Smoke started billowing as the train passed through Pontrilas, Herefordshire, near the Welsh border.
Engine 75069 had stood unloved and rusting for more than two decades before being restored.
Former paratroopers Neil Young, formerly of Herefordshire, and Peter Ketley have raised more than £30,000 for military charities.
When the Brexit debate is the opposite of how it appears
A Bromsgrove man talks about his experience of being homeless
Team news as Harlequins host Worcester Warriors in Saturday's Premiership fixture at The Stoop (15:00 GMT).
Worcester wing Tom Howe signs a one-year contract extension with the Premiership side.
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An in depth look at Frank Sinatra
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