Making a TWIN RC Wankel Rotary Engine - The Crankshaft (Eccentric Shaft)
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- Опубліковано 21 лис 2020
- Ever since I made the video with the starter modification on my O.S Wankel engine, I wanted to make a multiple rotor assembly. Last year, I found a second one, new on ebay and I didn't lose the chance to buy it. I know many of you will ask me why not a 3 or a 4 rotor engine? It would be absolutely crazy and beautiful, but the cost is really high (almost a grand each) and the complexity is much higher for my skills. We'll start with the 2 rotor and if it works we can dream. Making this crankshaft was quite the task, because due to it's thickness, when the diameter started decreasing on machining, it kept bending slighlty. I was constantly checking with the dial indicator, and the best I could do was to finish the part with 0.02 runout. I could have used a steady rest, but I don't have one at the moment. Also one of my concerns is that I won't heat treat it as it would bent to the point that it'd be unusable. Heat treating is not an option for me unless there is some secret I don't know.
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Somewhere Rob Dahm is commissioning a 4 rotor version of this.
Mini 787B...
thought exactly the same thing. lol
I mean i got two to sell. So there is that
Or cursing on the fact he’s calling it a crankshaft instead of an eccentric shaft
He should commission this guy to make it for him.
"Hopefully brap and not bang"
😂😂😂
Hopefully brap brap brap brap, bang bang bang
That is the essence of engine building my friend!
Should be on a T-shirt
SNIFF
Rotarys are the princesses of engines, they are absolutely gorgeous, but they aren't easy to please😂
Just like the arrogant girls of high school 😂
Absolutely loving this project, would love to see a fully custom engine from the ground up. You do such a good job machining that I'm sure it would outperform any of these things on it's own.
Im so fired up about this serise because I love rotary engines
Yasss🔥
These are Wankel engines
@@sandervanderkammen9230 is rotary version of an wankel engine bro
@@duhasslicheskleines-9790 which version of the Wankel engine???
@@sandervanderkammen9230 there are only 2 version is a small wankel and a rotary but i do not think that rotary is wankel engine tho but its what UA-cam says😛
can't wait for singleturbo 4 rotor awd rc car on double wishbone suspension with cantilivers
And full custom tube chassis
Rob dahm is this your throwaway
@@potatoesalech5476 i wish i were him
If he built something in 1/5 scale, that rotary would be perfect size wise
ua-cam.com/channels/SBmpA68bC8BTsD7MHZdMAQ.html
You've given me so much inspiration over many years. Watching your projects grow in complexity and your technique as well has been a pleasure. This was a great video and a superb piece. Can't wait for the rest. Bravo!!
I always wondered how eccentric shafts were machined in lathes and this just answered my curiosity alongside showcasing a cool project. Props to you.
Oh yes , the man did it. Cant wait to see more , a mini 13b !
Screw that, how about the 4-rotor 26B, used in the Mazda 787B?
@@rogerhu126 yes pls
@@rogerhu126 how about twin 20B 3 rotor's + a 26b 4 rotor to make a 10 rotor ???
More like a 0.013b
@@SWTH71 👍
Am i the only one that is legit blown away by seeing something eccentric and something that is made by the lathe turning so incredibly fasinating to watch?
No lol that's the whole point of his channel 😂
@@michaelsaalwaechter9889 I think this is the first time on his channel that i have seen where he makes a crankshaft on video.
@@rasmus1600 yeah true, I was just messin haha. It's pretty crazy. 👌
That's why it's called an eccentric shaft and not a crankshaft.
@@jjmac3561 every crankshaft is eccentric, the purpose is to make the forces other than rotary.
But it is just awesome to see it spinning freely on a lathe, it gives a better view of how it works.
I dont really think people watching this video of your complexity engineering craftsmanship and how much went into the fabrication to FULLY understand......how fantastic this is and to give you credit for hard work. Amazing
This is so awesome!!! I was blown away when you got the off center crankshaft machined. Can't wait to see the final product!
It takes a lot to impress me on UA-cam, and this does. I use to own a 87 RX-7.
So relaxing watching you realizing your little dreams...
Thank you my friend ❤
Brilliant. Brings back fond memories of my time spent in the toolroom during my engineering apprenticeship…..many years ago now😀
First time I've watched one of your videos, and what an excellent first watch it was! Subscribed as I don't want to miss the next episode of this intriguing build
Congratulations, really a job with great precision, any mistake can condemn the piece.
Vc por aqui, admiro este e o seu canal abs
@@PressStartChannelUA-cam Valeu, são velhos conhecido desde 2012.
Why are you not making any more videos? I'm eager to watch.
