Making a TWIN RC Wankel Rotary Engine - The Crankshaft (Eccentric Shaft)

Vitenskap og teknologi

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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  • Clayton
    Clayton5 timer siden

    Holy commercials!!

  • evildrome
    evildromeDag siden

    Lose the HSS and get yourself some VBMT finishing inserts for aluminium. These are very +ve rake carbide inserts and they are what you need to stop your surface finish in gummy steel looking like the dog chewed it. Your small lathe cannot deal with -ve rake inserts (not stiff enough) and even with HSS and mild +ve rake your SF still looks like shit. SF is determined by tool edge sharpness, rake & stiffness. There is a minimum cut pressure and if you dick with that, the tool will intermittently not cut and... well.. its the tram lines of doom for you. To avoid this you either need to increase machine stiffness (not practical), increase sharpness (for a very small machine the increase would need to be ludicrous) or increase rake. So increase rake. My machine is not much bigger than yours and heavily positive rake tooling has been a game changer for surface finish.

  • manny1782
    manny17826 dager siden

    Im a rotorhead myself and i have to say ur work is freaking awesome 😎🤙🏼

  • Nicolas Biette
    Nicolas Biette6 dager siden

    Great with périphéric ports, but you don't need join on the périphérie of rotatif piston ?(like on the real one ?)

  • Mark Kennard
    Mark Kennard6 dager siden

    Huge wow factor.. Your a real master at your craft. Thanks for posting.

  • da da7 dager siden

    This is a really expensive hobby

  • Maurizio Zanni
    Maurizio Zanni11 dager siden

    Amazing craftmanship and skills, my friend!!!

  • Максим Богомолов
    Максим Богомолов11 dager siden

    Оставлю здесь русский комментарий. Через год приду проверю.

  • она утонула
    она утонула14 dager siden


  • Slavic230984
    Slavic23098414 dager siden

    Хорошая работа

  • Tyler Deleringo
    Tyler Deleringo18 dager siden

    mmmm machining ASMR

  • Ben Ruether
    Ben Ruether18 dager siden

    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!

  • 멸망지구
    멸망지구19 dager siden

    작동 되는 모습을 보여 줘야지?

  • Andrian
    Andrian19 dager siden

    You are lucky dude, you can spend so much time on such things .. If you lived in Ukraine, you could only think where to make money for a piece of bread and not die of hunger or disease

  • 横尾ただし
    横尾ただし20 dager siden


  • Phillip Brewster
    Phillip Brewster20 dager siden

    That is some of the most beautiful precision work wow

  • rice art
    rice art21 dag siden

    so now it will drink twice more oil. Great job.

  • Никита Андреев
    Никита Андреев21 dag siden

    Never use sandpaper on turning lathe! It could be reason of your hands cutting off!

  • Helmy Setiabudi
    Helmy Setiabudi22 dager siden

    Always love to see your works. What a nice e-shaft

  • Tru Maverick
    Tru Maverick24 dager siden

    Always was curious how long those cutting/shaping/shave tools last? I was thinking like maybe 4 or 5 uses?

  • Роман Гребенюк
    Роман Гребенюк24 dager siden

    Это мотор от бензотримера?

  • Ian Visser
    Ian Visser24 dager siden

    I can imagine it'll be hella loud... Wonder what RPM it'll hit though? My best guess is around 20k rpm top end, depending on your tolerances (but you seem pretty precise, so 20k is my bet)

  • Renaissance Man
    Renaissance Man25 dager siden

    if you dont harden that crank bearing area... the rollers on that bearing will eat up the crank bearing surfaces in a matter of minutes...

  • underconstruction
    underconstruction25 dager siden

    Is this for sale

  • Барабашка Наглый
    Барабашка Наглый25 dager siden

    Нихуя не понятно, но очень интересно!

  • Pholiage
    Pholiage26 dager siden

    That is a real piece of engineering art. Absolutely beautiful

  • Silver
    Silver26 dager siden

    this makes me want to design and make an engine from scratch. I'm not wealthy though so uh. Back burner for now I guess lmao

  • Paul The Painter
    Paul The Painter26 dager siden

    That's impressive work. Do you think you could make an exact copy of a Bic lighter out of metal?

