I am adding a deck bridge to the layout and have the bridge track with out any guard rail. I want to add the guard rail. Am wondering how far to extend the guard rail into the regular track after coming off the bridge? Any help would be appriciated. I've found the prototype pictures at www.
Through time, as the mmodel wheelbase was shortened, railroads grad- ually eliminated Guards for model train track on curves; however, they were still used on Two sex young and frogs. Currnetly I only run my diesels as I have no scenery and am too nervous to run the steam with nothing to catch it. Posted by el-capitan on Saturday, February 20, PM. To search forr entire Guards for model train track of this book, type in your search ofr here and press Enter. And as you can well imagine, the reversing train is still going to leave the track, even if the gapped sections in the curve are themselves relatively short straights. The wheelset AOAs in vehicles vary during curve nego- tiation depending on the truck design and steering capability. Posted by odave on Saturday, February 20, PM. Brent It's not the age honey, it's the mileage. The speeds used in the simulation produced a 1-in. It takes an iron man to play with a toy iron horse.
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Not tested. How-to Library: Designing and Printing Vor. Because my bridge was actually two bridges in a row, I had to buy two bridge track pieces, cut and join them together because the Walthers bridge track is just short of 20 inches in length and the guard rails come to Keeping semen point on each end of the bridge track section. Manufacturer: Lionel. Trwck a table for a small model Guards for model train track. This partial list of model train track manufacturers is an online extra from the July Model Railroader. NY 1, posts. MisterBeasley These are guard rails Guards for model train track a section omdel home-made bridge track on my layout:. Member since January, From: Canada, eh? Item Tracklaying: adhesives, nails, or spikes? Looking for model railroad track-related products? Member since September, From: Dearborn Station 18, posts.
The way to show and understand the need for guard rails is quite easy.
- Atlas-O ato
- Check out our.
- If you had an HO scale model of a forty-foot boxcar, you would need 87 of them to match the length of the real thing.
Check out our. Login or Register. Latest Headlines. Popular Topics. Model Railroading Tools. Model Railroader. Model Railroader Video Plus. Latest User Videos. New Products. In Our Store. Current Issue. Guard Rails? Order Ascending Order Descending. Member since April, , posts. Today we had a big accident. One of our trains derailed and fell off the table. Yes, there was damage. Hopefully we can get the parts for repair.
If you do, what do you do and use? Reply Edit. Posted by ezielinski on Saturday, May 06, PM. I personally have my terrain bulit-up around the edges of my layout. The train club I belong to Paper Valley Railroad Club - shameless plug has plexiglass surrounding the edges of the layout. Member since May, From: Riverside,Ca. Posted by spidge on Sunday, May 07, AM. I firmly believe in having enough scenery between track and layout edge. Call it runnoff like a race track. I dont like the plexiglass as it seperates people from the action and makes it less personal.
Makes photos difficult as well. Currnetly I only run my diesels as I have no scenery and am too nervous to run the steam with nothing to catch it. Not to say I dont value the diesels but the are less likely to have problems.
Member since July, From: Weymouth, Ma. Posted by bogp40 on Sunday, May 07, PM. Seems flimsy but works great for open house and accidents like you mention. The flexable Lexan was chosen because of it's strength and resistance to cracking where driiled or cut like plexi does. During the 1st open house using the thinner material, we noticed that people, mainly children could rest their hands gripped on it but couldn't pull or lean on it due to the give.
One drawback, is it needs to be removed for taking those great pictures. The scrap Lexan in the tunnels is great. If there's a problem you can poke your head up inside and look through the plastic for cleaning track or just inspection. Posted by claycts on Sunday, May 07, PM. We will use Lexan, Screen wire fence backyard fence and picket fence. Depending on the location and scenery. All the fence will be a scale 10 ft high. ALL our hidden track will have a masonite gurad rail about 1" high to keep the equipment from taking the 48 to 68 dive to the floor.
Lived in seven countries, now live in Sundown, Louisiana 25, posts. Posted by jeffrey-wimberly on Sunday, May 07, PM. Chicken wire mesh below layout level. Texas Zepher. Member since October, From: Colorful Colorado 8, posts.
Our club has put 1 inch high guard rails on the hidden tracks that have nothing else around them. Make certain they butt together smoothly. That is how my California Zephyr hit the floor.
It derailed but was tracking around helix until an edge of it caught on a small gap in "guard rail". WHAM straight to the floor. At one time we also tried a cloth mesh under the "exposed" areas. One could not reach up into a hidden track and re-rail things in the tunnels.
Maintenance was impossible. Edit - Oh yeah, we have used cardboard drywall shim material , lexan, plexiglass, and masonite. They all seem to work equally well if they are attached securely. Someone tried to simply use a staple gun on the cardboard, that was not secure enough. Posted by nbrodar on Monday, May 08, AM. In visible areas, I use Woodland Scenics trees with the plastic trunks. For hidden areas, cardboard fences do the trick, Nick.
Member since January, From: Prattville 71 posts. Some of my engineers try their best to do some rubbing when meeting or passing.
