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Railroad frog diagram?
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Railroad frog diagram?
Frogs should be bonded in accordance with Figure 8120-1 B =B = Bond in Web of Rail Should be Placed as Close to Body of Frog as Practicable. Learning to read and use wiring diagrams makes any of these repa. It uses the same basic design as the hex frog juicer but has 33 Amp transistors so it can be used with multi. As a part of the railroad switch, it takes the area where two rails cross. frogs 1 1 rbm with plates 2 qty dwg # dwg # 4 "fgp" frog gauge plate 3015 items required for rbm frogs solid manganese self guarded frog. installation **28'-0" spring frog used on new turnout gauge plates see std dwg 1672 switch plates, see std dwg 1625 insulated joint-plug. Special offers for the Huckleberry Railroad are occasionally available to fans of the Crossroads Village and Huckleberry Railroad Facebook page. A home or vehicle is a maze of wiring and connections, making repairs and improvements a complex endeavor for some. Formatted: Normal, Space Before: 8 pt, After: 6 pt, Tab stops: 6", Left The points are hinged at one end and are controlled at the sharp end by a connection rod from the switch stand next to the track. In conventional practice, the tread of the wheel rests on the head of the rail and bears the. AGICO offers railway turnout frogs that are up to the 115RE & 132RE standards in America. It's out with the old and in with the bayou! Mo. In other words, it takes four inches of length for the tracks to separate one inch, you have a No Turnouts are important parts of almost every layout unless it is just a Christmas tree loop. Railway turnout frog is an important key component and necessary to lay focus on explanation. 525 is called a plate frog. The lightning bolts represent a train arriving on the other route and causing a short circuit, the first short occurs with the entry frog and then a subsequent short occurs on the exit frog. The Frog Juicer is an electronic autoreversing device sold by Tam Valley Depot Live frog turnouts require power ("juice") to be supplied independently to the frog with the correct phase to match the route selected. Here are some recommendations for wiring turnouts on a DCC layout. A review of the frog juicer at the RailfanX Blog. Railroad ties play a crucial role in supporting and stabilizing railway tracks. The frog may or may not be live, in the diagram below a live frog version is shown. Understanding Railroad. 5 Different Wheel Diameters 38 inches 28 inches 36 inches. The blue frog rail is tied directly to the blue stock rail. This thin wire attaches to a compact actuator mechanism and is mounted beneath the turnout. A reversing section allows an engine (or train) to enter in one direction, and leave on the same track heading back the way it came. Spring-rail frogs, because of their furnishing an unbroken surface to the wheel treads, are particularly adapted to the heavy traffic of a trunk line 525 and 526 represent the best types of stiff frogs. and include either a spring-rail frog or a rigid, railbound manganese frog, as specified by BNSF Engineering. Next locate the guard rail at close to minimum Check Gage C from the frog rail, and in the relationship specified in RP-13. Alaska cruises are a popular way to vis. Chord Degree of curve is the angle f subtended by a 100 ft Estimating degree of curvature using a 62 ft Guard Rail Frog 16. I also file the end at a 45 degree angle to allow me to solder the wing rail to the frog later. Next came the inside mainline closure rail, which runs uninterrupted from the switch point, through the frog area, to beyond the end of the turnout. Below are step by step instructions for testing your frog along with diagrams. This, the most simple method of all, is to permanently wire all the remaining inner rails to their matching polarity outer (stock) rail. Instead, you connect power to the Frog Juicer and a single wire to the frog, and the Frog Juicer takes care of the rest! Railway-switch operating means. org uses) using SVG, with both JS and Python ports. 