Union Pacific freight train with rear car problems hunting oscillation

[@Dawgs241]

I know this is not the main point of video, but I love the sky in the beginning of video and how it contrast with the green grass. So picturesque.

[@richardgerlach5156]

You're not the only one who noticed that! Striking!

[@Mike-tg7dj]

Though it's so bleak it is still a beautiful almost mystical. I love the northern Plains of the United States, especially in the spring and summer.

[@ludah99]

I almost thought it was a fake shot it was so good looking!!

[@dickJohnsonpeter]

Overcast skies actually make colors look more vivid and saturated than in bright sunlight. Useful info when photographing stuff outside.

[@jovetj]

Western Nebraska doesn't typically look like that! It's usually beautiful, but washed-out, and dry and bleak looking. Though, the video doesn't say where this actually is.

[@dannymccarty6680]

Hey man, pacing and spotting that action at speed and then zooming in and nailing it on video??? You are a professional freak show. IMPRESSIVE!

[@travelingtom923]

Thank you.

[@Cnw8701]

"On! On! Faster, faster!", giggled the trucks.

[@kurt8986]

Lmao

[@andresnunez3076]

Ah i see you are a man of culture

[@xXBaileyXx91]

Buff my buffers, fizzling fire boxes shot ed thomas

[@emcewen]

Those pesky Troublesome Trucks!

[@Bayuweking]

Hi bro I want to promote my channel. I Also Want To Create Content About Trains, There Are 2 Videos.

[@kenkramer6529]

Just a great job of documented this phenomenon in real time. A terrific way to show what it looks like when it's happening.

[@pedromorgan99]

Searched for "hunting train".. this was top of list and curiosity done. Wonderful and thanks (all the rest were about dogs)

[@rjb5847]

I am a retired CPR conductor. I've been retired 9 years after working 37 years. Thirty odd yrs back, we had a 45 mph speed restriction on certain empty gondola and bulkhead flatcars that were not equipped with constant contact side bearings. These are located under the carbody and touch the top of the truck sidecasting to prevent hunting. The cars you've shown seem newer than the ones we had restrictions on, but a sidebearing issue might have something to do with the wat these cars are tracking.

[@uhlijohn]

I thought it was a 50 MPH speed restriction? I am a retired UPRR loco engineer. You could be right though....I've been retired for over 6 years.

[@rjb5847]

@@uhlijohn CP has always been conservative in their rulemaking, ours was 45, but our maximum speed for freight system wide is only 60mph. UPs restriction could have been 50. Our restriction was issued by the company not the regulator.We had some trains that exercised running rights on CN who had no restrictions on those cars.. their dispatchers were always giving our crews hell for going too slow on those trains.

[@markreardon3472]

Constant contact side bearings actually keep the car from leaning and an even load on the truck bolster span which in turn is supported by the spring packs. Most hunting occurs when the wheels have lost their proper profile allowing the truck assembly to freely "float" in a happy spot on the profile of the rail. Some side contact bearings we're nothing more than a solid round of steel in a pocket casting on top of the bolster span.

[@rjb5847]

@@markreardon3472 thanks for the info. I know wide gauge can have a similar effect like worn wheels with some cars. The side bearing issues we had on CP may have been harmonic oscillation type behaviour, but seemed to resemble hunting at higher speeds.

[@rjb5847]

@@markreardon3472 having looked at the video again it's clear that the trucks are hunting significantly, I would assume the motion of the carbody is caused by that hunting rather than side bearings as you've noted.

[@mason7024]

My dad works for Union Pacific. A few years back we were chasing a DPU that was shaking like this. We called dispatch and they shut down the line to inspect it.

[@calif1mc]

That UP Gondola is fairly old, it has poling pockets on the end, that makes it at least a 60's era car, the practice of poling (it's dangerous at best) was outlawed by most railroads by about 1964, and it was completely gone by the early 1970's. It's obviously had a very long service life.

