Type 3 CO-CO Diesel Loco 300 Milliamps

R.753 A.E.1/AL1/Class 81 BO-BO Electric overhead loco 460 Milliamps

R.756 Beyer Peacock Type 3 B-B Hymek Diesel Loco 340 Milliamps

R.555/C Blue Pullman 2 Car Unit 330 Milliaamps

R.157/C Class 101 DMU 2 car Railcar (Tri-ang type) 320 Milliamps.

Illuminated Mk1's

R.722 Intercity Second Class Coach 140 Milliamps

R.723 Intercity Brake First Coach 140 Milliamps

Accesories

R.266 Station Lamps 140 Milliamps.

 

 Brilliant, very useful. Thanks!

 

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