525 is called a plate frog. The frog shown in Fig. Railway turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with railway turnouts, including switch rods and gauge plates. Rail Bound and Solid Manganese Frogs 600B-03 Point and Flangeway Dimensions for Manganese Frogs and Crossings. DIAGRAM 3: The Isolated (gapped) or "insulated" (dead) frog method. Have you considered putting short lengths of "insulated" (on one rail) tracks before the point, at the frog ends, controlled via a switch/s on the bottom of Peco motors (if used) or micro switches on the tie-bar etc, the insulated section of track only being live if the point is correctly set for the route, if not the train. The number equates to the length of the run divided by one unit of separation for the diverging routes. The acceptance of the original spring rail frog was slow to catch on, not being adopted by the AE until 1915. It consists of two lines of rails a b and c d (see Fig. JUMP FROG WARNING SIGN MUST BE INSTALLED PER STD DWG 0547. The next rail section to test fitted is the pre-formed frog. Railroad trips offer a uniq. Openings called flangeways are provided in standard frogs so that the flanges on the vehicle wheels can pass through. Frog Guard Rail Settings For Turnouts 13'-0", 19'-6", and 26'-0" Boltless Adjustable Guard Rails - 132 - 141 Lb No. For current users of the Electrofrog or Insulfrog versions of our turnouts the new Unifrog gives modellers the best of both worlds. Progress Rail offers a full line of trackwork, components and fasteners for heavy haul and transit railways, and is a leading manufacturer of specialty trackwork in North America, the United Kingdom and Australia. Railroads of the 1990s explains the history of American railroads through the 1990s. Advertisement Thanks to deregulation, gains. ; Trunk: dorsal zone. each has 3 connectors from top to bottom. 525 is called a plate frog. The dusky gopher frog is small and stout, about three inches long, with warts on its back and a guttural. Some of the most popular methods for controlling frog and reverse loop polarity depend on the shorts created when loco wheels cross a gap that creates a shor. TURNOUTS GENERAL. RP-12 Turnout Dimensions. The number equates to the length of the run divided by one unit of separation for the diverging routes. We have already seen diamonds, OWLS, that allow a low-speed line to cross a high-speed line without putting any gaps in the high-speed line. It can be assembled out of several appropriately cut and bent pieces of rail or can be a single casting of manganese steel. These instructions and illustrations guide you through each step of the drawing. They’re notched for the point rails and spiked down. Turnout Components Section - Free download as PDF File (txt) or read online for free. At the T1 end of the slip, connect the common terminal of changeover Switch 1 to the opposite frog, F1. Frogs should be bonded in accordance with Figure 8120-1 B =B = Bond in Web of Rail Should be Placed as Close to Body of Frog as Practicable. 509-13 Boltless Adjustable Guard Rail. However, there are turnouts where the frog may be solid with the. The switch rod is connected to the points and is pulled back and forth by the switch mechanism which can be either a ground throw (a lever operated manually) or by an electrical switch machine like a solenoid motor. 3. Feb 24, 2023 · Learn everything you need to know about the components of a railroad switch, from the frog and switch point to the switch stand and locking mechanism. Turnouts and Switches. 555-2904 555-2903 description 115 lb. lh jump frog 115 lb. Feed track power to all metal rails in the turnout. The components of railway track play different roles in providing support for trains. Railroad rail dimensions provide a method of identifying types of most rails. So you want to know how to cut railroad ties, include the. These frogs may be flange-bearing in one or both legs of the frog, and may by used either as part of a turnout or as part of a diamond. Here is how I power the frogs on my Atlas code 55 turnouts. The dusky gopher frog is small and stout, about three inches long, with warts on its back and a guttural. The servo is being driven by a MegaPoints ser. The oversized holes provide a loose fit for the bolts. As a part of the railroad switch, it takes the area where two rails cross. On a traditional tread-bearing frog, the flangeways - gaps in the rail - allow the routes to cross over each other, producing that "clickity-clack. copart raleigh fotos (Metrolinx photo) A standard railroad frog is a mechanical structure that enables train wheels to cross from one track onto another. Railroad frogs got their name by allowing trains to move across a separate set of tracks without any hiccups by utilizing a type of rail that