Found these short video's on the internet:
http://www.youtube.com/watch?v=G4yht7s-QoI&feature=related (http://www.youtube.com/watch?v=G4yht7s-QoI&feature=related)
http://www.youtube.com/watch?v=GENdvQRgEUI&feature=related (http://www.youtube.com/watch?v=GENdvQRgEUI&feature=related)
Harold
Nice, noisy exhaust on the second run-by.
Did you notice this engine has outside Stephenson valve gear with the usual double eccentrics?