At 27:22, this set up is used in garratts we're the rear engine is travelling backwards

6:16 listen to that C&O 6 chime sing

this explanation is very clear many thanks

I think he forgot the oil valve

Took me a long time to be in the mood to watch this, but that gave me the opportunity to watch this _and actually learn something._ This is a very well put together presentation with clear explanations of everything, very easy to follow visuals, and a great narrator. Looks like I'll be giving the steam engines in train simulator another try.

Whistle at 6:18

Thank you so much! Eventualy I began to understand the details!

THE GREENBRIER AND I CALL IT BIG BEER!!!

Fantastic video. Can’t wait for the Baker video. Also hoping a Stephenson’s valve gear video isn’t out of the question?

Why 614T? The T would mean tank engine

Any videos on rc poppet vaulve gear

Very good video with excellent graphics covering all aspects of this valve motion.

Outstanding in every way! Question: Because of the area of the connecting rod, the main piston must have more pushing power in one direction. Does this matter at all?

I watched both episodes a lot earlier, but never commented on them untill now. These are superb videos when it comes to explaining locomotive valve gear and valves! I am very invested in this subject as of late and can't wait for more installments! Can we expect more valve gears like of the dual eccentric type (Allan & Gooch) or should we look forward to similar valve gears to Walschaerts-Heusinger and Baker? Will poppet/cam valve gears also be discussed? i.e. Caprotti, Franklin, etc.

Are we possibly going to see other types of valve gearin in the future? This one is excellent

No sound in video!?

Very well done 👍 did you do the animation too?

9:44 the valve gear reminds me of arthur’s one

"MOIN" as we say here in north germany... or as jock spoken south scandinavia. on the one side so interesting to me, how small our hobby world seams to be, that someone like you have entered my chanal. thank you for that. on the other side a lot of respect to your video of explaining professionally steam locomotion technology, says the german vehicle engineer and welding engineer. TO OUR HOBBY, all the best and more please....

Ummmm....I Love this video Thank you, that is all

Some more advance related subjects that would be nice to cover. For compound locomotives (e.g. mallets) is there anything to prevent the condition where the high pressure cylinder is in exhaust stage, while the low pressure cylinder has its intake blocked, or is some kind of buffer/surge chamber used to handle this ??? In the case of of locomotives with 3 steam cylinders, how is the center cylinder power and control linkages connected to the locomotive drive chain ??? Some locomotives had provisions for a 'booster', a low speed steam motor that can be located on the locomotive trailing wheels, or on one of the tender wheels to provide an addition 'boost' to start a heavy train moving from a full stop. I have not seen anything on KZbin on how these 'boosters' operate. Can something be produced to cover this ???

This is a brilliant video. Even if you "know" how the valve gear operates, this addresses the sort of things you don't think about but were crucial when Walschaerts, or Heusinger (which is how we know it here) invented the beautifully simple and effective motion. - Just want to say, there was a lot of locomotives with outside Stephenson's and especially Allan's valve gear in Austria - Hungary. I'm from Czechia and when you said it, I was like, no, this is normal and does fit quite well? :D

This is a magnificent explanation that is easily the most comprehensive and clear description of an otherwise mind boggling mechanism. I have been in awe of the Walschaerts Valve Gear (like many) with its almost hypnotic motion on a running loco; it speaks volumes of the brilliance of its inventor. I've often wondered how long it took to work out the entire design from inception, and the progression of development must have been an enlightening experience. Many thanks for the hours of work in developing this fantastic tutorial.

@1:55 Great family portrait on that C&O #54 4-4-0. What a great look back to a different era. Thanks.

cant wait to see the baker video, haven't found a good basic explanation of it anywhere

Good explanation!

These videos have been very helpful. I'd love to see more information on the frame, suspension, pilot and trailing trucks of these more modern steam locomotives (which I know isn't the most interesting or exciting topic 😄). I'm really want to understand more about what the cradle does, and how the rear weight of the cab and firebox is distributed to the trailing truck (it has something to do with "heart rockers" I believe). I recently bought a copy of the 1925 Locomotive Cyclopedia, which has tons of knowledge, but it's still hard making sense from the technical drawings. I'm debating on purchasing UP 844 1.5" scale model drawings to study and understand more about every nut and bolt of these machines. The 7.25" gauge model is so large, the designer even included prototypical frames and suspension. Studying live steam locomotive drawings has been helpful as their designs tend to be simpler.

that's way diesel electric loco makes live little bit much easier 😊

Awesome, love it. C&O my favorite ❤️ Drive it like you stole it! This engine is movin down the tracks at speed. A rarity indeed.

Wasn’t William F Howes Jr in these videos or was that 2101

Are there some plans with measurements or exact proportions available? I'd like to try such a gear in CAD.