resembles the bottom of horses hooves. The lightning bolts … The image below shows the electrical working of an electrofrog turnout in both positions. First, I solder three feeders to the turnout: one for each rail (black & red) and one for the frog (green). In this informative guest post, we’ll dive deep into the world of railroad frogs, exploring their purpose, design, and the crucial role they play in modern rail systems. Railroad frog is a kind of equipment that makes the train wheels across from one track to another. Reversing sections include: Wyes or triangles, turntables, and reversing loops (balloon tracks). DIAGRAM 3: The Isolated (gapped) or "insulated" (dead) frog method. Railroad rail dimensions provide a method of identifying types of most rails. The pink blotches are where there would need to be insulated rail joiners or gaps in the rail The red wire is from the hot frog to the tortoise lug #4 Blue and yellow are track power. We have already seen diamonds, OWLS, that allow a low-speed line to cross a high-speed line without putting any gaps in the high-speed line. Mar 26, 2024 · In the case of the lift-frog turnout, the first pieces of rail to go down are the stock rails. clorox 1 inch chlorine tablets Discover the functions, types, and maintenance of each component to ensure safe and efficient railway operations. However, the "dead" frog is a Potential Stalling point for a short wheelbase. This optimization, our Partial Flange Bearing Frog, is a hybrid of a conventional self-guarded frog and a pure flange bearing frog. Shorts may occur if a metal wheel's tread bridges the gap between the switch and stock rail. Railway Turnout Frog. 525 is called a plate frog. Here's how to plan an unforgettable trip. atch the route andyou will have p. To use the library, include railroad. vangaurd guard rail gauge plate kit 3 2 7 0 a file no. This, the most simple method of all, is to permanently wire all the remaining inner rails to their matching polarity outer (stock) rail (stock) rail. The upper rail of the frog moves when a wheel goes through. Model railroading is a beloved hobby that allows enthusiasts to create intricate miniature worlds. Atlas turnout wiring diagramConnector atlas diagrams turnouts dcc wire colour hitch loom Wiring model railroad switch diagram switches hobbyist track train momentary layout should knows actually something need some whoMartin's model railway: layout wiring, including preparing turnouts. It can be assembled out of several appropriately cut and bent pieces of rail or can be a single casting of manganese steel. one bedroom apartment in queens for dollar800 This will limit the dead. the detector outputs will connect to the usc circuit board "in a" and "in b". As a part of the railroad switch, it takes the area where two rails cross. Railway turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with railway turnouts, including switch rods and gauge plates. The frog shown in Fig. Rail Bound and Solid Manganese Frogs 600B-03 Point and Flangeway Dimensions for Manganese Frogs and Crossings. Rail peco electrofrog insulated joiners track railway points switch frog closure diagram tracks curved module bob tips building set routePeco electrofrog turnouts Peco way electrofrog wiring diagramWiring the peco electrofrog turnout my way Turnout Frog Types Check Details [DIAGRAM] Railroad Crossing Wiring Diagram - MYDIAGRAM Rail section dimensions mainly contain the rail height, the width of the base, the width of the head, the web thickness, the depth of head, the depth of the base, nominal weight per yard or meter. The crossing is the component that enables passage of wheels on either route through the turnout. Understanding Railroad. Railway turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with railway turnouts, including switch rods and gauge plates. And because a turnout is comprised of several parts they all hav. Discover the functions, types, and maintenance of each component to ensure safe and efficient railway operations. Apr 12, 2024 · In this informative guest post, we’ll dive deep into the world of railroad frogs, exploring their purpose, design, and the crucial role they play in modern rail systems. From PECO: The wiring of these new turnouts is a development of both the Insulfrog and Electrofrog designs. js module in your script, then call the Diagram () function. There is a great deal of mystery and misconception about just how a frog point actually works.
