Walschaerts valve gear demonstrated with LEGO

Using LEGO, I demonstrate the principles and workings of Walschaerts valve gear. I am not an expert on this so if you see any glaring errors, please tell me in the comment section.

[@redshoebox]

Turn on subtitles for extra information. I hope this teaches you something about Walschaerts valve gear and steam lcomotives. I am not an expert on this so if you see any glaring errors, please tell me in the comment section.

[@michaelbujaki2462]

Railfan here, no errors that I can see.

[@jakeandfriends3554]

There is one the cilinder and valve are the wrong way round the valve is meant to have 2 and the piston 1

[@BeightonJunction]

I just built something like this But it runs on a vacuum cleaner!

[@mrplanebuthedied6165]

BRRRRRRRRRRRRR

[@Eagerston]

😂

[@UnionCountyPhotography]

See es ex

[@numero7mojeangering]

Believe me don't make something too fast or else it will explodes and the vacuum cleaner will sucks the parts.

[@smallenginesgarage7168]

@@numero7mojeangering you can just take them out

[@neiloflongbeck5705]

The cylinder used for driving the wheels has a single double faced piston head and the valve gear has a H-shaped head, which covers the entry port allowing steam in and out.

[@ddegn]

Oh no! This channel has lots of cool videos. I'm already subscribed to too many channels. Subscribed.

[@redshoebox]

Thanks for the support!

[@prosanis1216]

It’s beautiful how you explain how this Walschaert mechanism works but it’s even more nicer to look at it and how you visualise this in Lego. Thank you for sharing this with me love it 👍👍❤️🙏

[@redshoebox]

Glad you enjoyed it!

[@daikimitani3851]

Return crank not 90° , Inside Admission but rotating in the reverse direction. piston and valve also strange

[@redshoebox]

Thank you for the feedback, I am not an expert in this so constructive criticism is always good.

[@DixieRailVideos]

Quit foaming bro

[@vladivosdog]

cringe

[@kreator4life]

oh so that's how steam locomotives work.
very interesting

[@Abe8816]

Mechanical engineering is the best

[@redshoebox]

Agreed.

[@xNate08]

That’s cool

[@redshoebox]

Thanks

[@noaharmistead7433]

Dude, this thing is really tasteful :D

[@gregmallitt]

excellent my only comment is the valve should have the double spool and the piston the single

[@baileydevries4494]

A man of culture i see

[@nickryan3417]

Very cool and while I don't know much about them I was expecting the two piston valves to work in opposite directions to allow continuous drive through them and to allow the progress of one to reset the other? Obviously not necessary when driven by a wheel but the piston valves are the sourve of the drive in the real thing.

[@jacobotoole2105]

Awesome dude

[@redshoebox]

Thanks

[@Slavicplayer251]

now i actually want a to make a mini steam locomotive

[@crazy71achmed]

Very nice modell, but the direction of travel cannot be changed. :)

[@victorg9974]

Very instructive thank you

[@redshoebox]

Glad it was helpful!

[@laaity]

The sillinder valve and piston is swiched

[@LS1sLegoGarage]

So in this demonstration I assume the bottom moving part would be the valve and the top would be the piston?

[@redshoebox]

Either that, or the piston is at the bottom and the train should be moving backwards.

[@LS1sLegoGarage]

@@redshoebox alright, thanks

[@StaxRail]

In an actual locomotive, the valve is the top part, with the piston underneath.

[@LiEnDoc]

Отличный стенд!

[@austinsus13194A]

yes i indeed see a glaring error in this
it is not powered by air

[@redshoebox]

Yeah, this is just a model but I might turn it into an actual engine.

[@thegrandestbazaar4800]

Very good

[@redshoebox]

Thanks

[@Amadeus2231]

you should make one powered by pneumatic cylinders

[@doomchap7614]

Now to build the rest of the train

[@FuelFire]

now build a steam locomotive that can run.

[@redshoebox]

Good idea!

[@cloudedarctrooper]

Yooooo I wanna build something like this on the scale of lego trainset rails

[@redshoebox]

Yeah, this scale is big enough to have realistic geometry.

[@flatzrigerson7475]

Reminds me of Gordon's pistons

[@THESLlCK]

steam goes in one side and then the other, causing the piston to reciprocate, interesting

[@modinproductions]

Wait are train wheels in real life also geared together or solely by the linkages?

[@redshoebox]

I'm pretty sure in real life there are no gears, instead each wheel is connected to a metal shaft connecting to the other set of wheels on the engine, the engine on the other side is timed out of phase to prevent dead spots. I could be wrong on this, but that's my prediction.

[@therosijedha]

@@redshoebox Modern locomotives just use axles and motors

[@crazy71achmed]

@@redshoebox That's correct. The two coupling rods function like you "predict". :)

[@crazy71achmed]

@Patrick Modin No. Gearwheels were much more expensive than coupling rods. ;)

[@bryanshomeprojects]

Nice. Just sub👍

[@redshoebox]

Thanks!

[@Xx_95kene_xX]

Cool

[@mkaali]

Why is it called piston and valve when they have identical function?

[@redshoebox]

Because the valve controls the steam flow that creates an oscillating motion from the piston.

[@rx8tom]

Sweet example! Are there any benefits to this compared to a cam 90 degrees offset?

[@redshoebox]

I'm not sure, I am not an expert on these things. When you say cam, you are talking about the return crank, right?

[@rx8tom]

@@redshoebox I guess I mean a separate timing crankshaft offset 90 degrees actuated by a valve. It would be a lot simpler, but not as cool looking.

[@avro683lancaster7]

I'm fairly certain the benefit comes in the form of being able to adjust the ratio of the Expansion Link's lever. If the Radius Rod is connected to the top (2 holes up) of the Expansion Link rather than the 2 holes down as in the video, it would invert the action of the valve, thus causing the cylinder to drive the wheels in reverse.

[@iCore7Gaming]

That's apart of a train?

[@martenschut9262]

where did u get those wheels?

[@redshoebox]

They are LEGO motorcycle wheels, I found them on bricklink.com.

[@hellothere4396]

Instructions pls👌

[@redshoebox]

I can do a tutorial on this if you would like, you can also try looking at the different clips in the video to build it yourself too.

[@hellothere4396]

@@redshoebox okay thank you👍

[@HenryBoiProductions]

I wonder how you made it...

[@redshoebox]

Just trial and error along with a bit of research

[@El-Burrito]

I don't know what I'm looking at but I know it's cool. Looks like steam train wheels

[@redshoebox]

Yes, it is an accurate linkage of a steam locomotive.

[@sk8forlife651]

hi redshoebox (im lazytoggled)

[@redshoebox]

Hi

[@sk8forlife651]

@@redshoebox hi

[@CristiNeagu]

Makes you wonder why Lego never released a steam train...

[@redshoebox]

Probably because the wheels I used are motorcycle wheels and a train at scale is too big.

[@Bambuskus505]

Now make it steam powered lol

[@Wreckedftfoxy]

frick your a couple hours late getting to my inbox i already made a piston setup for a steam engine its like the walschaerts valve gear and a bit of gwr slider mechanism and a bit of my own

[@Sean-gu8yn]

Wheel.

[@redshoebox]

3 wheels, actually.

[@laaity]

😂you put the piston valves where the piston should be

[@Ben-Ny]

🤷‍♂️

[@youngblood_2672]

double penatration

[@themechbuilder6171]

lol

[@bartender_billy6229]

what an unfortunate name lol "wall sharts"