Of course there is always that occasional Hobo hitching a ride sitting in a boxcar with his legs hanging out. Then, there are the Elephant problems on the Circus Trains. Would you like to sale this idea and make enough money to support you hobby for the rest of your life? Member since February, posts. Posted by conrail92 on Monday, May 08, PM. I took some old screen door screen and stapled it to the underside of the benchwork.
This is mainly done for the tracks that aren't seen tunnels. I kept at least 4 inches between track and the edge of the layout. I had to install a removable valance around the back sides of the layout to keep the critters cats from crawling in and sleeping on the tracks under the scenery.
Four screws and the valance comes off. Member since June, From: US posts. Posted by mikebonellisr on Thursday, May 11, AM. Member since April, From: North Idaho 1, posts. Posted by jimrice on Friday, May 12, AM. I use clear polycarbonate. It' cheap and will flex around corners. Should be a knockout. Member since January, From: NL 1 posts.
Posted by squarl on Friday, May 12, AM. I once saw a different solution of somebody and downloaded the pictures. Only I don't remember where I found them. I think it was also on Trains. The story was, that by putting some trees in the corner, a derailed train would be catched by them, like you can see below. Hope this could be a good idea. WIllem Holland. Posted by trainnut57 on Friday, May 12, AM. My track on my layout runs precariously close to the edge also and I had the same problem of catastrophic derailments: A brand new-first time around-BLI Hudson-although not where the track was near the edge-rather another story but not for here.
The board comes in white, can be purchased at any craft shop and comes in 20x30 inch pieces. It is easily cut with an exacto knife. Painting is easy too but be aware if you plan to undercoat it first, it will tend to curl. This can be corrected AFTER the paint dries by turning it over and applying even weight for a day or two-it will flatten right out.
Be sure you use a water-base paint-acrlic or latex, not oil based. Hope this has been of some help and good luck from the trainnut Cut it at the intersection of the two right angle pieces and you have two pieces, each about 8 feet long.
On another bridge, I used Micro-Engineering's bridge flex, code 55, which came with code 40 for the guards. Model Railroader. Switch Left. Latest User Videos. Broadway Limited Imports N scale Mikado. Beasley, please give us the info on how you fastened those inside guard rails on your bridge. Make an Offer.
Guards for model train track. Products of Model Train Track
Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Xinggao Shu and Nicholas Wilson served as principal authors. The restraining rail should be installed low enough to mitigate excessive wear and decrease rolling resistances unless there are other safety concerns.
In , Transportation Technology Center, Inc. Through time, as the locomotive wheelbase was shortened, railroads grad- ually eliminated rails on curves; however, they were still used on switches and frogs. Also, because of the variety of vehicle designs and track gages, standards varied among transit systems. The American Public Transportation Association APTA and antecedent organizations have been effective in sponsoring, producing, or assisting in the collection of data for publications aimed partly at improving track systems and standardizing them when that is economically efficient.
In September , the Track Construction and Maintenance Subcommittee submitted to APTA a rec- ommendation for a study of restraining rails accompa- nied by an outline of the scope of work required to develop guidelines.
A survey of nine U. Based on the practices survey and analysis, some guidelines for the use of restraining rail were compiled under that project and were presented in a report entitled U. In May , under the same program, a transit car test on a tight loop curve with a ft radius was conducted at the Transportation Test Center TTC in Pueblo, Colorado, to investigate the effects of lubri- cation on restraining rails and high rails of curves 4. This handbook provides guidelines and descriptions for the design of various types of light rail transit track.
The components of the various track types are dis- cussed in detail. The guidelines consider the charac- teristics and interfaces of vehicle wheels and rail, track 3. The Transportation Technology Center, Inc. In the following sections, information compiled from a literature review, a previous TCRP project survey, and the questionnaire survey for this project is presented.
The rails are readily available for the restraining rail, including worn rails that have been removed from track. Restraining Rail Figure 2 Wheel and horizontal restraining rail geometry. Figure 2 shows, are referred to as restraining rails. The girder rail shown in Figure 4 and the strap guard rail shown in Figure 5 are used by some light rail transit systems. The strap guard rail is an alter- native to girder rail for the convenience of fabrica- tion and installation.
Some transit systems place a guard or restraining rail adjacent to the high rail and the low rail on extremely sharp curves. In a double restrain- ing rail installation, the restraining rail alongside the inner rail shifts the leading axle of the truck toward the center of the curve. The outer restraining rail then guides the trailing axle away from the center, help- ing to ensure that the truck is reasonably square to the track, that both axles are in a nearly radial orienta- tion, and that the truck frame is rectilinear rather than warp.
Figure 4 Girder rail. Figure 5 Strap guard rail. Table 1 shows the current practices used by sev- eral different transit systems. Large wheelset AOA increases this binding effect.
Table 3 shows that transit systems use different standards. The guideline indicates that it is desirable to install the restraining rail as high as possible above the low rail. Equation 1 shows that the higher the restraining rail is above the running rail H , the larger the lon- gitudinal shift L. The effect of lubrica- tion on low rails, high rails, and restraining rails needs to be further investigated to minimize system wear.
