Gday  Richard,All

The M&MTB did have roller bearing armatures, the GE288,a modified 247
and AFAIK,the MV101AR

Cheers,     Mick

On 12/12/2018 10:23 pm, 'Richard Youl' via TramsDownUnder wrote:
> Hey Mick,

>

> Who knows now why some GE247 motors were faster than others? But

> something to do with current in either armatures or field coils must

> have been different. I don’t think Preston ever ventured into roller

> bearings in motors.

>

> Regards,

>

> Richard

>