@Pingman posted:@Hot Water, thanks for the fast and illuminating reply.
What distinguishes a "Royal" from a non-Royal Hudson?
In golf, a "Royal" golf club (e.g. Royal From, Royal Bikdale, etc.) is a title bestowed by the King or Queen of England. Was that done for steam locomotives?
The Royal Hudson is a semi-streamlined locomotive dubbed because one pulled King George VI and Queen Elizabeth's train in 1939 on the CPR. The CPR got permission from the King (who was somewhat of a rail buff) to designate all locomotives of the class to be called "Royal Hudson's" The Royal Hudson's also display a facsimile of the crown on the running board flanks.
The non-royal Husdon's are unstreamined locomotives of a different class.
Rusty