In the day's of old, wouldn't the Hall be put behind the Castle, I believe that the Castle was the train engine and the hall a pilot engine. I would be happy if I am wrong?
I have always associated the pilot engine as the lead engine with the 2nd as train engine with the pilot engine smaller/not as powerful. However there are known cases particularly on the GWR & LMS where a higher class engine has been in front. eg A GWR Castle in front of a Hall or a LMS Jubilee in front of a Black 5. Particularly towards the end of the steam era it was a case of if it was serviceable that will do if a Pilot engine was required. Remember reading somewhere many years ago when Newton Abbot sent out a GWR King (as they had nothing else available) to pilot another King through to Plymouth on the Cornish Riviera Express, the only known case prior to preservation of this happening. However the GWR had some complex rules relating to double heading. If you do a internet search for 'Double heading' & go on Wikipedia & scroll down to the section 'special terminology employed' you will find out more.
I think the rule over the South Devon banks was that if the pilot engine had a bogie at the front ('Grange', ''Hall' etc) it would go on the front. If it was - say - a 43xx or Large Prairie, it would be put 'inside' to allow fast running in the stretch between Rattery and Hemerdon. The Large Prairies more often banked freights from the rear.
In the day's of old, wouldn't the Hall be put behind the Castle, I believe that the Castle was the train engine and the hall a pilot engine. I would be happy if I am wrong?
I have always associated the pilot engine as the lead engine with the 2nd as train engine with the pilot engine smaller/not as powerful. However there are known cases particularly on the GWR & LMS where a higher class engine has been in front. eg A GWR Castle in front of a Hall or a LMS Jubilee in front of a Black 5. Particularly towards the end of the steam era it was a case of if it was serviceable that will do if a Pilot engine was required. Remember reading somewhere many years ago when Newton Abbot sent out a GWR King (as they had nothing else available) to pilot another King through to Plymouth on the Cornish Riviera Express, the only known case prior to preservation of this happening.
However the GWR had some complex rules relating to double heading. If you do a internet search for 'Double heading' & go on Wikipedia & scroll down to the section 'special terminology employed' you will find out more.
I think the rule over the South Devon banks was that if the pilot engine had a bogie at the front ('Grange', ''Hall' etc) it would go on the front. If it was - say - a 43xx or Large Prairie, it would be put 'inside' to allow fast running in the stretch between Rattery and Hemerdon. The Large Prairies more often banked freights from the rear.