Please specify the line…..current or former identities will be acceptable.
Sorry, my knowledge of HK's rail network is zero.
Yes. 56116 to 56135 built at Crewe when Doncaster switched to 58 construction.
he issued rather odd specifications that resulted in some rather odd locos, including some that had geared drive and others which had the boiler on separate frames to the cylinders and driving wheels.
That's right - but what specifically did he ask for that caused such strange locos?
I'll throw an oar in...
Not that. @Spamcan81 had the right idea - what did Brunel specify that resulted in locos with (for example) the boiler on a separate frame and also very large wheels?
Ah... Did he mandate a low centre of gravity, which would have meant putting the boiler where conventionally-sized wheels would have had their axles?
Not according to my source, although of course stability must have been in his mind in deciding on broad gauge. He specified two things, one of which resulted in (for example) the boiler on a separate frame and the other in (for example) very large wheels. Get one of them and the floor is yours!
That's one of the two parameters Brunel specified and it resulted in large wheels. The other was axle load. He specified no more than 10.5 tons on six wheels or 8 tons on four. The problem was that the large wheels were heavy so boilers had to be small to compensate. To quote Angus Buchanan's "The Life and Times of Isambard Kingdom Brunel"