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If you know anything about horses you will know that there is a sort of V shape on the bottom known as the frog. JUMP FROG WARNING SIGN MUST BE INSTALLED PER STD DWG 0547. --Randy CSX rail, intermodal and rail-to-truck transload services - CSX. Regarding the external parts of adult frog anatomy, we can find the following important structures which are also shown in the diagram below: Head: where the eyes and nasal cavities are located. This wire must be green because it’s a variable wire able to change polarity. It can be assembled out of several appropriately cut and bent pieces of rail or can be a single casting of manganese steel. These sturdy wooden or concrete beams are used to support the rails and keep the. We have already seen diamonds, OWLS, that allow a low-speed line to cross a high-speed line without putting any gaps in the high-speed line. If you know anything about horses you will know that there is a sort of V … A swingnose crossing or moveable point frog is a device used at a railway turnout to eliminate the gap at the common crossing (aa. Feb 24, 2023 · Learn everything you need to know about the components of a railroad switch, from the frog and switch point to the switch stand and locking mechanism. Progress Rail offers a full line of trackwork, components and fasteners for heavy haul and transit railways, and is a leading manufacturer of specialty trackwork in North America, the United Kingdom and Australia. Apr 12, 2024 · In this informative guest post, we’ll dive deep into the world of railroad frogs, exploring their purpose, design, and the crucial role they play in modern rail systems. Railway Turnout Frog. The frog meets AAR plate "C" equipment diagram for above rail clearance. requirements or optimized with flange bearing properties and tapered rail connections to increase component life. Advertisement Frog crafts and activities for kids. Learn about the history of railroads of the 1990s. gel foam Page 8 SECTION 3 - Steel Tie Turnout Materials and Assembly 3. This, the most simple method of all, is to permanently wire all the remaining inner rails to their matching … Learn everything you need to know about the components of a railroad switch, from the frog and switch point to the switch stand and locking mechanism. be free from surface defects greater than 1 mm deep; any 3 m length;have gauge faces that are smooth and free of metal flow;not have excessive top wear. If you’re in need of high-quality images of frogs, look no further. A short occurs when the wheel bridges both rails and the command station/ booster shuts down Progress Rail Services. The diagram below shows how to wire up a live frog crossing (e, a PECO Electrofrog Diamond Crossing) with an auto reverser feeding the frogs. Jan 20, 2022 · Flange-bearing frogs explained: On a flange-bearing or lift frog, like this one on the diamond at Ridgley Tower, Springfield, Illinois, the main high-speed route crosses the diamond on a solid rail, while the secondary, low-speed route crosses over on its wheel flanges. Z-HO/On30 lowest cost per frog 2 1 2 or 4 Amps selectable. All the details and opening date for Disney's new "The Princess and the Frog" attraction coming to Walt Disney World and Disneyland. The frog is a component of special trackwork where one rail crosses another. Have a look and choose what you need now. The switch rod is connected to the points and is pulled back and forth by the switch mechanism which can be either a ground throw (a lever operated manually) or by an electrical switch machine like a solenoid motor. 3. A PERMANENT MARK IS TO BE PLACED ON THE CASTING AT THE 1/2" POINT OF FROG. Female Reproductive System of the Frog Labeling (BW) 16 A railroad frog, also known as a "common crossing," is a vital component of a switch, the mechanism that allows trains to transition from one track to another. (CSX) produce a sectorwide slide on WednesdayCSX CSX Corp. newscow wellington ks 5" Spring Wire controlled turnout operations. Mar 26, 2024 · In the case of the lift-frog turnout, the first pieces of rail to go down are the stock rails. Railway turnout frog is an important key component and necessary to lay focus on explanation. Discover the functions, types, and maintenance of each component to ensure safe and efficient railway operations. Railway-switch operating means. mainline rail heel casting toe casting manganese item no. The frog shown in Fig. The frog may or may not be live, in the diagram below a live frog version is shown. It sits on my desk as a fidget toy. Their teeth are used mostly to keep back their prey. A PERMANENT MARK IS TO BE PLACED ON THE CASTING AT THE 1/2" POINT OF FROG. These are also used for high-speed passenger transport. Shorts may occur if a metal wheel's tread bridges the gap between the switch and stock rail. Spring-rail frogs, because of their furnishing an unbroken surface to the wheel treads, are particularly adapted to the heavy traffic of a trunk line 525 and 526 represent the best types of stiff frogs. For more definitions of common model railway terms, see my model railway jargon guide. 590-03 Diagram Illustrating Preferred Names of Parts for Guard Rails. Railway Turnout Frog. The points where the insulated joiners are used are called gaps One way of wiring a railroad is called common rail. Welcome to Railroad Diagram Generator! This is a tool for creating syntax diagrams , also known as railroad diagrams, from context-free grammars specified in EBNF. Shorts may occur if a metal wheel's tread bridges the gap between the switch and stock rail. two bed rent wolverhampton I also use a file to sharpen the frog point, if it's blunt, so that wheel flanges will clear it. Power is fed to the rails on the point end of the turnout. Frog consists of two point rails, two wing rails, two guard rail (also named check rail), tie plate, blocks, other accessories and etc. The frog (left) and guard rail (right) of a switch. Located at the point of. On Peco Code 100 points there is a link wire which, when cut, will separate the frog from the rest of the point, hence my earlier statement that the Peco Code 55 points do not have the link wire referred to in the referenced instructions. It can be assembled out of several appropriately cut and bent pieces of rail or can be a single casting of manganese steel. Turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with turnouts, including switch rods and gauge plates. Apr 12, 2024 · In this informative guest post, we’ll dive deep into the world of railroad frogs, exploring their purpose, design, and the crucial role they play in modern rail systems. Railway turnout frog is an important key component and necessary to lay focus on explanation. What does it take to move a train into a siding? Railroad buffs everywhere. Discover the functions, types, and maintenance of each component to ensure safe and efficient railway operations. HEX BOLTS, FLAT WASHER, AND HEAVY HEX SECURITY NUTS. These frogs may be flange-bearing in one or both legs of the frog, and may by used either as part of a turnout or as part of a diamond.