[@markfryer9880]

@Amed Tajan Poling pockets are round cups on each corner of a car or locomotive and were used with a long pole to push a car or a cut of cars clear of the fouling point of a switch or siding.

[@carolinarailfanning]

I thought so too... it most likely had a truck replacement to the modern design... I can tell because it appears to have dropping bulkheads for long loads like beams but railroads just use flatcars now, usually they would weld on a fixed bulkhead and install a standard brake wheel instead of a lever, matter of fact most gondolas of that age would be cut up by now.. it definitely is very old and likely from the 60s, not only that but it’s shaking like the CNW gondola behind it... but not as bad though, it may also be going for scrap because I think it also had scrap in it, but normally would be marked in spray paint or something..

[@conraillock666]

And the fact that I was unable to find it on the internet

[@CraftyFoxe]

It's a real life Troublesome Truck!

[@sleepycat993]

How is it a troublesome truck

[@canoecarver2449]

Idk check for your self.

[@stampycatfan01lol]

Yeah, that last gondola definitely had an issue. It also had a “HOME SHOP FOR REPAIRS” label on it, so they were both likely going for repairs.

[@DeviltoGeorgia34]

Last Car: "I can't stay on the track much longer!!" Second-To-Last Car: "Help us!!" Third-To-Last Car: "Hold on, boys!! We're getting you home!!"

[@Elfnetdesigns]

HL1 SFX needed

[@Highheadlight]

"Bullshit" said Thomas, "you're going to the scrapyard!!!"

[@metalgear6531]

@@Elfnetdesigns "UEGH" "STAHP" "NO!"

[@verastaki]

I love that EMD GP40-2 Locomotive in consist! I miss the days when all you would see on Class A railways is EMD SD40-2's, SD50's&60's, GP38-2's, GP40-2's, GP50's and such, High-Hoods, B-Units, Switchers, Slugs, Tunnel Units and such...

[@travelingtom923]

Not too many on the main lines anymore. Still a lot elsewhere though.

[@dsmith9964]

I recall that the L&N was still using EMD F7s and F9s to haul coal back in the late 1970s.

[@walterfink9782]

Great job on noticing the defective trucks. I've never seen that before. It's very noticeable. I would think, a bad rail, could cause a derailment.

[@SuperAWaC]

that's why they put them on the end of the train

[@katsebua]

Bad bearing(s) ? Something is not rolling freely

[@send2wj]

I think it could one of the wheels which isn’t completely round anymore. Something which is rolling is the cause of the oscillation.

[@katsebua]

Oscillating problem is on 3 trucks on 2 cars... puzzling.

[@nlo114]

Truck-hunting must use a lot of energy. Years ago an oil train used to pass the bottom of my garden at midnight with a hunting truck. Glasses and cutlery used to clink on the shelves when the train was a mile off, and rattle as it passed. Those old wagons are long ago scrapped, but now I know what it was that shook the house.

[@jackmaxwell3134]

Your video is the ONLY one of youtube with this train hunting sound! Congrats!

[@miltonsmith6044]

Great documentation and video. The defect(s) seen in the video are probably why these cars are on the rear of the train.

[@Trains4Fun]

Nice catch. Also colours look amazing with the contrast between the sky and landscape.

[@carolinarailfanning]

Both the CNW and the UP gondolas are shaking like they are... they are definitely near the end of their service life... if anything was put in the middle of that CNW gondola it would bend in half, it was not just shaking, but twisting too. The UP gondola is no exception.. it is possibly even older than the CNW one because it looks like the end bulks drop down for oversized loads like large steel beams and girders for buildings and bridges but they use flatcars now (duh) so most of those gondolas had the bulks fixed in place, also the hand brake was a lever instead of a wheel because we put the wheels on the end of the cars and that is the only other thing that could be done because the brake wheel would obstruct it from lowering, and even that was replaced with a normal brake wheel after welding the bulkhead in place... but back to the issue, the cars look like the problem is where the car is mounted on the trucks possibly loose or worn out whatever keeps it stable. I also know that UP gondola probably had S1 trucks instead of the S2 when it was built. Yet again because that car wasn’t built for the bigger S2 so it looks like it doesn’t fit well.