@@PressStartChannelUA-cam ฤฟ
@@kabali0079 Thank you, my video frequency is only one video per month, I have a lot of personal commitments and they do not allow me to increase my productivity yet, but we will see in 2021, I believe I will be able to produce more videos.
Leandro Wagner.
i don't want to be that guy but its an eccentric shaft
also when it's done and is off-center its soo satisfying
Hah, came down to the comments immediately when I saw this video to check if someone had already commented about this 😆
Was just going to say this
No problem being 'that guy' because it isn't a crankshaft as you said it is and eccentric shaft. Might as well get it right for those who don't know ;-)
I’ve always called the E shaft a crank shaft. No difference really.
@@jamesford3549 its not tho?
I love watching you work, you're clearly a very skilled machinist
now this is why i f'n love this channel. building tiny engines and modding em. so satisfying to watch.
"You don't have the right tool to do it, make the tool too"
Nice work!
It's incredible when someone finds their true calling in life
The Wankel Rotary is a beautifully designed engine and well suited to your beautifully machined parts. I can't wait to see the rest of these!
Your level of manufacturing RC parts is the thing I dream about!👌🏽 Love to adjust/customize/build RC parts/cars but this is a whole new level.🤯 Love it! Consume all your videos with the greatest of joy 🤗 but always left hungry for more!! Can't wait to see how this turns out! Keep it up!!👍🏼👌🏽🥳
Dude, i have to say that I watched the whole ad just for you, great work !
I've really enjoyed seeing your improvement over the years.
Yeah in the first videos the his drill press kept thrilling me out with the huge woobel but now preciousness lathe work he really improved a lot
Beautiful machine work, as always. I wish I could find someone who works on regular motors that puts so much care into their work.
Awesome tooling. Love the eccentrically machined crank lobes. They looked freaky when spinning in the lathe. Well done.
YESSS ANOTHER ROTARY VID!! Great to know well actually have the machining process now... saving this into my rotary playlist as I’m going to have to make myself one of these some day
Wankel... not Rotary
@@sandervanderkammen9230 it is a rotary engine. It has a dorito. All Wankel engines are rotary. They’re called wankels because that’s the inventors last name.
@@averagecarguy420 I'm going to assume you are novice on this topic, and amateur fan perhaps.
There are TWO TYPES of Wankel engines... one designed by Felix Wankel and one designed by Hanns Paschke and Walter Freode.
Only one of the two different types is a ROTARY TYPE engine and this is not that type... this is easy to determine because it has a rotating eccentric-crankshaft.
Any questions son?
@@sandervanderkammen9230 no questions and I’m not an amateur. I build engines for fun. I’ve been watching him for over 2 years. I also experiment in machining and fabrication. These engines are known as wankel rotaries and have triangle shaped rotors. True rotaries are airplane engines with pistons and cylinders, but a stationary crankshaft. There are two types of rotary, the dorito type and piston type.
@@averagecarguy420 Thanks for confirming my suspicions.
Any expert on the Wankel is aware of the two different types.
Only the DKM-54 is a ROTARY TYPE engine.
The engine in this video is a Wankel KKM-57, this is the non-rotary version and is clearly distinguished by the rotating eccentric-crankshaft.
The Rotary version of the Wankel has no crankshaft or flywheel.
Any questions?
Awesome video! You know roller bearings require an Rc60 hardened surface. Since you started with 1045 steel, you could heat just the eccentrics red, then spray with water to quench, all while spinning in the lathe. Then, straighten any distortion, and polish the eccentrics.
Amazing work! This is the kind of finished part, that without ever having seen somebody show me how its done, my layman/ non-machinist mind would be FOREVER stumped as to how in the hell one goes about producing such a thing on a lathe.
Absolutely impeccable work. Honestly, I'm still impressed every time I see a rotary engine. It feels like those seals shouldnt last a day
Seriously you should start producing cranks for these engines, id buy one
Hand manufacturing is not economically feasible. But, if you get a eccentric shaft designed in Fusion 360, you could probably get a CNC shop to bid on making you multiple quantity for a reasonable price. Probably a minimum of 10 for about $5,000 USD including setup fees and materials.
ua-cam.com/video/UtiZU9ucjM4/v-deo.html
9:08 was so satisfying to watch.
A hundred years ago I was on the Mazda race team....this is one of the coolest things I have ever seen! Well done!
Lot of time, skill, patience and money goes into making this stuff. Gotta give them the respect they deserve.
Άψογη δουλειά όπως πάντα 😎
Οχ
хаххах ну привет)
το ηξερες και συ οτι ειναι ελληνας, τρελε
@@dougdemuro4384 ναι ναι !
UA-cam finnaly recomended this channel to me I dont know what took them so long
I'm so envious of your skill, patience and precision. Great job bro...
Watching the lathe alone made the video worth it.
