Strange Frog

[trainboyH16-44]

I was on a little used branchline the other day, with 90 Pound per yard rail from 1914, and I saw a frog that only had a flangeway on one side, the mainline side. It was in a turnout that went from the main to a chemical plant with 2 tank cars in it, and a derail in front of the main. It was like this on both ends of the siding. What was going on with that frog?
Trainboy

[dehusman]

Probably a "spring frog". When a wheel goes down the diverging side, it pushes the rail away from the point of the frog, opening up a flangeway.

Dave H.

[BR60103]

It's not common on little used lines. The idea is that the main line, usually high speed or high traffic, will have a continuous support through the frog. If the line is less used it usually doesn't get an expensive contraption like that.

[Anonymous]

What is an adjustable frog used for?

Down here in the lower 40, it's not a good idea to go anywere near any tracks.

What's the Great White North like this time of year fellas, eh?

I wish my granddad didn't move away from there a century ago.

"Keep your stick on the ice!"

[dinwitty]

Another frog curiousity to watch for is the guardrailless frog, which has small extensions on it to hold the wheel in place while crossong the frog.

[trainboyH16-44]

QUOTE: Originally posted by gsetter

What's the Great White North like this time of year fellas, eh?
"Keep your stick on the ice!"

The Great "White" North only has 3 inches of snow, and the server is going down in one minute.
Trainboy

[dehusman]

A "guardrailess" frog is called a self guarded frog.

Dave H.

[trainboyH16-44]

Another thing about this line was that it had a 20MPH speed limit and the town was only about 10 miles from the end of the line, which was about 30 miles long.
Trainboy