Hello everyone, I am one of the founders of KFiRST and the designer of this QJ steam locomotive HO scale model.

@user-ub9ig2re5j

5 ай бұрын

Do you have plans to make LV-class locomotive, which was the prototipe for QJ?

@trevorgwelch7412

5 ай бұрын

I would like to see all metal G scale modern locomotives and rail cars . No plastic . Wouldn't that be cool

@christianperry1390

5 ай бұрын

Does Kfirst have a website I would love to look at all the products you offer but I can’t seem to find a website

@pavansingh2303

4 ай бұрын

*Is this really steam locomotive, or battery operated ??* 🤔🙄🤨🤥

@naguoning

4 ай бұрын

看到了你的KZread寫了sandtable覺得你應該是中國大陸人（台灣人把 layout翻譯成場景）。我只知道IOMON和百萬城的HO型QJ。可以問一下這台 是哪一個工廠生產的？

I am a member of Kentucky Steam and we now own RJ Corman 2008. It was donated to us along with the glass building.

@SMTMainline

6 ай бұрын

Has the locomotive been moved yet and are there plans to run it again? I’m guessing the boiler certification has long expired?

@Ryanstumpie1

6 ай бұрын

@@SMTMainlineI’ve been told that there are plans to restore it and run it, but the engine has yet to leave its current location at the RJ Corman engine facility in Lexington, Kentucky.

@michaelquinones-lx6ks

6 ай бұрын

@@SMTMainline Thank you for responding to my comment.

@Parktonman

6 ай бұрын

Wish Kentucky Steam would take over The Kentucky Railway Museum.

@therectorrailroad2716

6 ай бұрын

@@SMTMainline it is still sitting in RJ Corman’s yard in Lexington because we currently do not have enough space to store it. We are currently working on getting all three of our shop tracks open so we can store it.

Mr corman is an absolute legend here in central Kentucky 2008 was bought as a “collectors item” and was operated from 2008 - 2013 when Rick died hasnt run since and has been sitting at they’re Lexington Kentucky yard It was donated to Kentucky steam heritage corp in 2020 and while it hasn’t moved yet a return to operation is possible depending on its condition

@SMTMainline

6 ай бұрын

I was amazed by Rick Corman’s story, its a true American dream. I hope they succeed at getting No. 2008 operational. It looks rough at the moment and I suspect the boiler certification has expired.

@Railbrony

6 ай бұрын

@@SMTMainline if I remember right the engine ceased operation before it’s 1472 expired, but sitting for a decade might be a good idea to look it over

@buzzsaw5475

6 ай бұрын

I saw a video about this man and his company.. He was one of the best! such a giving man, who definitely remembered where he came from . his workers loved him, and he did alot for preservation of rail history..God Bless!

Iowa Interstate also owns 2 QJs as well (they were acquired in 2006 and didn't change much aside from having US modifications like a bell and handrails; also Kentucky Steam now owns RJCC 2008

@joeblow5214

6 ай бұрын

Kinda also symbolic of Iowa's past relationship with China.

@Cole2OO5

4 ай бұрын

As someone that has lived in this state for a long time, didn’t even realized we still owned one of these things

RJ Corman actually either sold or donated their QJ locomotive to the Kentucky Steam Heritage foundation from what I heard. I understand that after they finish restoring C&O 2716 it will be restored sometime afterwards. They seem to be building up a line of steam engines to restore as I think they're supposed to work on a Nickle Plate Road steam engine as well as L&N 152, which is owned by the Kentucky Railroad Museum just like C&O 2716.

@therectorrailroad2716

6 ай бұрын

RJ Corman 2008 was donated to Kentucky Steam. 152 is being restored by next gen rail solutions, which is a company started by KSHC chief mechanical Officer, Jason.

@Railbrony

6 ай бұрын

2008 was donated 2716 is on a long term lease 152 will be sent back to krm after some work is done and 587 is just being stored for a private owner

@SMTMainline

6 ай бұрын

I hope that’s successful. I believe it was donated in 2020 and there’s a video of it from the same year where it looks pretty rusty.

@Railbrony

6 ай бұрын

@@SMTMainline other engines have sat longer and still been fine, I’m not too worried

Chinese steam locomotives just look insanely good, especially with the styling.

@MilwaukeeF40C

5 ай бұрын

They look really nice and industrial if they have less of the gaudy decoration.