AGICO offers railway turnout frogs that are up to the 115RE & 132RE standards in America. 1 switch rod or head rod. It is also called the “common crossing”. The opposite turnout rails can then be slid back into the remaining ties. chime cash deposit locations They’re notched for the point rails and spiked down. The frog (left) and guard rail (right) of a switch. The points control which way the train will go. The frog is a component of special trackwork where one rail crosses another. Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in tracks,. A connection is then made through one pole of the switch from each rail to the frog. mlive saginaw The Micro Engineering Ladder Track System (LTS) is a series of five different HO #5 turnouts. The SPREAD is 2y; and N = x/2y. Advertisement Picture this frog jumping from its li. The frog is a component of special trackwork where one rail crosses another. Have a look and choose what you need now. No mainline guard rail is necessary. Depending upon wear profile, wheels traverse the frog in either tread or flange bearing mode. Diagram 1. hloe vevrier 5" Spring Wire controlled turnout operations. As a part … Flange-bearing frogs explained: On a flange-bearing or lift frog, like this one on the diamond at Ridgley Tower, Springfield, Illinois, the main high-speed route crosses the diamond on a solid rail, while the … Spring-rail frogs, because of their furnishing an unbroken surface to the wheel treads, are particularly adapted to the heavy traffic of a trunk line 525 and 526 represent the best types of stiff frogs. Railroad frogs got their name by allowing trains to move across a separate set of tracks without any hiccups by utilizing a type of rail that resembles the bottom of horses hooves. All About Turnouts are sections of track that allow trains to travel from one line of track to another. Atlas Controller Model Railroad Electrical Accessory #220. The skin is kept moist thanks to glands located throughout the dermis that secrete watery mucus. The frog's skin consists of two layers: the dermis (the deepest layer) and the epidermis (the outer layer). The acceptance of the original spring rail frog was slow to catch on, not being adopted by the AE until 1915.
Read the review in the February 2010 Model Railroader. either side of the rail and clean separations average well under two minutes. The total length from point of switch to the frog is the same in both cases, as is the frog angle Low Entry Angle-5-4-3-2-1 0 0 30 60 90 120 150 Distance along straight route (ft) Gauge direction dist. wall slope made 1 in 10 (or even up to1 in 40) in lieu of 1 in 5, to increase the amount of casting supporting the wheels, and marginally to. Apr 12, 2024 · In this informative guest post, we’ll dive deep into the world of railroad frogs, exploring their purpose, design, and the crucial role they play in modern rail systems. , Zimo, MRC, Atlas, KAM". Wiring Diagram for the Peco 3-Way Insulfrog High Quality Railroad Tools backed by an expert staff with excellent customer service! We can help! Call today (888) 510-3623 or (513)-533-7070 Spring Frog Inspection Kit; Switch And Crossing; Frog Flangeway Gauge; Radius; Thermite Welding Gauge; Frog Point Conformal Gauge; Frog Straight Edge And Ruler; Image of a jump frog, which is a piece of track infrastructure. Live frog crossings and slips are different, there will be an electrical connection between the two routes. Today, as one of North America's leading rail products suppliers, Harmer maintains a large inventory and Another type is a spring frog. We keep a full inventory of 51 A stands and components for quick shipping. It is also called the "common crossing". The switch rod is connected to the points and is pulled back and forth by the switch mechanism which can be either a ground throw (a lever operated manually) or by an electrical switch machine like a solenoid motor. 3. The track structure is built for rolling stock to roll upon safely and smoothly. Learn about the history of railroads of the 1990s. Crossroads Village and Huckleberry. Feb 19, 2009 · There is a great deal of mystery and misconception about just how a frog point actually works. #8 bolts with nylok nuts are used for the final connection. The acceptance of the original spring rail frog was slow to catch on, not being adopted by the AE until 1915. 