brakes – St Charles Branch

Paint brush handbrake holding empties above the tipple — Handbrakes in action holding empties securely above the Mayflower tipple

The ability to set handbrakes to keep cuts of cars in place on a grade is a crucial part of railroading, and a model railroad is no different, especially one set in the Appalachians. I’ve covered my technique for building manually deployable handbrakes via a retractable wire between the rails (article here), but the controllable brakes are complicated to make and install, so I reserve them for areas where I’ll be holding long cuts of cars on a steep grade or for where I need to hold a car for a while and then let it loose for some “gravity assisted switching.” But there are several dozen spots on the layout where I’ll need to spot small cuts of cars on slight grades, so for these areas, I wanted something simpler. I also like free-rolling cars, so tricks like putting a tiny spring on the end of one of the axles was also off the table–it needed to be something in the track. Enter the cheap plastic paintbrush! Each paintbrush handbrake costs just cents to make, and I can easily make and install a dozen in under an hour.

I picked up a box of 100 inexpensive plastic paintbrushes a couple years ago when the local Christian bookstore was having a big sale. I didn’t know how I would use them, so I put them away for a rainy day. That day came when I was playing around with different ideas for holding cars in place. It needed to be something I could roll cars and locomotives across easily without derailing or causing too much friction that would also be sturdy enough to hold a car when spotted over the brake. I first tried two methods that I’ve seen work for others. The first is a little dot of CA on top of the rail, but many of my spotting points were just too steep for this. Next I tried little lengths of fishing line mounted between the rails–these are good because they’re tough to see and work pretty well, but they make a noticeable “plink” every time they clear an axle or a hopper bay… in sections of the yard where I had several in a row, it sounded like a tiny music box playing a discordant tune!

Paint brush handbrake cheap brushes — The starting point for handbrakes are inexpensive plastic paintbrushes from an art or hobby store

Then I remembered the brushes. The plastic bristles are pliable enough to give when trains are moved across them but stiff enough to hold a car when no other force is exerted. They could also be trimmed both in height and in density using a pair of scissors. They are certainly more noticeable than the fishing line or CA dots, but my hope is they’ll blend right into dirty coal-covered tracks, and those that don’t blend in can be painted to look like weeds. Even with nothing to disguise them, I find they don’t draw the eye much anyway.

Paint brush handbrake holes — Step 1 is to locate where you need the brakes and drill a hole–the hole is offset to avoid wear-and-tear on air hoses

The first step is to locate where you want to install the “brake.” Figure out where you want the car or cut of cars to sit, then mark the spot where the most downgrade axle will sit–this is where you want the brake. In some cases, like the end of a track, you can mark the spot of the downgrade axle of the upper truck–I use this at the end of stub tracks where I need all the room I can get. For tipple tracks, I find it useful to have up to four handbrakes per track. One at the uphill end of the empty track to hold a full cut of empties, one just above the tipple to hold a shorter string of empties, one just below the tipple to hold a shorter string of loads, and one just before the fouling point of the downhill switch to hold a longer string of loads (or any “gotaways”).

PPaint brush handbrake trimmed down — Starting and ending points with the brushes, just a little off the top and thinned down with scissors

Paint brush handbrake ready to install — The finished “brake” ready to install between the rails

The second step is to drill a hole between the ties for each hand brake location. I found a 5/32″ bit drilled about 1/4″ deep worked for my paintbrushes, and I offset my holes closer to one rail to avoid constantly hitting delicate air hoses on cars. To prep the paintbrush, I first cut off about 3/16″ of the bristles with scissors–the idea is to have them tall enough to catch axles but not the sills of the cars or cut levers. Then I thin out the bristles by repeatedly cutting into the brush with just the tip of the scissors while rotating the brush around. How much you thin it out depends on the grade and how many cars you want to hold, but for my light grades, I trim down to about the last 20 or so bristles. It’s easy enough to thin them a bit more once they’re installed, and if you get it too thin, it’s easy to just make another. Then I use scissors and cut off the brush end of the paintbrush leaving about 3/16″ of the plastic handle to keep the bristles secure. Installing them is usually a press fit, but if they’re loose, a little carpenter’s glue will help hold them in place. I press them down until the handle is below the ties where its bright color will be covered up by ballast.

Paint brush handbrake installed — Paint brush handbrakes installed between the rails

The final step is to test the brake by running strings of cars across them to make sure they don’t derail and don’t cause any noticeable jerking movements in the cars (if you look closely, you’ll see some movement, you just want to avoid it being distracting). When you let go, the cars should roll and then come to a gentle stop once they hit the brake. Also test a locomotive across each brake to make sure it doesn’t interfere with the trucks (this is the most stressing pressure on the brake). On steeper grades, you may find having a few brakes in series is needed to stop a string of rolling cars, or you may have to spot the cars exactly on the brake to prevent them from rolling in the first place. It’s easy enough to add and remove these brakes while you’re trying to figure things out. In the end, I’ve found this is a great way to hold cars in place without the worry of damaging cars or scenery, and it’s tough to beat the price and ease of installation!