Some of the current guidelines are not supported by current prac- tices, and a detailed study to develop general restrain- ing rail guidelines is needed for transit systems. Correspondingly, the wheelset AOA is relatively small. Both coordinate systems follow the right hand rules. The wheelset yaw angle is relative to the track reference frame. Wheelset yaw angle or AOA is usually measured in milliradians mrad. One mrad is approximately equal to 0. These wheel profiles are the wheel contour as observed in the track reference.
As Figures 8 and 9 show, the three-dimensional wheel flange contour changes dramatically when the yaw angle is greater than 20 mrad. Superelevation of the high rail causes gravity to provide part of the force to react to the centrifugal force. The high rail bears larger lateral forces than the low rail because of the action of the unbalanced centrifugal force and lateral creep forces caused by axle AOA. Figure 13 shows the lateral force distance history.
During a constant speed movement, the lateral force was applied on the wheel in three steps for steady- state climb and was held until the end of the simula- tion. As Figure 14 shows, for a degree flange angle wheel with a mrad yaw angle, if the flangeway width is too narrow less than or equal to 1.
Corre- spondingly, the left wheel wears severely on the guard rail, but the right wheel wear index is rela- tively small on the high-rail tread and flange, as Figure 15 shows. The guard rail and fastener com- ponents could be damaged because of the high lat- eral force and the guard rail service life could also be reduced by severe wear.
The 1. Clearly, the high rail wears faster, resulting in a shorter ser- vice life. Figure 17 shows the forces acting on a wheel. In this condition, the lateral creep force, F, caused by AOA by itself is not large enough to cause the wheel to derail.
When the wheel climbs past the The locked right wheel could easily derail under small perturbations when the wheelset exits the curve protection.
This assumption is validated through vehicle simula- tion in Section 5. Based on this assumption, the , , and mrad wheelset AOAs correspond approx- imately to a wheelset negotiating a curve with , , and ft radii, respectively.
The track gage for a degree curve ft radius is For the 1. Correspondingly, the optimal flangeway width has to increase to keep the same flange front clearance and flange back clearance.
In general, rolling resistance increases with increasing guard rail height, as Figure 27 shows. The following example shows that improper lubrication on the guard rail can 17 The best compromise value would have to be determined by comparing the cost of replacing the worn rail with the cost of damage to the fasten- ing components and guard rail.
For cases of lubrication with 0. As Figures 29 and 30 show, for a guard rail with a 1. The high wear index of the high rail increases the frequency of high-rail renewal and therefore increases costs. For a guard rail with a 1. So, for the case of heavy lubrication on the guard rail guard rail.
As Figure 36 shows, for a guard rail with a 1. To verify this approach, a simulation case was conducted with friction coefficients of 0. This approach can be used to generate 19 0 20 40 60 80 1. Increasing only the gage leads to excessive wear on guard rails. However, the guard rail height effect on the maximum rolling resistance is relatively small.
Table 5 shows the simula- tion parameters for girder rail. The conclusions from the girder rail simulations are therefore similar to those for guard rails. In order to allow for comparing the restraining rail simulations with the guard rail and girder rail simulations, a restraining rail friction coefficient of 0. The restraining rail height effect is further discussed in Section 4.
Figure 54 shows the effect of different restraining rail heights on rolling resistance. The restraining rail should be installed low enough to mitigate excessive wear and decrease rolling resistances without compromising other safety concerns. Figure 55 shows the effects of different restrain- ing rail lubrication conditions on rolling resistance. The rolling resistance decreases dramatically when the restrain- ing rails are lubricated at the 0.
The larger rolling radius difference and longitudinal shift lead to the high creepages and wear. If the restraining rail height is 0. Thus, the wheel back-to-back distance and track gage parameters for these two wheelsets are different for meeting the requirements of different vehicles and track standards. It is composed of three car bodies and three trucks.
The end car bodies are each mounted on a single truck at one end and con- nected to an articulation unit at the other end. The cen- ter car body is the articulation unit riding on a single truck equipped with independent rotating wheels.
The track inputs include a right hand smooth curve with a ft radius, 3. The spiral and curve are long enough to ensure that the vehicle achieves an equilibrium position while negotiating the curve. The wheelset AOA in the equilibrium position is about The wheelset AOAs in vehicles vary during curve nego- tiation depending on the truck design and steering capability.
Two types of light rail transit vehicles were used in the simulations. The two car bodies articulate on the middle truck, with all three trucks having solid wheelsets. The track geometry used in the simulations con- sisted of a downward vertical cusp of 1.
These irregularities of the track geometry were composed of ft wavelengths with a 1-cosine shape on a curve with a 1,ft radius.
The inde- pendent rotating wheels of the LRV1 vehicle with a degree flange angle wheel profile derailed at 25 mph. To convert the damage functions shown in Figure 64 into a cost function, four regions need to be considered: 1. For a wear index greater than 0 lb-in. There are no maintenance or renewal costs associated with RCF or wear.