[@carolinarailfanning]

Good lord I had no idea I typed that much...

[@robertheinkel6225]

I saw this once in a cross country trip. The car was trying its best to derail. I wanted to notify someone, but this was before cell phones, and I had no idea where I was at the time.

[@GUSTAVTIME]

Very dangerous that movement, good job to capture those images!

[@burlingtonfan7492]

Judging from the torn sticker on the car below the reporting marks, it’s probably being transported to a repair shop

[@hankshwank9113]

Then there should be a speed restriction on that train

[@burlingtonfan7492]

There probably wasn’t, but if there was, the crew etheir didn’t care or forgot about it

[@burlingtonfan7492]

Also, surprisingly the car still has its CNW reporting marks 24 years after the company merged with UP

[@hankshwank9113]

@@burlingtonfan7492 usually the railroad would have an outside crew come on the property and cut the car into little pieces and haul it away for scrap. I've seen that done before.

[@burlingtonfan7492]

Yeah, the car is literally 55 if not more years old so it’s a bit past the lifespan for your average railcar so I see why UP would chop it up. But it said it was in for repairs so it’ll probably still keep kicking around for awhile

[@joshthetrainfan]

I've been looking for this video forever. Damn, that car has issues.

[@BillP-kg1yp]

A few more trains like that and those rails might need a grinding.

[@mikehoncho658]

Imagine being a train hopper and jumping in these last well cars as a last resort before the trains gone, then getting the ride of your life on one of those cars

[@eugenkramaric1173]

Uh i cant even imagine.

[@carolinarailfanning]

no need to be obnoxious but well cars carry containers and can be stacked 2 high, these are rotting gondolas bound for the repair or worse the RIP track. And carry basically anything that can be exposed to the elements.. gravels, pipes, RR ties, anything that fits in the gondola and under a bridge.. And yes that would be very uncomfortable, might even make someone seasick.

[@mikehoncho658]

American Railfan no need to prove that you know about trains, the average person don’t know what a gondola is, everybody could tell what I was talking about

[@kingjames7273]

Probably have multiple orgasms lol from vibration

[@mikehoncho658]

King James lol you might be right about that, I believe I would shit my pants and pray at the same time and I’m not a very religious man

[@markiewodi3371]

Hey awesome video! The natural settings, the contrast between the grass and sky is spectacular. As far as the hunting I’ve heard and could conceptualize it but never witnessed it, until now. Great video!

[@ryansoltess6006]

Amazing what oscillation looks like and effect it has on the car ahead of it.

[@crazyman762]

Excellent recording work especially considering the conditions of pacing the train.

[@ElementofKindness]

Clearly, it's just having a good time while along for the ride

[@midwesternrail4729]

CNW logo and Gp40 will hopefully compensate.

[@davidmihevc3990]

This is definitely pretty spooky to see happen. Quite a few years ago I saw a boxcar in the middle of a train doing this, it was yawing back and forth like crazy. I got further from the tracks because I was sure it was going to derail. As far I know, it made it wherever it was going.

[@dbgillus]

Great work on recording the moving train and the problem cars

[@danielkeene3852]

Looked like a GP40-2 running 4th on the consist. A little yard switcher going for maintenance maybe?

[@travelingtom923]

Yes probably to North Platte for inspection.

[@everettthepetractionguy4222]

Whoa, this is bad!!! 👉 02:33. Hunting oscillation is an accident waiting to happen. 😳😨😬

[@macgyveratlarge2133]

Seems the wells are a bit worn, and I'm not seeing the shims that the trucks come with, either. I've had to deliver wheelsets and trucks all over. I would ask a lot of questions of the guys, and they explained a lot to me. Being a train nut, I took it all in and filed it away.

[@wsor4030]

Best truck hunting video I've seen yet. Amazing job!

[@magmathon2]

Great video, never seen that before in action. That looked like if it had hit a frog or crossing in just the right way, it was getting some serious air time.

