RailRoad Wheel Friction

[@davesstuff1599]

That looked strange seeing a man just casually pushing the car along.

[@chocolatnoir1108]

lolz I was thinking the same 🙌

[@DirtyLilHobo]

On the BNSF he would have been fired..!!

[@theoutlier35134]

This explained much better with old camera compared to today's videos

[@IstasPumaNevada]

The flanges aren't what primarily keep the wheels on the track; it's the slightly conical shape of the contact surface of the wheel that does. The flanges are mainly there as a backup, for when the conical shape can't cope with higher lateral motions.

[@MervynPartin]

blnstr- I am sorry but IstasPumaNevada is correct. The conical profile of the wheel assists in centering the wheel set whilst traveling along straight track and by presenting a slightly larger wheel diameter to the outermost rail on curves, helps to steer the wheelset around. On tight radius curves, this is insufficient and flange contact does cause squealing and in these instances, automatic flange lubrication is often installed. If only the flanges were responsible for keeping the wheels on the rails, they would be worn away in no time. Every locomotive which I have built or been involved in overhaul has had conical profiling. Much research has been carried out to produce better profiles, especially for high speed trains, but in every case, the intention is to avoid as much flange contact as possible.

[@BuyMEaDriNk43]

blnstr- You're joking. Do some more research, if flanges are the main reason for staying on the track, then you would easily wear down rails. Yeah a 200mph high speed train is definitely grinding slight turns with flanges. We have this wonderful thing called google and youtube, do some searching. Flanges are the last resort for trains to stay on the track. Rail wheels have not changed since the coal mining days. Go on that search bar and type "how trains turn" and enjoy. It's a work of straight physics and i'm so upset you did not get to be marveled by it yet.

[@BuyMEaDriNk43]

NuggetOfBlueGold Half and half on that one. Flanges are the last resort for derail protection. It's the conical shape of the wheels that keeps it on the track. Basically what i'm saying is the flanges don't come in contact with the rails unless there is something happening out of the equation. Trains derail regardless of flanges because yo shit happens. so yes and no. Seriously, check out those videos where they make little models of conical shaped wheels, it'll blow your mind. Big bigger and biggest did a good one i recommend anyone who's into engineering to watch that show,

[@thomasstambaugh4832]

The flange meets the tread in a curve called the "filet", and the inside of the flange is curved, not straight. The railhead is also curved. The result is that as the flange moves towards the rail, the rolling radius increases and the axle moves upward. This means that the weight of the car keeps the wheelset centered on the track. On sharp curves, as the filet attempts to climb up the rail, it makes the noise we hear as flange squeal. Tracks are often also super-elevated, in order to increase the effect of the car's weight. Aside from the filet, the flange never actually touches the rail.

[@lederbadehose]

film zu Sinuslauf ; movie about sine run ; Search for "Sine run for small children..." copy /past the link don´t work.

[@steveevans7170]

Once the inertia is overcome. Momentum is what you have once the car is moving.👌🖖

[@RLMonsterA380]

"One person can easily keep a loaded box car moving"....meanwhile I can't even push my fridge when it's empty

[@quillmaurer6563]

That's the point they're making - very low friction steel wheels versus ... no wheels.

[@eltfell]

Empty fridges are depressing, that's the reason.

[@spaceage1060]

Just add wheels man.

[@DirtyLilHobo]

On the other hand, once that loaded freight car begins moving, one person is not gonna stop it…!!

[@tanoryjakaperdana1419]

@@spaceage1060 and steel rail

[@wibowopr952]

the disadvantage is that conventional trains cannot be stopped immediately when needed, due to the lack of friction and also limitations on the ability to climb in certain grade

[@eltfell]

On the other hand, the damage to the train in case it can't stop sufficient enough is small. That's an advantage of conventional trains.

[@dibujodecroquis1684]

@@eltfell Could you elaborate on this, please?

[@eltfell]

@@dibujodecroquis1684 I was thinking of a level crossing.