Paint brush handbrake in front of tipple — Finished “handbrakes” to hold the loaded cars in front of the Mayflower tipple mock-up

Layout Handbrake in Action — The St Charles Switcher crew sets the handbrakes to leave a string of loaded hoppers on the grade while working the yard

Gravity is a major factor in prototype railroading, but it can be quite troublesome for a model railroad. Very little real track is actually completely flat, so train crews routinely use the handbrakes on individual cars to hold them in place in yards or sidings. Not only do handbrakes hold cars in place, but in the Appalachians where I model, gravity and handbrakes were often used to move cars from empty tracks to tipple loading points, to move loads into the right track below the tipple, or even to run-around a caboose at the end of the line. Modeling working handbrakes on individual cars isn’t very practical, so what is a model railroader to do? Some install springs on the ends of a car’s axles to use friction to hold the car, but this can’t be “turned off” to allow the car to roll freely. Others use little picks they stick into the ballast to hold cars in place, but this can be destructive to scenery, and it leaves an un-prototypical giant stick next to a cut of cars. I’ve adopted a method of fascia-controlled “handbrakes” on the tracks which works well for my needs.

Layout Handbrake step 1 — The first step of the handbrake is to locate where you want the brake, drill a hole, and insert a brass rod sleeve for the brake wire

This method is overkill if you just want to hold cars in place on a siding. For this I recommend a drop of CA, a piece of monofilament line sticking up through the tracks, or the end of a soft brush if more strength is needed–I use all of the above for holding cars in place when set out. I use the method here where I need brakes sometimes and free rolling other times, so the first thing you need to do is figure out where you need brakes. I once heard a story about a design presented to a university for a new campus that didn’t show any sidewalks. When the dean of the university asked the designer why there were no sidewalks, the designer replied “wait a year after the campus is open, then you’ll know exactly where the sidewalks need to go based on the trails through the grass.” So, where do I install brakes? Wherever I find I need them when operating trains–a question I also pose to my operators after every session: “is there anywhere you wished you had handbrakes but didn’t.” Generally speaking, they’re needed anywhere a crew will need to leave cars on a grade for a period of time to conduct other work. Since I’ve got lots of grades on the layout, I’ve currently got five handbrakes installed on the lower level alone.

The concept of these fascia-controlled handbrakes is simple: install a movable piece of strong wire between the rails tall enough to hold an axle with a mechanism to retract it when not in use. Once you know about where you need brakes, mark that spot between the rails, and make sure the area underneath is clear enough to install a brake mechanism. Remember, the brake can really be anywhere along a string of cars, so if your ideal spot is not to ideal under the layout or on the fascia, just move it a few inches. I use 1/16″ brass tube as a protective sleeve for the .025″ steel music wire I use as the brake, so once I find a spot, I drill a vertical hole between the ties for the brass rod. I like to offset the rod about 1/4-1/3 between the rails to avoid interfering with truck bolsters (coupler trip pins will also be an issue for those who use them… in fact, a similar mechanism might work for uncoupling too, hmmm…).

Layout Handbrake Off Position — Here’s the finished control in the “off” position (in line with track)

If you’ve followed me for a while, you know I’m a big fan of manual controls using slide switches–I use them for turnout controls, semaphore controls, and now handbrakes. You also know I’m a stickler for creating a fascia where the controls make sense and aid an operator instead of confusing them. In the case of the handbrake, I wanted it to be easy for operators to see when the brake is “set” and when it is retracted, so I settled on a control lever that lies in-line with the track when retracted and sits at a sharp angle when “set.” Just for good measure, I also use a bi-color LED to illuminate amber on the fascia representation of the affected track when the brake is set to help mitigate inadvertently running into a brake with the delicate footboards of a super-detailed locomotive (been there, done that).

Layout Handbrake Assembly — Here’s the completed brake assembly with three pieces of wood, DPDT slide switch, brake wire (vertical), and control rod (horizontal)

For the brake mechanism, I use a vertically mounted slide switch (DPDT in this case) with a 3/16″ throw–this is just enough to catch the axle of a 36″ wheel in HO scale when extended and still retract to almost rail height when recessed. The brake rod itself is a piece of .025″ music wire bent into a squared-off “J” shape running through a hole in the slide switch–initially, make this piece long enough that it will stick up about 1/2″ or more above the rails when in place. The control mechanism is a piece of thick steel rod (.062″ music wire) with a bell crank bent at one end. Th rod should be cut about 3″ longer than the distance between the brake’s track location and the location of the control on the fascia. The bell crank is offset about 1/4″ from the rod. As you can see in photos, I drill a hole in a piece of 1×3″ board centered on the slide switch and offset about 1/4″ laterally for the control rod to pass through (lined with 3/32″ brass tube for smooth operation). I also bend the bell crank at 45-degree angles instead of 90 as this allows me to make adjustments to the crank offset in either direction, shorter or longer. The structure for the mechanism is typically three boards: 1) the slide switch board with a large hole drilled out for the switch (mounted with screws), 2) the control rod board mounted 90 degrees to the switch where the bell crank is secured, and 3) the attachment board on top to make it easy to mount to the plywood sub-roadbed. I use 1×3″ pine for most of my pieces, but I may use different thicknesses of attachment plates to get the control rod at the right height for the fascia control–the brake wire can be really tall and still work, so better to have the mechanism hanging lower than to have to curve the control rod to the right height. Once I’ve got the three boards assembled with 1 1/4″ drywall screws, I disassemble it, insert the bell crank end of the control rod, insert the bell crank into a hole drilled in the slide switch, adjust the bell crank as needed for smooth operation of the switch, and reattach the boards with the screws.