[@TheAdamRides]

Great video! And great example of "truck hunting" or "hunting oscillation".

[@BenjaminEsposti]

Wow, very great captures of this phenomena! It can be caused by many things, even a combination of things, such as rail wear/profile, wheel tread profile, worn bolster plates, worn socket for bolster pins, worn pads on the bogie frame, broken/bad springs, etc... Locomotives can do this too. The SD90MAC/SD9043MAC are notorious, as when a rubber damper wears out, it will start a hunting oscillation ... yeah, with a load of 180+ tons...! Edit: Also, I see a LOT of gondola cars with banged up or warped sides. Why on earth do the railroads keep using them? I suppose, the steel is the softer kind, so it has more flexibility, and it might not be such a problem. But it certainly looks horrible! Edit2: BTW, it's not a bad idea to look up the car owner and railroad it is currently on, to tell them about the problem and voice your concern.

[@travelingtom923]

I will have a video tomorrow of a locomotive oscillation. The gondola cars are practically indestructible. I used to work in a scrap yard loading those cars with scrap metal. Some of the old Santa Fe cars were from the 50's and still in daily use. As long as they are structurally sound they will continue to be used. Union Pacific has recently installed a sophisticated system of sensors and cameras at the North Platte yard to determine if these cars need to be bad ordered. If those cars were bad they would know it. Maybe I will make a video of that location the next time I am up there.

[@iphil_good]

The rear trailer on a set of triples does this too. Just don't look in the mirror...😁

[@hamiltonsullivan6563]

Trains are diff tho u truck guy

[@macgyveratlarge2133]

Principal is the same.

[@kman-mi7su]

I have seen it with doubles. Years ago I drove for Roadway Package System and then after they were bought out FedEx ground. I pulled plenty of doubles.

[@doughesson]

Ca-rack that whip!You must whip it!

[@macgyveratlarge2133]

@@doughesson I'll tell you what, I've seen some damn good doubles and triples drivers. You can always tell them from the crowd by one thing. Rarely, I see a set going down the road, and the driver does a quick lane swap, and the entire set behaves as a unit. No sway, no overshooting, no hunting....AT ALL. Watched the same driver switch back to the original lane, same story. At that point, I knew it wasn't a mistake.

[@dsmith9964]

It's always nice to see SDs and GPs working together!

[@RogerMurdock]

Great video. Great sound. So hypnotic and incredibly fascinating to watch

[@jenniferwhitewolf3784]

Great catch! Rarely seen in this magnitude...

[@tracybrislin]

Imagine riding on a caboose behind this gondola at60 mph! No big deal really, looked scary when you opened the front door of the caboose, but never had a problem. Much ado about nothing! Noisy but got back up in the cup-aloe and watched for hot journals (hot boxes).

[@MichaelDBahnverkehr]

Excellent video!!! Super long train!!!

[@carolinarailfanning]

In America this is normal... but good lord the Canadian pacific can be double length...

[@MartyMacgyver]

I'm reading "Train Wreck" by Bibel and just got to the truck hunting section... Your video illustrates it to a T.

[@ackmino]

Yep it's all over the damn road. Nice catch.

[@michaelking3327]

if you ever see something like this folks, get the number of the lead locomotive and call the rail company that is displayed on the lead locomotive. also if you can provide any nearby road names or milepost numbers or crossing numbers, that will help too.

[@SuperForged]

Really gorgeous contrast on those clouds!

[@uhlijohn]

When I started on the RR in 1974 they still had brass wedge journals as not all rolling stock had been converted over to roller bearings....car dept. still had oil cans to refill dry journal boxes.

[@rjb5847]

The "side bearings" that may affect hunting, are above the truck side frames. Constant contact type probably weren't installed on cars built with friction wheel bearings.

[@carolinarailfanning]

Well I know for sure that Union Pacific gondola had them when it was built but the entire truck design was upgraded and so were the bearings. Even though even some yet VERY RARE to see that the S2 even though that they don’t have friction bearings, can sometimes have journal boxes for some reason...

