You can see for yourself at: http://www.nmra.org/standards/sandrp/pdf/RP-25%202009.07.pdf
and ... http://www.nmra.org/standards/sandrp/pdf/S-4.2%202010.02.24.pdf The difference between the standard is 0.002 for the flange depth of HO vs. S, but the RP25 for a code 110 wheel is the same as "S"... Don On Jan 22, 2011, at 1:36 PM, Darrell wrote: > RP25 contour is not scale specific. But the flange dimensions, and > to some degree the wheel width, are. Therefore an HO RP25 wheel is > going to have a smaller flange contour than an S RP25 wheel. You > have to pull up the different standards tables for the wheels you're > comparing and check the different standards to see if they will be > compatible. The NASG and the NMRA standards are all available online > if you go to their sites. HO RP25 wheels are going to differ from > BOTH S scale standards, but will be much closer to the Proto64 > standards. > > Darrell > > --- In [email protected], "Tom Hawley" <t.hawley@...> wrote: > > > > ----- Original Message ----- > > From: Darrell > > . . . . . . . . HO RP25 wheels have a smaller contour than S RP25 > wheels. . > > . . . . . . . . . . Hope this hasn't confused you.... . . . > > > > > > > > > > > > > > > > It's probably confused a lot of us, though it probably won't make > much > > difference in our day-to-day modelling. What exactly do you mean by > > "contour"? And which, according to your theory conforms with, and > which > > deviates from the "code 110" dimensions in the NMRA's RP 25? The > various > > codes in RP25 are not scale-specific, except that you have to find > a code > > that works with the S3 and S4 dimensions you're using. > > > > Tom Hawley -- Lansing Mich > > > > > [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/