@henrywang3977

4 ай бұрын

Maybe due to the compact design adapting the axis-load limit and clearance limit, and the proportionally large firebox for better steam generation and being compatible with low quality coal.

@Samuel_Wong5672

4 ай бұрын

I am from mainland China. In the 1990s, in front of my house, QJ-type steam locomotives passed by more than a dozen times every day. The appearance design of Chinese steam locomotives was inspired by the Soviet Union and Germany, predominantly black and red, with minimal decoration. However, there were many specially designated locomotives with unique markings.

The B&SVRR here in Boone, Iowa, brought over a Chinese steam locomotive in the late 1980s. It's still running, it just completed its 1472 day inspection late summer last year. I got to see it run several times last year.

@MilwaukeeF40C

5 ай бұрын

I read that was a replacement for one that was spilled in to the ocean, but someone else had already imported it and it was available.

I remember back in 2005 I was granted permission to come to RJ Corman's Rupp Yard in Lexington, KY because a family friend knew an engineer who worked for Corman at the time & I got to ride in the cab of GP38-2 #3801 & drive it across the yard after we filled out paperwork to come onto the property. I was only about 5-6 years old at the time, it was such a fun time. About a year later, I saw a NS & Conrail diesel pulling a steam locomotive across the local crossing of our hometown & I yelled for my parents to come look. Sure enough, it had the Corman banner on the side of it & we knew it had to be Old Smokey on it's way to Rupp Yard. It was the only time I have ever gotten to see Old Smokey in reality, & I am so glad it's slowly getting the recognition the locomotive desperately deserves. I look forward to seeing what comes from this project!

@SMTMainline

16 күн бұрын

Thanks for sharing this story. I really hope the locomotive can be brought back to working order

I'm glad you were able to find an HO scale QJ. Bachmann made them at one point, but never offered them in America like the SY 2-8-2.

@SMTMainline

6 ай бұрын

I've seen some before. I heard the quality wasn't great.

@randyoehling303

6 ай бұрын

That model is badass

@randyoehling303

6 ай бұрын

Where did you find that Harrison?

I grew up in Iowa in the 80s, I remember when they got the steamer from China. I think we went to see it on a school field trip or it might have been with the scouts... I am sure it affected my love for trains but maybe not much since I mostly have diesels.

Hey! Was literally talking to my dad about the QJ Corman owned-he used to work on a QJ when he lived in Guangzhou, China. He was 16-17(?) at the time and I LOVE to talk to him about it.

@SMTMainline

6 ай бұрын

What a connivence. What was his role working with the QJs. Driver, conductor, maintenance?

@reddishraindrop2482

6 ай бұрын

⁠@@SMTMainlineHe said he was the boiler boy-made sure boiler pressure was at the right level. He also did clean up when they arrived at their final destination, but other than that, he worked with a couple other engineers to keep the engine afloat.

@dnlmgchysln6477

3 ай бұрын

Wow. That’s where I’m from

Your channel is my favorite for model trains. I especially enjoy the repair videos. Kitty says we have a runner! Meow.

Very nice looking locomotive! I always thought the black and red was a nice combo for the locomotive!

@yellowstonethepony7769

6 ай бұрын

Then you'll love German steam locomotives for sure

@Skibidtoiletnumber54

6 ай бұрын

Ya that’s why I’m such a fan of German locos

@MilwaukeeF40C

5 ай бұрын

The 52's, L's of Russia, and QJ's all seem to share some design history, and ended up being the final notes in steam production and regular service. Does this make them what steam was finally perfected to?

what a beauty, amazing addition to the collection SMT!

Enjoying the varied camera angles you have brought to this video

The R.J. Corman RR sometimes runs through my town every now and then and I love their red and white scheme

@DeadlySpoon12

6 ай бұрын

Mine too! I’m in North Carolina just outside of raleigh

German high-end steam engines in H0 sometimes not only have pulsed steam but also steam out of the cylinders.

@Gloomendoom

6 ай бұрын

I have a couple of old Hornby locomotives dating from the early 1970s that have pulsed steam. The smoke generator incorporates is a little gear driven piston to crate the puff.

