> Hi All, When discussing with a friend we had this question ( may seem crazy to the most experienced of You), for which we found no reliable answer, how to calculate (estimate?) the running speed of a steam engine (RPM) knowing the type of engine (single/double acting, condensing/non condensing), the stroke,the bore and the inlet steam pressure ? For your info we are building an horizontal slide-valve steam engine 1 1/2 bore, 2 1/4 stoke , of a type inspired from an old design . > I thank you for your help and the infos you can forward .... > Regards > > pierre.courbouleix@xxxxxxxxxx > Pierre pierre.courbouleix@xxxxxxxxxx This e-mail is intended for the adressee(s)only and may contain info that is the property of, and/or subject to a confidentiality agreement between the intended recipients.If you have received this e-mail in error, please contact the originator of this e-mail via e-mail and delete copies from your computer or network. Misuse of the content of this e-mail message may violate the Laws of your Country 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.