[@rjb5847]

Just to be clear, I'm not referring to wheel bearings but side bearings. They are above the truck sideframes.

[@williammoses6232]

the trucks are moving left and right is this what you call 'hunting ? i noticed the the car body appeared to bouncing on the springs as well. what would cause this ? worn bearings? worn or perhaps a bent wheel? a worn out axel? or all three?

[@MrJtappin]

Yes that's hunting, like a caravan pulled too fast. There is something serious wrong with that car as it doesn't look like an unbalanced load.

[@williammoses6232]

@@MrJtappin the car is empty. notice the yellow "do not load sticker in it? most likely being transported to a repair shop

[@stephensaines7100]

@Ben King Bent axle or misaligned wheel would do it too. Note the oscillation appears timed to a complete wheel revolution. And if the bogie is rocking, that motion is handed-off to the next car coupled.

[@williammoses6232]

@Ben King thank you i have never seen any thing like this before it looked like the last car, would have derailed if the car was pulled any faster

[@Awesomewolfpic]

@@williammoses6232 also sticker says do not load and below it says repair

[@newmanatkinson3577]

OK That is not just that car but the one in front of it is doing the same thing. They may both have the same kind of issues and need to be repaired but there must be something in the track as well helping this oscillation to continue Did you call the emergency number for the railroad. Then they would for sure be responsible if something happened as they were notified, As for maintenance they car may never see repair work done till it's next inspection or worse a derailment Newman

[@williamault1435]

the one in front was being jerked around by the one in back

[@skydive7054]

"Hold Back! Hold Back!" Chuckled the trucks.

[@lendavidhart9710]

Impressive, thanks for posting/sharing. Edit, how fast were you going, keeping up with the train?

[@whiteknightcat]

Nicely done. That looked like another PSR monster - two, if not three, trains combined into one - one manifest, one sand, and a local pickup. You think that hunting is bad? Wait 'til you see it on full height cars. No way anyone could ride the roof of a rockin' box.

[@josephchamplin5050]

Both trailing gondolas are likely headed to a repair shop or to scrap.

[@Roc-Righteous]

No wonder they stuck em in the very end of train.

[@scdevon]

I'm always amazed how much confidence the railroad has to just pull that wagon along at that speed even if it is in the rear. If it hit the ground, it would cause major damage and they might not notice it for miles when it happened. I thought I saw daylight under those wheel flanges a couple of times.

[@waycoolscootaloo]

@@scdevon They would notice right away when the train drops air from the decoupling of the airline connection's. So if they derailed and separated from the rest of the train, the train would go into full emergency and come to a complete stop.

[@TheNemosdaddy]

It's not an easily detected situation even from an experienced carman. They have detectors now that can flag the cars for inspection. It's a wear issue, not a derailment issue.

[@dibujodecroquis1684]

Hunting oscillation is uncommon in freight wagons due to their high axle loads. However, that rear wagon is unloaded (see the "[needs] repairs, don't load" notice attached to its body) and thus its axle load is low enough to cause the oscillation.

[@kens.3729]

Great pair of Eyes. That is Scary and thank GOD it’s the last couple of cars. 👍

[@wolfen216]

Good Ole Truck hunting. A load would apply more pressure to keep it from doing that, but considering I can see the Home shop, do not load tag on it, it's def going to RIP track somewhere.

[@hankshwank9113]

If the railroad didn't close so many of their repair shops at their major yards, the car would have been repaired where it came from.

[@coldblue9mm]

wolfen216 BINGO! Good answer!

[@joes2362]

From 1:11 to 1:33 take a good look at the sun's rays. How far away is it? And how can it do that when it is so far away? And again from 2:15 to 2:33.

[@JawTooth]

Things that make you go hmmm..,

[@steevee1945]

Excellent photography.

[@robertgift]

Nice catch. Nice video of it.

