It is. A #9 frog is 6deg 22min 02sec. A 1 in 9 is 6deg 20min 25sec.
--- In [email protected], "Gavin" <csowry@...> wrote: > > ..or is it 2 (tan 1/12 + tan 1/12), must look up the ARA specs. > > --- In [email protected], "Gavin" <csowry@> wrote: > > > > The British actually use 'straight' frogs, just like in USA, and here in > > NZ. It is the Germans, and some other European railways that use curved > > frogs. > > > > There is a difference between British/NZ and USA in measuring the frog. The > > geometric angle of a US #6 frog, say, is not the same as a British 1 in 6 > > frog. > > > > Off the top of my head, the British formula is tan 1/6, whereas the > > American is 2 tan (1/12 + 1/12). > > > > --- In [email protected], "Ed" <Loizeaux@> wrote: > > > > > > > Only "toy trains" have a curved frog. > > > > AbBaird > > > > > > As a general statement for American railroading that is true. However, > > > in England most real turnouts are made with a curved frog. My NYC-themed > > > layout has almost all curved frogs (and curved adjacent rails) because I > > > use White Oak Models turnouts sold by Kelvin White who lived in Oxford at > > > the time. Even though they are technically incorrect for the NYC and > > > other American railroads, I like them because the longer continuous curve > > > equates to a much larger "real" radius than the typical American design > > > with straight points/curved closure rail/stright frog/curved rail past > > > the frog. Thus, I find it much easier to ease the 4-8-4 Niagara and > > > other 8-coupled wheeled steamers through a #6 turnout in the yards. Ken > > > Reiter's SP 2-10-4 also goes through a #6 turnout of this type easily. > > > Yep, bending the rule once in a while pays off. Cheers....Ed L. > > > > > > ------------------------------------ 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/
