Having built a Coronation from High Level a few years ago, and crammed a lot of DCC electronics into similar and much smaller models, plus a RC bus in 2mm scale, then yes, RC in that loco should be possible, with the battery properly hidden. Would almost certainly start with a different motor, and possibly different gearbox. It needs planning as some parts will need modification or changes into assembly. Its much harder shoehorning into something already built.
Winander wrote:Thanks for the responses everyone.
I have bought and made MERG DCC equipment, but nothing else. As I said, I haven't any track and the only experience I have at operating is on others' models. I do like sound and particularly like the 'realism' of inertia achievable with DCC control. If I was able, I would use something other than a worm drive to enable the wheels to drive the gearbox to get more realism.
You could look at "N20" motor-gearboxes. These usually (depends on configuration) have spur gears throughout (no worms). Between £3 and £10 each, from Ebay, Amazon, Ali-express (wider range if dealing directly with Chinese sources). The "folded over" types are short enough to fit transversely in tank engines. The "in line" types need either a set of bevel gears, or a crown+pinion to move drive through 90 degrees.
Not sure what you mean by "more realism" though about worm drives per-se, other than the ability for loco inertia to drive them backwards.
The key issue in RC of model rails is numbers... DCC is now fairly well established, dominant with a lot of manufacturers world-wide. RC is still niche, with most providers not even at "cottage industry" scale, and there is no established standard for the components/systems. Even if Bachmann US is "having a dabble" with a couple of releases, its still just dabbling.
- Nigel