BTW- the model appears to be of QJ0001, not 8001. 8001 looked fairly conventional apart from the "oblong ejector" (an unlicensed Chinese copy of the patented Giesl ejector) and some ductwork around the firebox sides. Wardale was so disappointed by the failure of his efforts in China I don't believe he took any photos of 8001 and preferred that no one else take photographs of it either!
Wardale was hired by the Datong Works in the late 1980's (?) to devise improvements for the QJ. He prepared complete construction drawings for a "QJ2" locomotive which was unfortunately never built. It would have had all roller bearings (axles and rods), improved superheat, GPCS firebox, triple Lempor exhaust, improved valves, and a host of other improvements. After spending over a year on this effort, Datong dropped the project without building anything. Apparently the only physical results of this year-long project were QJ8001 and several pallets of brand-new very expensive imported SKF roller bearings purchased for the QJ2 prototype.
I should note that Wardale found that the GPCS on 8001 didn't seem to work very well with Chinese coal. Their coal was of fairly low BTU value and tended to be practically pulverized by the time it made it to a locomotive tender. Based on the accounts of the experiments with 8001 in Wardale's book, Porta wrote an entire detailed technical paper on relatively minor changes that could be made to the GPCS to optimize its performance with even Chinese coal.
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