For a potential UKSB for T2013 I had stats for old traction / ploughing engines and steam trucks worked out as there are a fair few of them kicking round the UK. Same with old Sentinel steam trucks.
Assuming you have a semi-competent metal basher / plumber you should be able to keep it working for a time.
Side note is that a lot of the engines had pulleys for belt drive systems to let them turn generators and some had small dynamo's built in for running lighting etc.
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