Hi guys,
I have converted to 1:48 O-scale and have a question regarding the turnout #5 size. Does anyone know the correct "lead" lenght (point of switch - point of frog), i'm handlaying all of the track and turnouts.
I have a printed paper mock up but i don't know if it is to the actual scale.
Thank you !Peter
"One difference between pessimists and optimists is that while pessimists are more often right, optimists have far more fun."
NMRA RP-12 has these dimensions. It's available on-line:
https://www.nmra.org/index-nmra-standards-and-recommended-practices
Ed
you may be interested in Variations in Turnout Dimensions i wrote when trying to better understand turnout dimensions
the table below reports prototype lead lengths, "frog distance", 47.1 ft for a #5, which scales to 11.775" for 1/48
greg - Philadelphia & Reading / Reading
Guys, thanks for the info !
I have printed the Fast Tracks papers but in 3 pieces and glued together, so i was not sure of the correct lenght. And my frog was not the same as in the printout, so... why not get the correct measure to begin with and then the rest will fall into place.
From gregc's information the length is: 0.299085 meters (299mm)
Problem solved, sweet!
Thanks! Peter
Very nice article, Greg!
The length for an NMRA specced switch is .2688 meters, for comparison.
ScandinavianFrom gregc's information the length is: 0.299085 meters (299mm)
That 0.000085 of a meter is only about three one-thousandths of an inch, less than a human hair.
Is that kind of precision nesessary for turnout length?
I am never going to measure it.
-Kevin
Living the dream.