[@mclare9817]

Great filming...Well done!😀

[@55tmilam]

Excellent video! I wonder if the abuse those gondolas take in the scrap yards has anything to do with this problem?

[@Gizmologist1]

The socket for the truck's pin is REALLY wallered out.

[@sd90mac61]

OMG 😯😱😵 them 2 cars need major ATTENTION, A DERAILMENT WAITN TO HAPPEN. GET EM BOTH TO THE SHOP AND REPLACE THE TRUCKS, AND POSSIBLY THEM WHEELS TOO. THIS AINT NOTHIN, IVE SEEN WORSE, MUCH WORSE, SORRY DIDNT HAVE A CAMERA AT THE TIME, HAD I WELL I CERTAINLY WOULD OF GOT FOOTAGE, THANKS FOR SHARING THIS WITH ME ✌️ 👍

[@peperodriguez139]

Muy buenas Tomás. .. excelente video ..aparte que el clima Seve precioso buen video ( 10 ) 👍👍

[@thenewpatticakes4214]

He seems to be enjoying himself

[@upstatenewyorkrailfan6775]

Awesome video 👍

[@travelingtom923]

Thank you.

[@MrSteeleye]

It is caused by worn out wheels ! The wheel profile has to be re-turned on a wheel lathe. But by the look of those wheels there is not enough left to be turned. So the wheels and axles will have to be replaced. There are also a lot of wheels on that train that will have to be turned because of the flats. The constant hammering causes damage to the bogies and the track.

[@MrBobity]

Nice video man..

[@garyfowler6380]

good catch on that car

[@sclm046]

Do the railroads still use the "rear ender" designation? If so, regarding certain defects, a rail car is allowed to travel empty at the rear of a train to the closest shop. Usually a speed restriction is ordered, meaning that the train is not allowed to exceed a certain speed. If this is not an option, the railcar has to be repaired in place.

[@christopherrichardson5166]

Well they still have the defective Detective still in effect but maybe that the train haven't ran over one so far so determined to tell the engineer or the conductor that one of the cars is not operating the right way like it supposed to be because those detected reads out how fast train going the milepost that they are at and also read Out any broken axle or a bad wheel bearing

[@boahneelassmal]

That last car is like the last kid in the line... skipping dancing and singing because it's such a beautiful day _car sings_ on and on we go on the tracks dummdumumm. On and on we go through the countryside..... On and on we go on the tracks... On a- Oh hey there ain't it a beautiful day today!?!? ^_^

[@EricPowell_Indy]

Combination of worn out truck frames, maybe a mismatched wheel. Gondolas are the “borrowed miles” of railroading. Just the nature of their use - scrapyards, Steel mills, etc., they get the crap beat out of them.

[@MiddleTennesseeRailProductions]

And that's just putting it lightly.

[@harshadbyadgi]

Thanks for uploading

[@travelingtom923]

You are welcome.

[@zdthelehighlinerailfan5362]

@Traveling Tom... Why were the 2 rear cars wobbling like that??

[@travelingtom923]

Check out the link in the description.

[@verastaki]

What's wrong with the Gandolla car's wheel trucks? Why are they shaking and whobbling so intense like? It's causing the next Gandolla car coupled to it to whobble and shake as well! The brake shoes probably need replacement!

[@gordbaker896]

Nice catch. Is the Repair Yard in Ranger Texas still in operation? I visited there once to inspect Acid Car from CGTX

[@ralfie8801]

Gord Baker There is a short siding and a couple shorter tracks off that siding in the middle of town. They set broke stuff off there to wait for an inspection or Hulcher to show up and change a wheel set or traction motor. I was there about 3 weeks ago inspecting a number 4 T Motor on a GE C-44AC to see if it was safe to move the unit to the shop for a TM change or if Hulcher needed to change it online. The TM leads shorted together and burnt the glad hands off, but the motor wasn't bird nested, so it was hauled in to the shop DIC.

[@gordbaker896]

@@ralfie8801 Thanks. It was likely 35 years ago when I was there for several days. Amazing damage repair to rolling stock. I remember a derelict red brick building in the middle of town. First exposure to that sort of phenomenon. I was taken on a short ride in one of the old coaches that was there at the time. Private track as I recall.

