Hi Peter and All, 10mm sounds about right to me as if it is too large you cannot vibrate and tamp it properly to get the track levels correct. Regards Clif ----- Original Message ----- From: "The Sheppard Residence" <peter@xxxxxxxxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Sunday, November 14, 2004 1:38 PM Subject: [modeleng] Ballast > > All, > > I will be ordering some ballast for the Lackham Museum and Woodland > Railway tomorrow (7.25", heavy duty rail). My source is a local quarry > who have offered to me on very generous terms. > > I have been offered some 10mm ballast (that's the true scale size), but > it seems a little small. I can get larger if I ask. > > The bed will be 4" deep 8" wide and lines with a permeable membrane. > When the track is laid a further 2" depth will be placed around the > sleepers to hold the track in position. > > So, is 10mm too small? What size have others used on their railway? > > Regards > > Peter > > 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. 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.