For the fascia, I drill a hole for the 3/32″ brass rod sleeve as close to horizontal as I can get it and pointed directly at the brake location on the track. I pick the spot on the fascia that allows me to do this while keeping the control rod as perpendicular as possible to the fascia (you don’t want the control rod coming out of the fascia at a strange angle if you can help it). The LEDs are nice but not necessary, but this is the step where I drill the holes, about 1″ behind the brake control. I like to drill the hole through the fascia the exact size of the LED bulb and then use a second larger bit from the back side of the fascia to create a space for the rest of the LED–this keeps the LED from popping out the front of the fascia. I use bi-color red/green LEDs which glow a nice reddish amber when hooked up to AC (e.g., DCC track bus), and I attach one lead to one side of the track bus (with a 470K resistor), the other lead to the “up” position of the slide switch, and a third wire from the center position of the slide switch to the other side of the track bus. Super simple.

Layout Handbrake Under the Table — Here’s the handbrake mechanism installed under the layout–the control assembly should orient to the fascia and not the track

Mounting the switch mechanism is a bit of a pain and requires some planning and patience. From under the layout, I run the control rod through the fascia. Then I find the brass rod going up through the tracks and insert the brake rod (it helps if the brass rod is long enough to protrude beyond the plywood of the sub-roadbed). With the mounting screws on the attachment plate ready to go (screwed in so they’re almost through the board), I gently move the mechanism around until the brake wire is more-or-less vertical, the switch operates freely, and the control rod is as straight as possible between the fascia and mechanism. The mechanism is oriented to put the rod and switch perpendicular to the FASCIA rather than the track (angle relative to track doesn’t matter here). Once I’m happy with the placement, I run the mounting screws into the sub-roadbed.

Layout Handbrake Fascia Control — With the brake in the RECESSED position, bend the control rod parallel to the ground

On the fascia side, I now have about 2″ of control rod sticking out. With the slide switch in the DOWN position, I then grasp the control rod with a pair of needle nose pliers flush with the fascia so the bend will be about 3/16″ from the fascia and use my hand to bend the control rod to align with my track diagram (horizontal) in the direction of the bell crank so that “up” on the control = “up” on the brake. My convention is to face the controls and bell cranks to the left, but either works. At this point, I have the leverage to test the mechanism and fix any issues. If all is good, I use a Dremel cut-off wheel to cut the end of the control rod so about 3/4″ beyond the bend. For the control lever, I use a wooden 1 3/8″ “axle peg” which can be found at any large craft store–it’s admittedly an odd shape, but it’s distinct, easy to find, and easy to use. I insert the pegs into a vice and drill a hole the exact size of the control rod about 1″ deep into the center of the peg, then drill another hole in the side about 1/8″ from the flat end into the first hole and use an X-Acto blade to create a notch between the two for the 90-degree bend in the control rod. The peg is usually a press fit onto the control rod.

Layout Handbrake Wire Height — The brake wire should initially be longer than required in the recessed position

The final step is to trim the brake wire. I’ve found if I use a pair of wire cutters at rail-top level when the brake is in the DOWN (recessed) position, it is low enough for all my locomotives to clear and extends high enough to catch all my axles when needed. Because the wire’s location can be tough to see (especially when cars are over it), I use a little dab of yellow paint on the outside of the rail to indicate where the brake wire lives for easy spotting by crews.

Layout Handbrake Rail Paint — The brake wire can be tough to see with cars on top of it, so I use a little dab of yellow paint on the rail to help operators know the brake location

I’ll also share some “lessons learned” for using this type of handbrake:

The brake will find your lowest-clearance locomotive and keep it from moving until you trim the brake wire–remember this locomotive and use it to test all brake installs
If you try to pull a string of cars when the brake is engaged, you WILL bowstring every car between the locomotive and the brake off the rails (sometimes violently)
If you leave the brake “up” and roll cars into it, they will bounce back quite jarringly upon hitting the brake
If you don’t pay attention and activate the brake under a truck bolster or low-hanging part of the car, you WILL raise the car off the rails and derail it (or topple it)

Other than these “gotchas,” I’m very happy with the operational possibilities these handbrakes add to the model railroad!