Time to get one already
Up next: scaled down v10 for go cart use
Now thats what ima talkin about
With 2 turbos From a smart
search for keith57000 he's built a 1/3rd scale V10 RC car
@@malakiblunt that sounds freakin amazing
@@malakiblunt its sweet as f. But hes not got it running on the v10 yet does he?
I really like watching you on a lathe. Im no machinest but it's really hard for me to comprehend the ammount of skill this took to make.
Well to be true it isn't that hard (the most exhausting part is to make no screw-up and to keep up the attention) I have learned all the skills too during my apprenticeship (in the German system which is really good especially in any craftsmanship) I mean i have learned to work by hand (file) in a tolerance of 0.1mm, to use a Milling machine and lathe also I did lern how to MAG and oxy-fuel welding as well as soldering oh and basic heat treatments I had also courses in pneumatic, e-pneumatic and hydraulics that all just to be caster/Foundry smelter
@Cory Gill the only reason I don't do same thing similar is purely I leak fundings for tools and materials (also film equipment)
But the work behind that what u see Is the hard part really the planing of the steps and oder of operation is the most exhausting part
Also I have seen his video for quite a long time (before he had the lathe) and man I haven't sayed I could it do better I'm just saying it takes less than a year to have an huge amount of skills In craftsmanship if u have a apprenticeship in Germany (if u learn for a job that has to do with any craftsmanship)
And to ur grandpa well after many years he know many tricks as machine operator but if u show him that he will say same thing similar the "skill" needed to operate a lathe is not very high but the knowledge needed for the planing is a huge part also I have casted multi million dollar parts to but u probably don't know anything about alloys and the property's of molten metals or there classifications
Seeing that finished eccentric is mesmerizing and beautiful
I am 67 years old. My Grandfather was a tool and die maker. (He used to design and build the weird machines you see on 'How It's Made'.)
He gave me a pile of Briggs and Stratton motors when I was five years old. They were all running when I was ten years old. The incredible wealth of knowledge that I learned in those years, about tools, mechanics, logic, and the internal combustion engine was the foundation of my life's success.
At ten years old, I was proficient on the metal lathe, and learning the Bridgeport mill.
I was privileged to teach computer maintenance courses for six foreign countries and NASA. I installed and maintained the VAX 11750 for ASAT (Ronald Reagan's Star Wars Project).
Excellent! Always love the amount of "precision" You use in your metal-work on here! Lookin Great so far! Keep it up! :-)
Love this "brilliant" comment :D
ua-cam.com/video/4DqoQq1zME8/v-deo.html
@@DKTAz00 your "WELCOME"!!! LOL.
@@menom7 lol
After you get this finished, you should challenge Rob Dahm to an RC race.
hahahaha
Rc car would win
The RC car won't break down atleast
I wanted an O.S rotary so bad years ago. They always caught my attention in the Tower catalog, but where expensive and meant for planes which I never got into. Amazing work building a two rotor! Hoping to see more in the future!
I love watching your videos. I’d really love to have your machining and fabrication skill. Very impressive as always.
The part would require grinding after heat treatment. You def won't get the results you want machining to final dimensions and heat treat after. Would need to machine the part to larger than final, heat treat, then finally grind down to exact dimensions. Not sure if you have a grinder setup, usually pretty specialized. I'm sure though that there is someone or some company out there that could do it ezpz. But yeah, not easy, not straight forward to heat treat AND have good tolerances. Also a side note, most/all? crankshafts are forged not cast or from bar stock. The re-arranging of the crystal structure from forging helps significantly in the part's strength and durability.
Should port that thing haha. I love the rotary motor. You should try to do the bigger ones, there even more fun.
Not much parts besides seals.
I have had both a turbos rx7 and a n/a
fun thing about that rotary nitro engine is that it comes with peripheral intake and exhaust ports instead of side intakes and peripheral exhausts that a 13B would have had, so its like its ported as much as possible from factory
A true master home machinist. You make it look so easy. for me I always seem to end up under sized, out of round or make an error so bad I end up scrapping the entire piece usually after several hours were invested.
Your work blows my mind every time.
Distortion during heat treatment is unavoidable, more than not heat treated parts need to be finished by the grinding process, its the only way to achieve a high degree of accuracy. Nice work btw.
...maybe make an RC version of a certain infamous vette that a certain Dahm owns? ;)
This guy is incredible... rotary!! 💪 I’m still amazed by all that precision machining.. love all your videos sir💪💪👍👍💯
This is completely out of my domain but I still enjoy it, and for a moment i wished that this didn't end. Completely satisfying.
Much Love ♥️
11:12 it sound like Christmas song :)
😊😊😊😊 yeah
i though about 2001: A Space Odyssey x)
Sounds like apex seals failure..