[@gordbaker896]

@@ralfie8801 Thanks. It was likely 35 years ago when I was there. Amazing damage repair being done to rolling stock. I always remember the derelict red brick building in the middle of town. First exposure to major change in small towns. I was taken on a ride in an ancient coach on the short private track there.

[@ralfie8801]

Gord Baker I would like to know exactly where this yard was so I can track it down, the only thing there now is that short siding in the middle of town and the long Tiffin siding at the top of Ranger Hill a couple miles north of town. Do you remember the red brick streets along the UP mainline? The brick streets are still there, but are very rough now days. There are a lot of red brick structures in that area, the brick was made in Thurber, Texas about 20 east of Ranger. It was a cheap building product during the 1920's and 30's. At one time highway 80 was paved from Ft. Worth supposedly west at least as far as Mineral Wells. That happened during the depression as one of those work projects.

[@ralfie8801]

OK, I think I found where it was, there are remnants of an old yard and/or shops to the west of Tiffin siding north of town and a couple of small lakes, but that is all gone now. You can see in satellite photos where several tracks were in a good sized flat area that also had a long building or two.

[@bradleyhannah8713]

Ya see alot of car defects these days lots bad wheels, brake problems as a former Carman and Brakeman I pick up on this stuff.

[@MiddleTennesseeRailProductions]

And the source from those defects can be summed up in three letters: P.S.R.

[@nigelterry9299]

Sounds like the CNW wagon has more flats on it's wheels than round bits. The UP wagon isn't much better.....

[@Cnw8701]

@@timsering9964 Same damn thing. Just different dialect.

[@SouthernRailfan]

Awesome catch!!

[@ricardojuricic9027]

What's the distance between posts? At 0:15/0:20 got the train goin past railway posts. If we may know the distance between posts, then we can calculate the speed.

[@thomasboese3793]

If I'm right ~ Figure 230 feet, between each of 5 posts, 1150 feet over 12 seconds, so the number of seconds in an hour - 3600/12 = 300 ~ 300 * 1150 = 345,000 feet per hour or 345,000/5,280 = 65.34 miles per hour. "IF" I'm right. UP has always been know for speed, even the Big Boys back in the day hit 80.

[@jamesmcdonald6047]

Truck Hunting can be a very serious defect, can cause derailments. Most class 1 railroads have sensor equipment built into track to analyze this today. This car had a Home Shop-Do Not Load sticker on it for this very reason. Center Plate worn out is likely the issue. Would say car was sent to an off-line repair facility, noticing removed sticker and repainted numbers on car, but real repairs were never made to car. I've cars much worse than this, actually hopping from side to side on wheels, truly scary to see.

[@stephensmith799]

Bogie Hunting was solved a long time ago, separately by South African Railways and by British Rail’s Research Department, Derby, UK. How come these obsolete bogies are still in use?

[@travelingtom923]

Cars have a 50 year lifespan here.

[@stephensmith799]

@@travelingtom923 Thanks for your reply. I think Scheffel bogies would stop all the hunting and wear. They have cross bracing in the form of an X between the wheelsets. Very simple and effective up to 160kph says an ex SAR driver. Also a cheap bogie.

[@jdaniel9622]

There are many causes of train hunting and is a of combination of track conditions, wheel wear, and speed. How did UK and South Africa solve bogie hunting? Any resources I can look into?

[@stephensmith799]

@@jdaniel9622 Check out the Scheffel Bogie (South African Railways). It has cross members (bracing) between axle boxes that have some movement in them provided by rubber blocks. Very simple. The slightest wandering by the leading wheelset is dampened by contrary movement in the trailing wheelset in the same bogie. British Rail Engineering Ltd (BREL), Derby found hunting could be solved by giving each wheelset more independence relative to the bogie frame. I like the the SAR solution for its simple genius and low cost.