@chriswade7470

3 ай бұрын

I’ve a couple of Marklin locos with pulsed steam

I saw a number of QJs running over Jinpeng pass and other places in December 2000. the ones I saw didn't have enclosed cabs with doors even though the temperature was minus 24 degrees celsius. The only one I travelled on certainly didn't have a glazed roof, and I don't recall seeing them on the rare occasions I was looking down on them. They were very powerful and sure footed I never saw one slip even with a 7,000 ton coal train. Very often they ran double headed. The 2-8-2s were still made to order in October 2000, but by then they had stopped mass producing them on a continuous production line.

@SMTMainline

6 ай бұрын

I feel sorry for the crew having to drive one of those when it was -24c. Hopefully being near the boiler helped. It must have been something to see these things live in person.

@henrywang3977

4 ай бұрын

The tractive effort of QJ is worth like 320 kN. Many main lines in China can regularly have up to 20‰ slopes, and sometimes up to 25‰, while the axis-load limit is usally 20 ton or 25 ton. So locomotives are to designed with maximised tractive efforts using a limited axis-weight.

i live 2 and half hours from where they started RJ Corman and i have seen the QJ sitting at RJ Cormans yard in Lexington Kentucky.

@SMTMainline

6 ай бұрын

Hopefully they move it soon. I saw a video of it from 2020 and it didn’t look great.

@lucaspendley231

6 ай бұрын

Yeah. But the Kentucky steam heritage own it now and have plans at some point to move and get it back running

Hello SMT, really love the video. The brand Kfirst is a fairly new Chinese brand(I think) they are not owned by ChangMing, I really look forward to the conversion to RJ corman 2008 but I believe 2008 have a 6 axle tender and the model you got have the 4 axle tender(Kfirst also makes 6 tender axle version too).

A strong influence of the Soviet railway industry is noticeable, especially in its wheels. The 4-8-4 class P36, oh man, what a machine!

@SMTMainline

6 ай бұрын

From what I understand, the United States was exporting ether 2-10-0s or 2-10-2s to the east until WW1. After then the Soviets made their own design based off the American models, later handing the designs over to China.

@Sormovo

6 ай бұрын

​@@SMTMainline Chinese QJ very close to Soviet LV class

@lucase.garcia8026

6 ай бұрын

@@SMTMainline Interesting!

Very nice. Seen videos of Iowa Interstate's QJ working freight. Boone & Scenic Valley in Iowa has a Chinese 282 JS class that they imported about the same time. New York Susquehanna & Western had also ordered a JS but either it and the ship it was on or just the locomotive is somewhere on the bottom of the Pacific. Air horns were surprisingly common on steam locomotives towards the end of steam. Heard a story about one of the more famous railfan photographers as a young man had borrowed the family car and set off to the other side of the state to photograph the last of the NYC Niagra 484s. Sat trackside the better part of the day photographing nothing but diesels and with time to be home by his promised time running short he was starting to consider packing up and heading for home. As he was about to start packing up CTC lit the eastbound track up green so he figured to risk fatherly ire to wait for one more train. After a bit he hears an air horn blow for a couple of crossings up the line so at that point it's another diesel powered train as far as he knows and packs his gear and as he gets a couple blocks away looks in his rear view just in time to see the Niagara roll by.

@SMTMainline

6 ай бұрын

I could see how it would be easy to mistake it. I've heard the GS4's horn before and even though its stock, it still doesn't match in my mind.

Very Nice locomotive SMT! I'm planning on getting a Bachmann China JS Class 2-8-2 steam locomotive to resemble the one on the Boone & Scenic Valley Railroad in Boone, Iowa.

A massive amount of us can agree that this is a very beautiful steam locomotive

You know it’s a good day when smt uploads

@Dr_D0nut

6 ай бұрын

I’m the first comment on this comment

@mercuryoak2

6 ай бұрын

No your not who cares...

The horn is literally a nyc subway horn sound

I can watch and listen to your new steamer "work" your layout all night!!!!!!!!!!

This was a great video Harrison, maybe one day you should look at getting some Australian HO locos specifically from Queensland 🚞

Can’t wait to see the modifications to this, really nice locomotive

Good unboxing. Very impressive steam loco. Never seen one quite like this. From Texas

This is a beautiful engine, i definitely need to find an ho scale foreign locomotive at some point after i finish building my canadian steam fleet lol. I love your videos, keep it up

That really is a great locomotive and runs fantastic can’t wait to see it after it’s modified 👍

Good evening Harrison. I just watched this video followed by another you did a few years ago titled, Strangest Lot of Locomotives I Have Seen, But They’re Great. In that video a fan sent you several locomotives including an N scale Kato which looks a lot like this one. Thanks Jeff

Very very nice! I had the Bachmann version of a QJ but they are very notorious for having zinc impurities causing the frames to rot. But now that this company makes this one you shared, I might take an interest in finding one!

