Hi JohnP, Thanks for your reply to my query. I'm glad that it isn't just me that cannot get the pages of the on-line encyclopedia to work properly. If they have just scanned the pages, there ought to be a page with all the diagrams on it, but I cannot see any reference to it. I like the reference to Eric Morecombe - that was the sketch with "Andrew Preview" in it, wasn't it? The book that you mention sounds interesting, but how can someone write a complete book on valve gears and not talk at length on the diagrams which analyse them? The hunt goes on. Cheers, Roger Mason, in St. Agnes. John Pagett wrote: >Roger, > >I've just had a look at the link- >(http://encyclopedia.jrank.org/SOU_STE/STEAM_ENGINE.html), > >It seems to me that the article was scanned but not proof read - it >certainly appears that tables from the original document have come out >something like Eric Morecambe's piano playing - (All the right notes were >there, but not necessarily in the right order (sunbeam)). I too couldn't get >the links to work properly. > >"Valves and Valvegears for Locomotive " republished by TEE as ISBN 0 905100 >36 0 has a few examples of Zeuner diagrams, but does not cover the Reuleaux >diagram. In fact, I'm not certain of the correct spelling - is it "Reau.." >or Reu.."? > >The internet seems trangely silent when searched.... > >JohnP > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.