I also play with 1:1 scale........ (which I should be doing now, instead of 'S'urfing!)
--- In [email protected], "pickycat95" <pickycat95@...> wrote: > > Now if I think about it... > > tan(1/9) = 6.34 degress and tan(1/18) + tan(1/18)= 6.36 degrees for those who > aren't surveyors. That means the divergence ratio is 1:8.97 > > Hmmm... 0.2 degrees and .03 sure slices the baloney thin at 3/16" scale. I'm > sticking with 1/N where N is the number turnout for my divergence ratio. > > At 1:1 scale this could become quite serious. > Ben Trousdale > > --- In [email protected], "Gavin" <csowry@> wrote: > > > > 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/
