RP-25 is the NMRA recommended practice for wheel contour, independent of wheel size. It describes angles, fillets, flange contours, and their interrelationships.
Code 110 designates the wheel thickness (0.110"). Code 110 has been the de facto standard in HO for decades, and is now the de facto standard for S scale under NASG--meaning that the S scale wheels are close to prototype fidelity than those in HO. However, it should be noted that HO is slowly adopting code 88 wheels (0.088"), which is very close to being equivalent to code 110 in S. Actual scale profile for wheels in S would be on the order of "code 94" or 0.094", which is close to the P64 standard. Fred T in Tennessee -----Original Message----- From: Jim and Cheryl Martin <[email protected]> To: [email protected] Sent: Fri, Jan 21, 2011 3:09 pm Subject: {S-Scale List} Comparing wheel treads. Guys: This is a simple case of me being too lazy to look it up myself, but in 25 words or less, what's the difference visually and operationally between code 110 wheels and RP25 wheels? Is one more prototypically-proportioned for S-scale? Any operational problems on running RP25 wheels that have been re-gauged to S? Thanks Jim [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
