At near CP SA120 near Flatonia TX, there is something called a "jump frog"? What is a "jump frog"?
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I think it's a switch frog on which the valley on the inside gauge of the rail is higher than normal so that the cars wheel rides across the frog on the wheel flange so the normal wheel surface does not ride on the top of the rail. I have read something about this in some railroad mag a few years ago. But then I could be 100% wrong.
This is a related topic, rail crossing without flangeway grooves on one route:
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Wow. Ace looking at that, makes one wonder why a train running east to west (rght to lft...or vice versa) does not just ride up and derail when it hits that section!
The magic of physics?!
Greg
What made a VERY big difference to our mainline was the installation of "Spring Frog"(s). They really smoothed the ride over switches going to industries. Read more about them here: http://www.narcoa.org/info/safety/springfrogs.pdf
Originally Posted by cngw:
Wow. Ace looking at that, makes one wonder why a train running east to west (rght to lft...or vice versa) does not just ride up and derail when it hits that section!
The magic of physics?!
Greg
Speeds are kept slow for the route where wheel flanges climb over a rail, and at other parts of the crossing wheels are restrained by fairly tight flangeways.