@KFiRST-Y

6 ай бұрын

If you want the QJ model of KFiRST, you can contact me.

Great looking locos love them!

That's a really nice locomotive. I can't wait to see it when you complete it.

That engine is awesome. I also like your collection of lamps and lampshades. They add a unique feature to your layout.

@SMTMainline

6 ай бұрын

I just added them because they were supposed to be thrown out but I think they add an interesting style to the layout.

Harrison That is such a cool Chinese steam locomotive you got and it even smokes good!

We love this train, our favourite locomotive so far! 🚂👍🏻

For something that’s not Broadway Limited, that’s impressive.

Hello there that looks a great locomotive happy modelling all the best from here in the UK 👍

That model is in such nice condition that I would just keep that one as is and try to find a model of RJ Corman 2008.

Hi Harrison that is so cool you got a QJ steam locomotive. I watched your video were you finished your friends sons layout and i thought it was really funny what you said about that old school car and how Cruela Devil would have space on this layout. When i was a kid i thought the De vil was french. I can't wait to see the QJ again. Jacob.

Great video. Cool steam locomotive and thanks about the history of it

The name KFiRST originates from a legendary steam locomotive - KF1, which was China’s only main line steam locomotive with axle arrangement 2-4-2 back then. The KF1 steam locomotive was designed in China and built in Britain. KFiRST is committed to developing Chinese train models conforming to NEM standards, to the promotion and popularization of DCC technologies. The N-scale Shaoshan 7C electric locomotive model is now on the market, which is the first N-scale Chinese locomotive model, with a digital sound version simultaneously on sale. We have put another HO-scale Qianjin (QJ) steam locomotive model on the market, which is the first steam locomotive model equipped with synchronous sound and smoke effects in China. What is worth noting is that this product, by accurately detecting the motor speed, truly simulates the smoke and steam in four puffs at one cycle of the driving wheel. The main components of the locomotive, such as boiler, chassis, tender body and so on, are made through zinc alloy die casting process. Pipelines and most of the details are made from separate moulds, and so the model is full of rich details. The unique design of the transmission mechanism makes it possible to get rid of the gearbox between the boiler and the chassis. This model boasts rich lighting and sound effects, and delivers excellent running performance so that it can easily travel through complex tracks and points. KFiRST will focus on the development of more high-quality Chinese train models in the future.

@class77sncb

6 ай бұрын

Were can these engine H- Scale QJ be bought ??

@tonyburgess7773

6 ай бұрын

Are these available in UK, or HK?

That is a beautiful steam locomotive, I've got to get one one of those!

I've actually gotten to ride on a the Iowa Interstate locomotive, pretty fun experience honestly!

@SMTMainline

6 ай бұрын

I’d love to see it in person one day. I heard they plan to rebuild it.

Wonderful Video I like when you unbox and run locos.

This a really awesome model, great stuff!

That is a high end model. Very impressive.

Really nice locomotive. Seems to be good quality good luck with it

Very impressive. Thank you for sharing the video.

That's quite a model, SMT!

Hey, I was just looking at these on ebay... Great minds think alike.

Bro’s social credit is going up after this banger

@SMTMainline

6 ай бұрын

Yeah I'm sure the CCP will love the bit where I talk about turning it into an American loco 😂

That's a really nice locomotive such realism, And you can make that a tourist railroad railroad train.

I’m Chinese, and my grandfather used to work on the railroad with these steam monsters. Really happy to see people abroad interested in these locos. Also a fun fact: the last steam locomotive in service in China retired early this year. It’s a JS 2-8-2 working in a mine in Xinjiang Province. So you can see that Chinese railway replaced steam locomotives quite fast and the high speed rail do has seriously high speed.

@SMTMainline

4 ай бұрын

Was the last one part of the Sandaoling operation? I've seen videos of that place. It must have been something to work with these locomotives. Hopefully they bring RJ 2008 back to operation

@chandlerdecker3807

4 ай бұрын

@@SMTMainline Yes it is Sandaoling! So sad steam locos retired there. It is also hard to bring RJ2008 into service or operate a heritage railway because Sandaoling is like a deserted coal mine so not much people visit there. Most of the visitors are film crews or photographers. But as I know in Tieling, Liaoning Province a special train tour is held and pulled by their local steam locomotive (forgot what number it is). You know, special steam train tours.

