There's the heart of the problem. He had worked systematically for the position of CME at the NER, had a good WWI service record; and then his career map is simply destroyed by the grouping. From heir apparent at one of the most prosperous pre-group companies, to not even really considered for the post on the LNER and nothing he can do about it. Robinson's great success with the 8K/ROD spoke for itself, although Gresley's A1 for the GNR had the greatest development 'stretch' potential of any locomotive then existing in the UK. Against which Thompson had no design to his credit, simply poor timing from his perspective, he hadn't then succeeded Raven.mick b wrote:...Son in law of Sir Vincent Raven CME of the NER who DIDNT get the job at the LNER ...
Once the dust settles, he finds himself not completely in sympathy with his new chief, and Gresley's right hand man is Bulleid. That's bad enough, but then Gresley goes on to success after success; and of course when Thompson does good work like the B12/3 development, it's Gresley's design. It's Bulleid who gets the call when the Southern want a new CME...
The kind of people who can realistically hope for top jobs in any field typically have quite an ego; it is a necessity, and Thompson's took a beating. Clearly he had career ambitions, when he finally got the post, he told people he only had a short time to implement his scheme (because of retirement) and that too influenced the quality of design. There wasn't a twenty plus year tenure ahead to carefully work things out, if his complete loco scheme for the LNER were to be realised he needed them designed and building within five or six years.
So the designs are got out in rapid time. Syntheses of existing proven parts work well : Doncaster knew how to design and build cheap and effective boilers, excellent steam circuits, good gear and exhaust systems. When variation away from past designs is attempted the results are mixed. Had there been time to work up the more novel aspects and eliminate the weaknesses before general production his record would look better. But time was against him, and in terms of reputation, a predecessor who has deservedly made the headlines for twenty peacetime years is going to cast a very long shadow. Even Peppercorn's well liked pacifics subsequently never acquired the 'glow' that surrounded the Gresley designs...
Not a bad guy at all, just massively hampered by circumstances.