The "Bones" were very reliable when they were maintained, regularly in the 95%+ category in the late BR days before EWS took over.
Indeed.
When I've posted this on other forms, others pile in and says it is wrong. It is not wrong. It is absolutely correct they were turning 95%, and at that time way higher than 20s and 37s or anything else INCLUDING CLASS 08. My gen is not from an 58 enthusiast either, but from those in Control who ran the MGR program.
Although, I do not think this 95% period was when EWS took over but earlier. I believe the 95% was at the time of breakup of BR freight into the three freightcos - and reliability suffered exactly because of that breakup, and inter company accounting.
IIRC there was just one minor defect that stopped them from getting higher than 95% - it was something to do with the cooling system, one of the rotating or moving parts, maybe a water pump or motor or maybe a drive belt that they never managed to resolve. What they were doing was simply changing this item more often than needed on a lower interval exam, but this had the knock on effect this exam took longer than it ought to have. So reliability went up (i.e. changing the item before it failed the loco) but availability was down from what it could have been (because they were spending longer time on xmas).
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Nick
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they often on dragging new st to Nuneaton on sundays in the early 80s great trash hang out of mk2 air cons
I would dispute a 58 ever thrashed at anything.
Not when compared with other locos.
58s were quite heavily silenced. Think about it - they must be silenced. The engine lump is basically the same as a 37, merely an update of it.
I did a lot of those 58 drags, had something like 30 of the class on them, including the very first 58 drag, and as I lived in Coventry i had a number of emergency weekdays drags as well as all the Sundays planned stuff.
Some Sundays you had one 58 one 56 and one 50 on them. You'd not say a 58 thrashed if you had had a 50 one the same day to compare like for like on the same line on the same load.
In all the 58s I had, I would only say there was one run that for me came audibly noteworthy, and that was the pair on the BoneBreaker tour doing Down the GEML through Seven Kings etc . And as that was right at the end of the class maybe the 58(s) were not working properly therefore making more noise than they should.
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Nick