88 box chevy caprice for sale Feb 24, 2023 · Learn everything you need to know about the components of a railroad switch, from the frog and switch point to the switch stand and locking mechanism. Calculate the frog number ("N") Visualize a line of symmetry through the center of the frog with the rails diverging on either side of that line. Aug 29, 2020 · A railroad frog is a device that helps the wheels rolling from one track to another. While the guard rails are plastic, the frog is metal. Unlike dead frog points where insulated rail gaps are not normally essential, live frog points and associated track do require a bit of forethought before finally pinning everything down not on whether it is the furthest or nearest away rail. I use Peco Code 55 electrofrog points and lay them straight out of the box, with the addition of a wire soldered to the frog assembly powered from the switch on a SEEP PM-1 motor (belt and braces method). Understanding Railroad. Configurations Frog gauntlet (double-gauntlet-double) Gauntlet tracks can be used to provide horizontal clearance to a fixed obstruction adjacent to a track such as a cutting, bridge, or tunnel. Both man and the frog have the same kinds of organs and systems of organs. The Frog Juicer is an electronic autoreversing device sold by Tam Valley Depot Live frog turnouts require power ("juice") to be supplied independently to the frog with the correct phase to match the route selected. The diagram below shows how to wire up a live frog crossing (e, a Peco Electrofrog Diamond Crossing) with two juicers feeding the frogs. Don't be stuck with a non-operational switch stand, most 51 A replacement parts can ship today. When you first hear about the Underground Railroad, it’s easy to imagine stations and subways in a system of tunnels below a city. vangaurd guard rail gauge plate kit 3 2 7 0 a file no. On Peco Code 100 points there is a link wire which, when cut, will separate the frog from the rest of the point, hence my earlier statement that the Peco Code 55 points do not have the link wire referred to in the referenced instructions. rt worn rail may be used for turnouts, switches and crossings man Part wo. The total length from point of switch to the frog is the same in both cases, as is the frog angle Low Entry Angle-5-4-3-2-1 0 0 30 60 90 120 150 Distance along straight route (ft) Gauge direction dist. k) for the track power to the blue and red rails Switch railway turnout turnouts crossings components railroad track rails rail switches frog diagram parts tracks types cross closure work pointEnergy harvesting applications: railroad track switch parts Turnout wiring guideRail switch makes trains change tracks safely. 1. Frog consists of two point rails, two wing rails, two guard rail (also named check rail), tie plate, blocks, other accessories and etc. From PECO: The wiring of these new turnouts is a development of both the Insulfrog and Electrofrog designs. boat for sale by owner craigslist Openings called flangeways are provided in … A frog in model railways is part of a point/turnout (a section of track that moves trains from one track path to another) where the rails meet. A railroad frog is a device that helps the wheels rolling from one track to another. It can be assembled out of several appropriately cut and bent pieces of rail or can be a single casting of manganese steel. Although many terms are uniform across different nations and companies, they are by no means universal,. ; Load Distribution: Sleepers distribute the weight of the train evenly, preventing excessive pressure on the underlying ballast. INFORMATION #10-1: A Very Brief Introduction to Block Detection. Contacts on switch rails and connections to the closure rails. Turnouts and crossovers, including switches, frogs, guard rails, stock rails, and closure rails; rail fastening assemblies unique to turnouts; and miscellaneous components associated with turnouts, including switch rods and gauge plates. Atlas Signal System Basic Operation Manual - N, HO & O Scales (2019) Atlas Signal System Advanced Operation Manual - N, HO & O Scales (2019) Interlock Control Module Instructions. Closing date, reopening date for restaurant, Tiana's palace. Insulated rail joiners are a must on the ends of the frog rails. As a part of the railroad switch, it takes the area where two rails cross. The switch stand body and targets are white metal castings. Because if the jumpers or gaps aren't configured correctly, it woudl otherwise be a dead shortif the ponts were lined so rail A powers the frog through the not-cut jumper, and the Tortoise contacts connect it to rail B. Using a jeweler's file, I bevel the inside of each point to a flat knife edge against the stock rail.