tag:blogger.com,1999:blog-5939045425833649695.post2258407292084906464..comments2024-02-22T11:08:00.644-08:00Comments on petesworkshop: HR123 Loch Class 4-4-0 ProgressPete Armstronghttp://www.blogger.com/profile/14347883450230646782noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5939045425833649695.post-88687151320066240692016-09-25T03:14:01.034-07:002016-09-25T03:14:01.034-07:00This comment has been removed by the author.Pete Armstronghttps://www.blogger.com/profile/14347883450230646782noreply@blogger.comtag:blogger.com,1999:blog-5939045425833649695.post-22214080533693590942016-08-30T00:41:05.917-07:002016-08-30T00:41:05.917-07:00Based on my friend Trevor Nunn's experiences w...Based on my friend Trevor Nunn's experiences with inside motion, I would say that modelling working Stephenson's valve gear is not really worth the effort: except when in full gear, there is very little movement of the valves and unless the frames are very open, it won't be seen. (Joy's gear is, well, a joy to watch.) it might be worth considering putting in slidebars, and if you want to go that far, to have moving cross heads. You could always copy Jas Millham's technique of driving them from eccentrics to aoid the need for a crank axle. It halves the amount of motion, true, but this is about getting some visible movement between the frames.<br /><br />Just a thought,<br /><br />SimonSimon Dunkleyhttps://www.blogger.com/profile/14524485143477411155noreply@blogger.com