Incredible CG animation! It's obvious a lot of effort went into this video. Thanks for creating this!

do you have any content on the H8 Aligheny steam engines, their shopings etc.

I've been looking forward to this tutorial for some time now. Both this and the previous video have given me a better understanding of steam locomotives. Thank you so much!

Going to have to watch that again. . . after I look up some terms, like “Trunnion”

Well done! Excellent simulation graphics. Looking forward to parts 2 and 3!

I need to watch this when less tired! But excellent graphics!! I'd love to know how you did them. They're fabulous!

how do you no all this stuff on valve gear

are u the same guy that does other train videos with the fence dehind him and sume train stuff on the fenc

you are one very smart man to no all this

Very interesting thanks!

Well here it is known as Heusinger gear. Got the name Walschaerts during WWI to hide the German origin. Walschaerts was 2 years after Heusinger " inventing" this gear.

This is Sooooo clever! Elegant. Excellent explanation, thank you. The model is lovely too. Congratulations to the person who put it together.

Wonderful explanation. It could explain the force of the steam when it enters the piston and how a small piston like that of locomotives can support so much weight.

Looking at the thumbnail photo, at first glance I thought it was a Soo Line O-20 Northern!

how efficient could a steam engine be made with electronic valve control?

I've always been interested in trains and steam locomotives. I assumed the workings of valve gear was beyond my comprehension. This video proves that good teaching can bridge the gap between what we currently understand and the next level. So many of my teachers were not up to scratch. As commented elsewhere, an excellent video.

U.S. METHODS ARE NOT EXCLUSIVE ! While this programme is excellent in describing the typical methods & usage of the Belgian designed Walschearts valve gear. As adopted for use in the Classic AMERICAN 2 cylinder Simples, of the Post First World War era until the end of steam. It needs to be pointed out that around the World many types of valve gear were in use. And by World War two certain more advanced & more efficient types of valve gear were starting to come to the fore, such as "British Caprotti". Further certain countries such as France had "love affairs" with "Compound" type locomotives, which required different methods and visually different equipment at the front end. In Germany the typical valve gear used was "Heusinger" itself a slightly "improved" version of Walschearts. Further Europe also had problems with limitations on the Physical size of steam locomotives. Which unlike in the USA were constrained by the size of tunnels & other structures built in the early days of railways. This resulted in some locomotives having to have not just two outside cylinders but also one or two more cylinders hidden between the frames. Which of course resulted in different methods of valve gear construction and cylinder design !!! INSIDE & OUTSIDE MULTI CYLINDER TYPE !!! Probably the best visual example of the different approach to locomotive construction each side of the Atlantic as far back as 1927. Was the invitation to the Baltimore & Ohio Railroads Centenary celebrations called "The Fair of the Iron Horse". Where the then brand new British FOUR CYLINDER 4-6-0 of the then Great Western Railways new "King" class locomotive (No 6000 "King George VI") headed the daily "cavalcade" of steam locomotives. The ORIGINAL FILM can be found here on KZbin under the title "1927 Baltimore & Ohio Railroad Centennial Celebration". The King class locomotive is seen passing the grandstand of onlookers at 20:07 in this old film. The GWR 6000 seen in the film, clearly reveals its typically British very clean uncluttered lines, the LACK of external valve gear (all hidden between its frames), and the fact it is a FOUR CYLINDER Express passenger type. The outside cylinders are clearly visible in the usual place ahead of the large (6ft 7in) Driving wheels. The inside cylinders, between the main frames, are revealed by the two polished brass round Piston covers, side by side on the front of the locomotive, just below the boiler smokebox door. Other ALIEN features to US eyes fitted to 6000, are the fact that this loco was vacuum braked. (As were most British Railways at that time) It has standard European sprung buffers, and the European "Screw Link" type coupling. It has NO boiler dome only a polished brass safety valve cover, as steam collection was done at the apex of the taper boiler where it joined the Belpaire shaped firebox obviating the need for a dome. Further, despite being the smallest loco in the parade of then modern locos that followed it around the circular track every day. 6000 developed more Horsepower per ton of locomotive than any other locomotive present at the B&O centenary fair. Thirty of this class were built, and they operated between London & Plymouth (237 miles), hauling the Worlds then longest NON STOP passenger express service named the "Cornish Riviera". NOTE: Number 6000 as seen in the 1927 film, is fully PRESERVED in full working order, and still makes mainline steam tours across various parts of Britain throughout the year for tourists to ride on these trains. As do two of her identical sisters. Indeed Britain has at over 800 steam locos in operational preservation as "Steam Heritage trains" are now a major 12 Billion US Dollars per year business. Thousands of pieces of film are posted on KZbin virtually daily, showing many of these locos including 6000, hauling train fans around Britain every year !!!

Has anybody built a steam engine with electronic valve?

Fantastic video!