[@yz8302]

Flanges are wearing out on the tires?

[@jamesburnside3023]

Some bad wheels on there have seen worse believe it or not on MOW cars

[@rfbedell347]

Kind of alarming. Out of curiosity, what would cause this condition ?

[@ModelingSteelinHO]

It is called Truck Hunting. Give it a quick search on Google . It will explain further details on the subject. You can also learn more by glancing at the video posters description. Shoot,there's even a link to Wikipedia on Hunting Oscillation. Good day.

[@rfbedell347]

@@ModelingSteelinHO - Thanks

[@robjohnson8522]

Fascinating! Does anyone knows what causes this? I am just guessing the flanges on the wheels are worn away enough to make too much slop between the rails?

[@travelingtom923]

Rob click the link in the description. It describes this problem in detail.

[@robjohnson8522]

@@travelingtom923 Eh, I don't think that is just everyday hunting. If it was you would see a lot more of it. Something is seriously worn out on that car.

[@travelingtom923]

@@robjohnson8522 I would agree as I have seen thousands of trains in my lifetime and this was a first for me. It may have been heading for North Platte for scrapping and that maybe also why it is on the end of the train.

[@Mike-tg7dj]

I wonder how long before the oscillation grows through the train or becomes so irritating they have to slow the train down or stop.

[@ACLTony]

I wonder if the crew had been aware of the oscillation, if they would have stopped.

[@nathanmullins836]

I wonder what number that would score from the truck hunting detector?

[@travelingtom923]

I am guessing a 10.

[@kevinb9407]

I am wondering since its probably an old cut down boxcar that was repeatedly used in a steel recycling facility to haul scrap metal (?). I have seen quite a few antique cars that ended their useful lives this way, and most likely, was very heavily dump loaded by metal cranes and it possibly bent the frame/trucks. If this is the case I really wouldn't think they wouldn't waste time, and money to rebuild the car, but just send it to the scrap yard to be cut up instead, or are just moving it to another steel mill to use again.

[@carolinarailfanning]

well at this age it probably is limited to scrap haulage only, some old gondolas have “SCRAP METAL ONLY” spray painted on the sides and sometimes the ends too.. but I don’t think it was formerly a boxcar by the way it looks.. it’s from the CNW so it’s just old.

[@4gauge10]

If there is opposing train going the opposite direction and this car derails and goes into the adjacent track,it could wind up killing the train crew of the opposing train,plus destroy quite a few cars,maybe even a explosion if they happen to be loaded tank cars with flammable liquids. That car needs to be put on a flatbed and taken to the repair yards as soon as possible.

[@travelingtom923]

I saw this train earlier going about 60 and that car was shaking so badly I was sure it was going to derail. In the video it is only going about 40.

[@4gauge10]

@@travelingtom923 I'm surprised you didn't notify the railroad about this.That could wind up killing somebody.

[@travelingtom923]

@@4gauge10 It was not far from North Platte yard which is why they were slowing down. At North Platte theses cars will be inspected and repaired.

[@4gauge10]

@@travelingtom923 Very 👍 good

[@eva.cassidy]

@@4gauge10 One of my relatives works for a RR in the eastern part of the country and someone sent a hunting oscillation video and when he got to the yard the supervisor said "check this video, pull that car off the train now!"

[@charlespitts5803]

Very interesting. What happens after 10,000,000 cycles???

[@pauljensen5699]

The gondola's trucks are hunting for hunter harrison. PSR sucks.

[@willydodson1]

ive seen that before, didnt know if it was normal or not. cool vid.

[@kurt8986]

Awesome video

[@25mfd]

good catch but very tough for crews to spot... maybe if they get a roll by someone MIGHT see it but don't hold your breath... usually the car dept forces see the cars when standing still in the yard during inspections... the ONLY way to see this is the way it was spotted in the vid... good luck getting the railroad to pay car dept forces to perform PACING ROLL BYs

[@Survivor1547]

Nice looks like wheels are kind of wobbly getting to completely off the tracks and derail the train.