The design of train wheels is genius.

2 minutes, no need for 20 minute long essay to explain something simple and that's what I like

Bro's recording in a wind tunnel 😂

The background printers are a bit annoying but not as bad as people are making them out to be. Great video, really enjoyable use of modelling and printing to get each idea across too. Well done!

All the armchair experts being so confidently wrong in the comments and missing basic things like "these are exaggerated train wheels" has me worried

Bro is recording and his mom is vacuuming his room.

Unusual information: Where there are curves in railroad tracks there is usually a device called a wheel greaser that - when a train goes over it and activates it - pumps grease on to the wheel flanges so they'll slide along the rails with less friction.

I think everyone missed the part where he said they are an exaggerated example of train wheels. Should have said they are an over exaggerated example of train wheels. Also left out that each set of wheels is in a truck or carriage that pivots. So you have slightly conical flanged wheels that are on carriages that pivot to conform to the curves of the track.

Great demonstration and vivid video to bring home the key principle of rail wheel design. Thank you very much.

As a trackwork engineer, this is somewhat true, but there are several other variables missing. First of all, the wheels are a combination of a conical design and have flanges. The angle of the tread bearing surface of the wheel is also closely matched to that of the rail head. Another variable is that on a mainline, the rails are canted, meaning they are angled inwards. This plays an important part with the wheel to rail contact. Lastly, depending on the speeds and degree of curve of the track, there can be an elevation change of the rail to help the train steer.

train tracks also are extremely gradual in their turns....the coning is VERY small and minimal. Its hard to see in person even

It’s pretty cool if you think about how carriages are mounted to wheel bogeys as well. It’s like a multi-layer system where each layer deals with a specific problem. The conical shape deals with the wheels staying on the track, the wheels are then mounted on bogeys that can turn freely to allow this to happen as well, and all of that supports the carriage.

Best visual explanation. Ty

Thanks for your crystal clear explanation 💛💙💚.

Me watching this instead of studying when i have a test tomorrow:

Very well explained

Extra ordinary video, thx !

Great to finally be getting a Micro Center in my state some time next year

that "exagerrated" train wheel and rails could be a cool teaching toy if its downloadable

I love engineering and architecture.

Great demonstration! Will you be publishing the print files for download or purchase? Great for teachers to print off for classroom demonstration. Easy enough to model myself - but if files already exist obviously easier No worries if not, keep up great work :)