That train looks super cool!

That model would be based on a pre 1980 built QJ because after 1980 all newly built QJs were equipped with six axle tenders.

@SMTMainline

6 ай бұрын

This specific one was made in 1972. I wish I could have found a 1980 or later however this was the closest one I could find to No. 7040.

@Trainsbigandsmall

6 ай бұрын

@@SMTMainline Nice man! Also here is my video of the 2001 Canadian Pacific Holiday Train with 2 AC4400s in Toronto at night.

Really nice model, and surprisingly has decent sound. So many trains toys/models out of China have the same repeating generic sound that gets really annoying that I half suspected that this loco would have that too.

IAIS has their QJ's running occasionally. I really enjoyed them as the steamed through Geneseo to Bureau and back.

Very nice model ! 👍

There were two new Chinese 2-10-2 locos imported to the U.S. by Iowa Interstate. Later, R J Corman purchased one of those two from Iowa Interstate. So now, Iowa Interstate has one and Corman has the other. There have never been three in the U.S., only two.

@SMTMainline

5 ай бұрын

With all due respect, that's incorrect. Iowa interstate imported locomotives No.7081 and No.6988. RJ Corman separately imported No.7040 and later renumbered it as No.2008 so there are 3 QJs in the U.S.

That is one beautiful engine. Sounds good too.

R. J. Corman RR is in the next city from me. They several locos on display including some F3s.

A great find. Hope it will be easy to change over

Nice looking model

Nice buy! The Chinese QJ is a real legend.

WOW! Looks rather good!

Great 👍 👌 to end the weekend nice train 🚆 Nice different smoke stack coming from the vet

The Iowa interstate has a couple of those and if I recall correctly the Boone and scenic valley railroad also has one. I know they have a Chinese locomotive though. Very cool video Harrison keep up the good work. today's my dog cookie's birthday so he's watching this with me haha

@garysprandel1817

6 ай бұрын

B&SVR has a 2-8-2 JS from China but they got their's about the same time as the QJs came over.

@SMTMainline

6 ай бұрын

I’ve seen pictures of Boone and Scenic’s loco, I believe its from 1989. Happy birthday to Cookie 🎉

@spencercorby4571

6 ай бұрын

@@SMTMainline thanks, hopefully you can get one to look like the Iowa interstate ones, and for fun get a long string of grain hoppers and call it "the Iowa special" we love our corn here.

Very beautiful locomotive !

aloha Harrison. yes you're correct Iowa interstate did have qj in their fleet. great shots of the layout I haven't seen before

Engine sounds good from here not bad

China was producing steam engines all the way in to the 21st century, the newest known Chinese steam locomotive is a C2 class narrow gauge built in 2015, crazy to think there are steam locomotives in regular service that are less than 10 years old. There's been an attempt to get a C2 class built in 1988 working on the Ffestiniog railway in Britain as well.

@RacingAnt

6 ай бұрын

Ffestiniog are still making steam locomotives...

@herborty8658

6 ай бұрын

@@RacingAnt And others in the UK like the A1 trust.

That is a cool looking locomotive

i love how you know everthing but keep up the work and i feel left out because i dont have a ho train or any train

@SMTMainline

6 ай бұрын

Everyone has to start somewhere. No one starts anything as an expert.

Interesting, I might be interested in getting one of those. I visited China in 1987 to photograph steam. Our tour saw and or photographed somewhere around 600 steam locomotives in three weeks. At that point there were numerous standard and narrow gauge examples still operating in the country, and Datong and Tang Shen were still building steam. However, by then Datong was only building JS Class Mikados, QJ production having ended in 1986, and all steam production ended in 1988. Operationally, the crews were as likely to use the air horn (yes they did sound like the one you have) as the whistle (which were air-actuated, so no twilling), and the Chinese do not use bells. The top headlights were Mercury Vapor, like street lights, and headlights were pretty much only used after dark. What I would really like to find a model of, and I don't think anyone makes a model of one, is a Polish OL49 Class 2-6-2, which is what I ran on the Wolsztyn Experience 15 years ago. If anyone knows of such a model please reply to this comment.

@SMTMainline

6 ай бұрын

Thanks for sharing your experience from when they still used these. I found this one on eBay. Apparently K-First is a new manufacturer.

