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Hi Paul & welcome to MRF.

I have three Brawa loco's all running on DCC & they do get a little warm - on these locos there is very little air space round the motors as they are virtually encased in the heavy chassis, so I would not worry too much, however, one source of excess heat often overlooked is the lights (unless they are LED) if the loco is left standing for longish periods with the lights on full they can generate too much heat - most decoders have the option to "dim" the lights so this could be worth looking at.

Two of the Brawa's "hum" a little, the other if virtually soundless.

Hope this helps.
 
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