Hi Andy I've just been looking through some of my technical books and it seems the LMS may have been unique in using hollow piston heads - anyone else care to comment? Presumably this was done to reduce the reciprocating mass. Regards Ron ----- Original Message ----- From: "Andy A" <AndyA@xxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Saturday, March 05, 2005 2:17 AM Subject: [modeleng] Re: Tall Tales? > Hi Barrie > Not all piston heads are hollow, the LNER preferred a one piece forged > head > and rod. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.6.2 - Release Date: 04/03/2005 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.