  • Nysios
    Nysios26 dager siden

    4:30 what is this thing you are tightening on?

  • Freeblowjob forall
    Freeblowjob forall26 dager siden


  • Swaroop I
    Swaroop I27 dager siden

    I mistake and it's done

  • GoatZilla
    GoatZilla27 dager siden

    Those apex seals have always seemed amazing to me.

  • illuminOz
    illuminOz27 dager siden

    Better at 2xspeed lol

  • Unknown1
    Unknown128 dager siden

    787b !!!!!!!!!!!

  • Tony Wilson
    Tony Wilson28 dager siden

    Love what you are doing where and the between centers turning is a first class. It took me a watching a couple of times to really appreciate the cams. I've been watching machining videos this year and in particular people working through steam engine kits and all of those have eccentrics to operate the valve and NOBODY has done that the way you have. They all have crank shafts to. I don't know if you are involved with the Pocket NC or not but you are their best advertisement. I know there's 2 version of it with the spindles. If you have any recommendations on that please let us all know.

  • grinrause2
    grinrause228 dager siden

    I don't understand why the middle part of the shaft (between the 2 eccentrincs) is not a cylinder? Does this shape have some double function?

  • Jesús Marín Tristante
    Jesús Marín Tristante29 dager siden

    we cant buy it? :-(

  • OTFT
    OTFTMåned siden


  • Vahid Hashemi
    Vahid HashemiMåned siden

    افرین عالی بود ،👏

  • Roberto Guerrieri
    Roberto GuerrieriMåned siden

    Spero Vivamente che lei stia cercando lavoro presso una Società da llunedi al venerdi.

  • Data is Power
    Data is PowerMåned siden

    What a craftmanship 👏👏

  • Alex Kart
    Alex KartMåned siden

    Good job! 👍 Please, normalize the sound volume before uploading.

  • AretnaP 3
    AretnaP 3Måned siden

    1:11... The "Action" of that Motor, Reminds Me of *SpiroGraph!*

  • Brady Arnold
    Brady ArnoldMåned siden

    Don’t forget to do the math for the change in seal tolerances with the reduction in size/volume of the engine. The oil film must be accounted for in clearances.

  • 황민순
    황민순Måned siden


  • zetec_influenced
    zetec_influencedMåned siden

    Your a brilliant Machinist keep it up.

  • Lt-Silencer / Ryan
    Lt-Silencer / RyanMåned siden

    thats some skill mastering

  • Hidayat Rashid
    Hidayat RashidMåned siden

    0.13B rotary 👌🏻😙

  • Nevila Llanai
    Nevila LlanaiMåned siden


  • 10 GA
    10 GAMåned siden


  • 藤福
    藤福Måned siden


  • Jason H. Hubbard
    Jason H. HubbardMåned siden

    What is the tool you keep attaching to the cam while turning itm

  • Angah Tse
    Angah TseMåned siden


  • Yu Toob
    Yu ToobMåned siden

    clickspring on steroids.. 11:15 why resin wheel, not cutoff tool?

  • Василий Понкратов
    Василий ПонкратовMåned siden


  • marcello033
    marcello033Måned siden

    This is so fun to watch Where did you get all that knowledge

  • riky virdiana
    riky virdianaMåned siden


  • Pheonix551
    Pheonix551Måned siden

    Dude you're a genius 👏

  • Standing Elk
    Standing ElkMåned siden


  • gravy is car
    gravy is carMåned siden

    the dorito

  • Siem
    SiemMåned siden

    I watch a great movie, then no sound from the Wankel. What a disappointment, I want a lot more ... I subscribe directly to the channel

  • Power Plant maintenance works
    Power Plant maintenance worksMåned siden

    we practically view rotory engine

  • GeeksWithFeet
    GeeksWithFeetMåned siden

    Can anyone tell me the purpouse of the 'arm' that gets clamped over the shaft?

