Frog types

[big daydreamer]

When and where do railways use manganese frog inserts instead of regular frogs or bolted rail frogs?  

I noticed Details West and Proto:87 Stores had a selection of frogs products with these various descriptions. Regarding these products, does anybody have experience using them and how well they operate with regular wheelsets and code 88 wheelsets?

Thanks

[gmpullman]

Here is a link to a discussion of same...

http://cs.trains.com/mrr/f/11/t/225254.aspx

As far as proto 88 I can not comment as I use the stock Shinohara and Atlas frogs.

I would surmise that the manganese frog was used where high speeds and high density traffic warranted their use and bent/bolted rail was used in secondary and yard applications.

Hope this helps, Ed

[big daydreamer]

Thanks for the link 

[dknelson]

gmpullman

I would surmise that the manganese frog was used where high speeds and high density traffic warranted their use and bent/bolted rail was used in secondary and yard applications.

Ed   

And yet during a ride the other day on the Union Pacific line out of Butler Yard in Milwaukee (It was an Operation Lifesaver train using UP's passenger cars), I saw the manganese frogs in the yard but not out on the mainline (of course I could not see the main we were on, so what I was seeing were remains of former double track now used as passing sidings -- as Ed says, secondary trackage).  I assumed that the turnouts I saw out on the main were infrequently used industrial sidings, whereas if they had to replace a frog in the yard itself that could seriously disrupt normal operations.  So perhaps it was only key yard throat type turnouts in the yard that have the manganese frogs, but nonetheless, they were definitely used often in the yard.

Dave Nelson

[7j43k]

So I typed in "use of manganese frog" and got this and that.  

Here's "this":

 

You guys can go look up "that", 

Ed