@ScaniaVabis580

6 ай бұрын

​@@SMTMainlinewould you have a link please? I can't seem to find one with that short 8 wheel tender in DC / DCC only AC 3 rail sadly. What's your plan with the tender by the way? (The R.J.C. has the larger 12 wheel)

Changming and KFirst are two different companies, KFirst is a relatively new manufacturer who has produced two models so far, this HO QJ and an N scale SS7C electric.

boutta buy that! that thing is awesome!!

How about that. RJ Corman runs very near where I live. Looks awesome!

3:49 I was there for the unloading and first part of the Corman QJ project. The irony is at the time it was the newest locomotive on the roster being built in 86.

@SMTMainline

5 ай бұрын

I wasn't aware of that. It seems especially funny considering it was named "Old smokey"

Could you make a video on what you use to clean/take apart/lubricant your locomotives? What tools you like and your process

What a dope locomotive!

It looks very nice!!

Great video nice unit

I don't have a train set since i dont really got the money to get em but this certainly look so cool to have

Hi, thank you for the video. Regarding the extra set of wheels: this is prototypical. The center axle on the QJs didnt have flanges.

I live in Kentucky just a few minutes drive to the real RJC 2008. Hopefully it will run again if KSHC can get the time and funds to do so after 2716 is finished.

Neat! It certainly is different Harrison, enjoy

The coupler choice is smart. The shaft is the NEM standard and can accommodate European British and American coupler heads

This is soooo amazing, thankyou!

@SMTMainline

3 ай бұрын

Glad you like it!

Now some N-scale train model manufacturers in China are also beginning to increase the details in the cab.

We have one of those locally. Iowa Interstate Railroad and Boone & Scenic Valley both have one.

I have seen the synchronized smoke before. MTH HO locomotives use it. I have their Union Pacific 4-12-2, and it has that on it. A model I can recommend.

@asteroidrules

6 ай бұрын

Makes sense that MTH would do it. Synchronized smoke like that is fairly common in O scale which is MTH's bread and butter.

@OriginalBongoliath

6 ай бұрын

So has Broadway Limited since their Paragon 2 days.

@exarkun42

6 ай бұрын

@@OriginalBongoliath I can't speak for Paragon 4 units, but the smoke units in the Paragon 3 engines aren't great

All I can say is just wow.

Jinpeng pass in winter was the best place to see them in December 2000. 14 trains a day struggled over the pass going round and round in big loops of track to get over the hill. All but one train was pulled by QJs. In the freezing cold even the steam pusher that moved coal forward in the tender put out 10 times more "smoke" than the smoke on the model. The one l travelled on had two firemen, l think one was a trainee. There were three crew and 4 visitors in the cab, a very spacious cab. I think some had automatic stoker's but they didn't use them as they were unreliable. Google Jinpeng or Jitong line to see them. The German mark is just a mark to say they meet German quality or safety standards, not the place of manufacture.

TBH im always amazed to the quality of geman made HO trains, they are the best at it i think

@seppehens8459

6 ай бұрын

lovely engine tho with so many extras that you usualy only see on O scale

Very nice locomotive Harrison! The pulsing smoke feature has been on BLI and MTH steamers for awhile. It's pretty much a given that Scaletrains will carry on that feature after purchasing the tooling from MTH back in 2021. Fyi: Scaletrains has announced the first of those locomotives to be released will be N&W 611 as well as the matching passenger cars, with the official unveiling sometime during the first part of this year.

@KFiRST-Y

6 ай бұрын

The motor module integrates the motor leads and two Hall elements for detecting the motor speed.The two Hall elements are arranged on the base board at a 45° angle.On the flywheel of the motor there are two symmetrically arranged magnets, which scan through the Hall elements, and the Hall elements send off a signal to the main board, at an interval of 0.25 turns between two signals. Since the transmission ratio of the locomotive model is 1/25, when the motor rotates 25 turns, the driving wheel rotates 1 turn. To make the sound effects four times at one turn of the driving wheel, it needs to detect the motor running by 6.25 turns. There is a counter on the main board that records the signals from the Hall elements; each signal is 0.25 turns, and when 25 signals are counted, the counter sends off a signal to the decoder. In this way, precise synchronization between the driving wheel and the sound effects is thus achieved. The sound and smoke synchronization technology is unique from KFiRST.

Wow thats really impressive