I could feel that in my teeth.
More like that one grand opening thing you see at the start of movies
Was it paramount? I forgot
shit that off center work holding was clever as hell! thoroughly impressed
I've watch many of this guyxs builds. He's an absolute genious.
this is freaking amazing. fantastic work. i cant even comprehend how its all done. so complicated. and the final result is absolutely beautiful. i love rotary's, cant wait to see how this build goes :)
HOLY SHIT DUDE!!! That's crazy! That is so cool watching the excentrics being made. Weird to see them sitting perfectly still while the rest of the shaft wobbles all over the place
What is that weird cast iron clamp thing you put on the bar stock?
It's called a lathe dog and it's purpose is to transfer the torque of the chuck into the workpiece sitting between centers
@@C2H5OHist 🤣 no shit...I know it's called a lathe. Im referring to the CAST IRON screw clamp thing wrapped around the bar stock that he is milling
It's called a "lathe dog"
He wasn't saying "it's a lathe, dog" the part is actually called a "lathe dog" 😂
😂it’s literally called a “lathe dog”. He wasn’t saying “it’s called a lathe bro”
"Hopefully Brap and not bang" 😂😂😂
Your work is amazing. I enjoy watching you make custom parts
Fascinating to watch! Very talented!
I am not dissing your choice of project, but I think you should build a dynamometer to test all your previous ones. Also it would make tuning custom intakes a breeze
For the heat threat send it to this old Tony
That is a real piece of engineering art. Absolutely beautiful
I couldn't stop looking, between the shiny metals and the movement of those shapes on the lathe ..
a drug. 😅🤤
I definitely should have been asked if I was 18 before watching this
Yes, “hopefully Brap and not bang”😂👌🏾
Thats incredible. Really impressed with the precision
I recently discovered your channel and I couldn’t be more impressed
rc rx-7 incomming
you can send parts to be heat treated professionally, but it's really expensive, especially just for that (being so small)
So why don't you make more to make it cheaper
It would cost right around $20 for heat treat, and $40 for vac heat treat, on a part that size.
@@xenonram as little as that? I thought you just pay for the process and size dosn't matter (unless ia huge ofc).
He’d said something about the first part bending like crazy because he put too much heat into it while machining and that he was worried about sending this one to be heat treated and it warping, as well
@@cj15941 he said he was worried about heat treating it himself. If you send it off to get done properly then bending should be negligable.
nice to see people being creative during those times, the best rc project out there right now i believe m8, am sure we'll see it running soon, in the end is precise workmanship what you do, can't go wrong with that
The things you do are incredible and this is no exception.
*takes out the apex seal*
Me: huh, so that's what they're meant look like...
When will we see a dual bank rotary engine?
didnt the mazda car were 3 "piston" or whatever?
@@Francois_Dupont what?
@@Francois_Dupont You mean the 3 rotor 20b Mazda rotary.
@@mickmuzzmkmz1628 13B rotary for the RX-7 i think. its got 2rotors instead of 3 i was thinking.
@@Francois_Dupont Yes 13b is 2 rotor.
In love with this build. Can't wait for more.
Amazing machining skills to achieve complex rotational parts! 💜
**happy rotary braps**
4 rotor 🙃
And make a working model of Rob Dahm's Ahura!
That is some of the most beautiful precision work wow
Always love to see your works. What a nice e-shaft
I don't own and have never worked with any of this equipment but I find it absolutely fascinating. I've been subscribed to your channel for years and love watching your work. Great job. Keep up the good work.
this is incredible to watch you machine the crankshaft
Wow that crankshaft came out beautiful.
I have to hand it off to you. The amount of precision required in order to get the correct tolerance is amazing.
Na that isn't so hard on a lathe but the planing before the work is important to not mix up the order of operations
very satisfying to watch you work!
You got the skills to pay the bills my friend!! No question!! Absolutely love it!!
I thoroughly enjoy watching your precision and dedication . I must say though I would have thought you would have figured out a way to motorize your cranks on the milling machine. LOL
You are true pleasure to watch. Thank You for these videos!
偶々鑑賞したけど、なにこれ！すっげ～～～！。機械工学とか全く縁がない俺でも見入ってしまいました。
Gday Johnny, that crankshaft looks beautiful, can’t wait to the next video,cheers Matty
Very clever. I'm 50 years a precision machinist. Great job!
Huge wow factor.. Your a real master at your craft. Thanks for posting.
That's a beautiful piece of work
Amazing craftmanship and skills, my friend!!!
I cannot wait for this. This is something I've always dreamed of doing.
Very cool. Can’t wait for the next part. The counterweights are important.
Damn man you make this stuff look easy. This is by far one of my favorite channels. Phenomenal work 👏.