Handbags (The sad, the bad and the ugly. Non-productive stuff here.)
Big boy's trip is/was on youtube.
The UK oil conversion (There may have been more than one), at least that one I know of, was attempted on a Beyer Garrat: another massive locomotive (by UK standards) built to bank coal trains from Barnsley area collieries up the Eastern approach to the then Woodhead Tunnel, prior to electrification of the Woodhead route.
Banks on this line were nominally 1 in 40, but mining subsidence had rendered the climb much steeper.
It is the only section of the UK network where trains were regularly scheduled to employ FOUR locomotives, and occasionally a FIFTH if assistance from the serving bank engine was required.
Replied: 30th Apr 2017 at 17:16