[@dibujodecroquis1684]

@@eltfell I understand, thanks. However, high-speed rail has no level crossings.

[@donaldrodgers8389]

Roller Bearings make cars roll better than the older friction bearings.On Class 1 railroads.Friction bearings are no longer used in interchange.Some MOW cars still have them.And shortlines.Some are in captive service on shortlines as well.

[@denelson83]

0:29 - You gotta be kiddin' me!!!

[@GewelReal]

Even I can do it (and did it multiple times) yet I cant push a 35kg weight on gym

[@JacquesDufrene]

"this isnt in my paygrade"

[@trainlover123trainsrock]

0:26 say goodbye to the camera

[@trailwayt9H337]

Very good view of an engineering of railway 😍❤

[@10xMegajoule]

My left ear loved this :-)

[@alexanderm.3644]

1:07 that's bare nonsense... Sine run is what keeps the wheels in track. The flange assist in small radius curves, switches, etc. but is in general not the desired surface to guide the wheel.

[@bigkiwimike]

You are correct. But I certainly wouldn’t want to ride down a straight without flanges either.

[@dibujodecroquis1684]

@@bigkiwimike I agree. Flanges are useful wheen hunting oscillation happens too.

[@kapilsharma091]

Impressive explanation... 👍

[@whiteknightcat]

I wish they'd compared this to something relatable, like a banana.

[@GlitchedBlox]

That man's strong.

[@ravirajsingh3175]

no matter how much the area of contact the friction will still remain same depending on the normal reaction from the track, which on the other hand depends on weight of train and angle of contact.

[@19wael96]

You don’t make sense

[@robertgary3561]

More please

[@blackbird4062]

They forgot about the friction between the carriage and axel

[@tomv3361]

Bearings, there is almost no friction

[@taurusbelos6479]

Oh yeah yeah

[@tpwkbs]

This is cool!

[@PrakashChauhan-km3ki]

jesse berryhill gadwali

[@PrakashChauhan-km3ki]

gadwali. gadwali 8gadwali

[@PrakashChauhan-km3ki]

gadwali.

[@leewebb7]

Remember when we had those honda shadows??.....

[@LNERMallard]

0:31 They spelled "Canadian" wrong.

[@TheLpbrennan]

Spaghettios Remember that Canada is officially bi-lingual. Things need to be in French and English, even in far-west Vancouver. (Of course, don't try to speak English in Quebec. . .) At any rate, "Canadian" is the English spelling, "Canadien" is French. CN cars have one side with English spelling, the other with the French.

[@LNERMallard]

Ah okay didn't realize that, thanks for clearing that up

[@herrdocjdm]

Does it really matter?

[@TheLpbrennan]

herrdocjdm I does to the hyper-sensitive francophone of Quebec. They make Monty Python's French taunter seem amiable and rational -- two qualities rare in La Belle Province.

[@user-eu9zu9ku4t]

Song???

[@ConriOakfield]

Yeah, but get a flat tire.....

[@EdwardChan.999]

Trains also have the advantage of derailing easily. This is by far one of the most efficient ways of killing passengers.

[@quillmaurer6563]

They derail from time to time, but when you look at number of passenger-miles they're probably among the safest means of transport. I'd say a more "cost-effective" means of killing passengers is to put them on something that isn't guided by solid steel rail but instead by an exhausted, distracted human driver surrounded by other vehicles similarly driven by humans. Derailments due to technical faults are extremely rare, almost all train accidents are due to human error of some sort causing trains to run into either another train (missed signal or signal operator error) or a car (driver idiocy).

[@moonshineblackmoon7293]

Train crashes are mostly done buy stupid car users who think they can beat the train.

[@Saucy-ws6jc]

Road vehicles crash and kill more than probably all other transport

[@mdenizcoban]

Well, theres like 20 high speed train crashes in total so they are probably safest

[@itsscience9113]

Cars kill far far more people than trains