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Author Topic: “Frog” in turnout  (Read 1417 times)
billyb

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« on: February 17, 2018, 03:59:02 PM »

What is considered the FROG in a turnout.  And why is it called a “frog”?
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Flare

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« Reply #1 on: February 17, 2018, 04:05:08 PM »

The frog is the middle section of a turnout where the two inner rails overlap.

Wikipedia says its name comes from part of a horse's hoof that closely resembles the component.

https://en.wikipedia.org/wiki/Railroad_switch#Frog_(common_crossing)
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bbmiroku

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« Reply #2 on: February 17, 2018, 04:14:10 PM »

I always figured it was called a frog so you can say the word that you want to say (when the train derails) in front of children.

"FROOOOOG!!!!!"
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Maletrain

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« Reply #3 on: February 19, 2018, 08:09:00 PM »

If it had been named in more recent times, when acronyms were in-vogue, maybe it would have been called a TOAD, for Train On Another Direction.  A doubt very many of the acronym guys ever saw the bottom of a horse's foot.
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Trainman203

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« Reply #4 on: February 19, 2018, 08:44:07 PM »

Or “Built For Derailments”.😱😂
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Modeling the New Iberia and Northern 1945
Ckrails

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« Reply #5 on: February 23, 2018, 05:29:55 PM »

Because that's where our trains "jump" the tracks?
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James in FL

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« Reply #6 on: February 23, 2018, 10:11:20 PM »

 Frog = Friggin' Rail Out of Gauge
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Woody Elmore

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« Reply #7 on: March 03, 2018, 01:56:56 PM »

There is no overlap in a frog. Basically, two rails meet at an angle. The frog determines the number of a switch - number 6, 8 , etc. They can be fabricated in a shop or cast. New York's Penn Station is undergoing renovation and the job is taking forever because of all the frogs and points that have to be fabricated.

In addition to frogs, rail joiners are called "fishplates."



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RAM

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« Reply #8 on: March 03, 2018, 07:38:33 PM »

In rail terminology, a fishplate, splice bar or joint bar is a metal bar that is bolted to the ends of two rails to join them together in a track. The name is derived from fish, a wooden bar with a curved profile used to strengthen a ship's mast.
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bbmiroku

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« Reply #9 on: March 03, 2018, 07:45:41 PM »

Fishplates and rail joiners, as far as modelling is concerned are generally two separate things.  Kind of like how all squares are rectangles, but not all rectangles are squares.

If you want to be really detailed, you can go ahead and solder on some wire on the side of the rails between track sections and not use the railjoiners.  Those railjoiners would be fishplates.  But if you go into a hobby shop and ask for fishplates, you may get some weird looks and directions to an aquarium supply store.
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RAM

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« Reply #10 on: March 04, 2018, 10:54:02 PM »

You really can buy ho fishplates.  I don't know if you glue them to the rails or what.  They are for people have a lot of money and time.
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bbmiroku

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« Reply #11 on: March 04, 2018, 11:18:10 PM »

Yuge amounts of time.  I knew they made them for O and up, but I didn't know they made them for HO.  It would probably be cheaper to buy wire, cut it, flatten it, and glue it.  Then put 'rivet' heads on the ends.
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Maletrain

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« Reply #12 on: March 05, 2018, 11:25:24 AM »

They even make fishplates for N scale.  But, they can't be sale thickness. So, putting them on the insides of the rails may cause derailments.  (Putting them anywhere may cause mental issues in this scale.)
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Trainman203

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« Reply #13 on: March 05, 2018, 01:00:24 PM »

Fish plates join prototype rail sections together with bolts.  They used to be every 39’.  Welded rail has done away with a lot of them.  HO fish plates are for people who want extreme realism, especially those who go beyond oversized code 100 rail in favor of better sized code 83, 70, or even 55.  You don’t put them everywhere, just where they really show.

Trivia question- why were historic railroad rail sections made in 39’ lengths?
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Modeling the New Iberia and Northern 1945
Len

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« Reply #14 on: March 05, 2018, 01:33:52 PM »

Trivia question- why were historic railroad rail sections made in 39’ lengths?

Ummmm...So they'd fit on/in a 40' flatcar or gondola.

Len
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If at first you don't succeed, throw it in the spare parts box.
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