I had an idea how to figure this out - accident reports.Hi, what was the brake force in long tons, of a mk 1 coach and or brake coach?
bit of a weird question but I cannot find this information anywhere
Without having checked the linked file I find it hard to believe any Mk1s were as low as 23 tons - BGs and non corridors would surely be the lightest at around 30 tons with sleepers and some catering vehicles up to around 40 to 41 tons (much more than the max. 35 tons quoted). Obviously there would be variances within individual vehicle types according to what bogies were fitted, commonwealth being the heaviest.
I had an idea how to figure this out - accident reports.
These usually list the total weight of the train and crucially its brakeforce in tons.
I looked at a few to get an idea but I'll give an example of just one as I think that's sufficient.
The 1969 Morpeth derailment.
In this incident the train was formed of a Deltic and 11 Mk1 coaches, the train weight including loco was 498 tons and its total brakeforce was 376 tons.
While the Mk1s weigh different amounts due to bogie type etc adding up the figures this gives 397 tons of coaches.
A Deltic has a brakeforce of 51 tons, so we are left with 325 tons brakeforce of the 397 tons of carriages.
I get an average weight of about 36 tons for a carriage and an average brakeforce of 29.5 tons or around 82% braked weight.
Hopefully that's of some help