  • analogaudio rules
    analogaudio rulesMåned siden

    you should find away to mass produce these for the rc hobby market, you'd make bank

  • samto samto
    samto samtoMåned siden

  • 2fast4you2
    2fast4you2Måned siden

    AND IM HAPPY when I drill a straight hole in a pice of wood with my dremel. 🙄🙄🙄🙄🙄🙄🙄🙄🙄. LOL

  • Kyle Mohan
    Kyle MohanMåned siden

    this is awesome. great work!

  • Richard Carew
    Richard CarewMåned siden

    that's the coolest thing I have seen in a month of Sundays

  • FuturisticEnderman
    FuturisticEndermanMåned siden

    Very cool johnny! I assume the flywheel will be counterweighted and the front 180 deg apart. Thinking of a twin barrel 48 ida weber rc design in my head. The rotors used to race with them...

  • Aleksey Loykuts
    Aleksey LoykutsMåned siden

    Did you try any other marking dyies? Yours seems to be very unreliable if metall gets hotter

  • Flumazenil
    FlumazenilMåned siden

    great video, good skill set

  • CAYMAN987
    CAYMAN987Måned siden

    How about a flat 6 porsche mini engine.. imagine the sound ??

  • Tamiya Fan
    Tamiya FanMåned siden

    Would you consider making kits so others can build the same?

  • Harry V
    Harry VMåned siden

    Wonderful Machining and Engineering! I learned and loved the video! Thank you!

    DEATHSTROKEMåned siden

    Generic apex seals comment, but only smaller 🤣

  • foxik20
    foxik20Måned siden

    Extremely likable !!

  • Maki Tiong
    Maki TiongMåned siden

    that apex seal is robust

  • Sanco
    SancoMåned siden

    8:33 Awesome

  • J C
    J CMåned siden

    Damn you got skills bro👍🏼

  • chris mcdonald
    chris mcdonaldMåned siden

    i sure would like to know how their fingers and hands look like they have a desk job mine are cut and banged up you can tell by looking at my hands do hard work my palms are as tough as boot leather

  • Fari MK
    Fari MKMåned siden

  • Janne Kokko
    Janne KokkoMåned siden

    great job!

  • ebutuoy6463
    ebutuoy6463Måned siden

    Does this guy know how to use a lathe....or what?

  • foxpon105
    foxpon105Måned siden

    Now put it in a mini RX 7 shell and have the coolest RC car that ever existed.

  • Fari MK

    Fari MK

    Måned siden

  • Air Rifle Tech
    Air Rifle TechMåned siden

  • A A
    A AMåned siden

    I dare u to put that engine on a rx7

  • OmikronZeta
    OmikronZetaMåned siden

    4:27 what a lovely dog!

  • Johnny Baughman
    Johnny BaughmanMåned siden

    Lots of tallent

  • Ege Elçin
    Ege ElçinMåned siden


  • Bret
    BretMåned siden

    I could watch the finished eccentric spinning on the lathe for hrs haha

  • Fari MK

    Fari MK

    Måned siden

  • Michael s Ghiloni
    Michael s GhiloniMåned siden

    Do you balance this item.

  • Michael s Ghiloni
    Michael s GhiloniMåned siden

    Why are you not taking it apart crossing the bolts of not to warp the head??????????????????


    Nice work

  • Игорь Фролов
    Игорь ФроловMåned siden

    Please can tell the radius of the rotor and the eccentricity of the shaft

  • Aiden Mitchell
    Aiden MitchellMåned siden

    @JohnnyQ90 Please put those Toyan Engines to good use on another RC car!

  • Maggo E.
    Maggo E.Måned siden

    What is the purpose of the clamp he puts on at 4:27?

  • Mazda_Media
    Mazda_MediaMåned siden

    Have a look at my channel if your into Mazda's/Rotaries.. Awesome video by the way! Subscribed..

  • Dronetalia
    DronetaliaMåned siden

    What do you think about to reciprocal tightening and loosening the allen bolts?

  • Luis Fernando Ariza
    Luis Fernando ArizaMåned siden

    Increíble trabajo felicitaciones

  • T H E J D M
    T H E J D MMåned siden

    Yesss how i saw the rotor

  • T H E J D M

    T H E J D M

    Måned siden


  • sehhi vooty

    sehhi vooty

    Måned siden

    Make sure to balance the crankshaft and rotors