Close

  • 4 cylinder ohv engine

    Results 1 to 12 of 12
      1. Kit: , by
        gbritnell
        (VIP/Sponsor) gbritnell is offline
        Builder Last Online: Nov 2020 Show Printable Version Email this Page
        Model Scale: 1/8 Rating:  Thanks: 0
        Started: 08-04-09 Build Revisions: Never  
        Not Supported

        I'll start off with pictures of my 4 cylinder OHV engine. This was my second multi cylinder internal combustion engine. I designed it myself and made a set of drawings for it. It's made entirely from bar stock, aluminum, brass and iron. The main components, block, oil pan and intake manifold are 6061 aluminum. The head and flywheel are iron. The valves and exhaust pipes are stainless steel. The water pump body, connecting rods and water connections are bronze. It has a splash oil system and full spark ignition (non glo-plug).
        The max rpm is around 6500. I say around because I just rev it and don't hold it there. The carburetor is based on the air bleed type used for RC planes. The bore is .750 and the stroke is .875. It has aluminum pistons with 2 iron compression rings. The distributor is hooked by linkage to the carburetor so that when the carb is opened the timing is advanced. It idles, if you want to call it that (1500 rpm) with the timing at about 10 advanced. When it revs up the timing goes to about 35 degrees. Here is a link to it running.
        gbritnell

        Build Photos

        4 cylinder ohv engine-4-cyl-1a-jpg  4 cylinder ohv engine-4-cyl-2a-jpg  4 cylinder ohv engine-4-cyl-3a-jpg  4 cylinder ohv engine-4-cyl-4a-jpg  4 cylinder ohv engine-4-cyl-5a-jpg 


        Show Complete First Post

        Show Your Support

        • This build may not be copied, reproduced or published elsewhere without author's permission.
          Please note: The first post will be displayed at the top of every page.

    1. hot ford coupe
      hot ford coupe is offline United States
      hot ford coupe's Avatar VIP/Sponsor
      Name
      Jeffrey
      Join Date
      Sep 2005
      Posts
      7,833
      I'm glad you decided to put up some pics of your work. I love what you did there.
      Sometimes a handful of patience is worth more than a truck load of brains. Have the courage to trust your own beliefs. Don't be swayed by those with louder voices. W.S. Maugham :)
      08-05-09, 12:18 AM QUOTE QUOTE #2
    2. xken
      xken is offline United States
      xken's Avatar VIP/Sponsor
      Name
      Kenneth
      Join Date
      Aug 2008
      Posts
      2,405
      Great to see that you have posted this engine; love the video too. Folks I saw this run at the NAMES show and it is better in real life. Post more of your work when you can.

      Keep up the great work and thanks for your help with the gears for the Model T.

      Ken
      08-05-09, 06:18 AM QUOTE QUOTE #3
    3. ScaleMotorcars
      ScaleMotorcars is offline United States
      ScaleMotorcars's Avatar Administrator
      Name
      Daniel
      Join Date
      Aug 2005
      Posts
      2,983
      WOW!!! Thanks for posting your motor.

      I was just looking at the Holt engine you posted to the gallery. Can you tell us how you cast the distributor cap. It looks like its actually made from Bakelite. And do you do your own iron/aluminum casting 4 cylinder ohv engine ?
      08-05-09, 10:09 AM QUOTE QUOTE #4
    4. Don Garrett
      Don Garrett is offline United States
      Don Garrett's Avatar Asst. Administrator
      Name
      Don
      Join Date
      Sep 2005
      Posts
      5,953
      Thank you sir, I really have no words to describe how inspirational your post was for me. ;';;';
      Grandpa McGurk.....Steppin' Large and Livin' easy.
      TDRinnovations.com
      08-05-09, 10:30 AM QUOTE QUOTE #5
    5. gbritnell
      gbritnell is offline United States
      gbritnell's Avatar VIP/Sponsor
      Name
      George
      Join Date
      Jul 2006
      Posts
      244
      Thanks for the accolades. Rather than overlap my projects in this thread I'll start a new one on the Holt. There's so much to tell about it that it needs a thread by itself. I have many WIP 4 cylinder ohv engine 's for the Holt so as time permits I'll post them with a detailed description of the work.
      gbritnell
      08-05-09, 10:56 AM QUOTE QUOTE #6
    6. Don Garrett
      Don Garrett is offline United States
      Don Garrett's Avatar Asst. Administrator
      Name
      Don
      Join Date
      Sep 2005
      Posts
      5,953
      The stage is yours......
      Grandpa McGurk.....Steppin' Large and Livin' easy.
      TDRinnovations.com
      08-05-09, 11:00 AM QUOTE QUOTE #7
    7. gbritnell
      gbritnell is offline United States
      gbritnell's Avatar VIP/Sponsor
      Name
      George
      Join Date
      Jul 2006
      Posts
      244
      The distributor cap is actually a piece of 'plastic' type material that has a real high electrical quality to it. It's some type of phenolic material. It seems to work real well and doesn't carbon track inside the cap. As far as casting 4 cylinder ohv engine I don't do any of that. I was trained as a metal patternmaker so I have the knowledge but at this point don't need another hobby. I prefer to scratch build 4 cylinder ohv engine most of my stuff, it takes longer but I've been doing it so long it almost seems natural to do it that way. Casting 4 cylinder ohv engine is a good way of doing things if you plan to make more than several copies, much the same way as making resins for model cars.
      gbritnell
      08-05-09, 11:46 AM QUOTE QUOTE #8
    8. leo
      leo is offline United States
      leo's Avatar Member
      Name
      leonardo
      Join Date
      Nov 2010
      Posts
      1
      First of all let me say , AMAZING ! you have incredible skill, i am looking at maybe starting a simple one cylinder ohv engine but i need to ask you what do you use to feed power to the distributor ? is it some kind of capacitor ?
      if you could please enlight me on this little detail ,
      thank you!
      11-08-10, 11:34 PM QUOTE QUOTE #9
    9. gbritnell
      gbritnell is offline United States
      gbritnell's Avatar VIP/Sponsor
      Name
      George
      Join Date
      Jul 2006
      Posts
      244
      Hi Leo,
      The original distributor had a set of points in it. I started out with an ignition system that consisted of a 12 volt automotive coil and a couple of ballast resistors to operated from a 12 volt motorcycle battery. It was a conventional system but miniaturized.
      Then came electronic ignitions operated by 6 volts. The nice thing about them was that they were small and weren't affected by any resistance in the points.
      The final iteration of the ignition is a fully electronic setup consisting of a Hall trigger with a timing wheel similar to the full sized distributors of the 70's. Once the bugs were worked out it has proven to be a very reliable ignition.
      George
      Attached Images Attached Images 4 cylinder ohv engine-distrib-1-jpg  4 cylinder ohv engine-distrib-3-jpg 
      11-19-10, 12:59 AM QUOTE QUOTE #10
    10. kanelos
      kanelos is offline Greece
      kanelos's Avatar Member
      Name
      kanelos
      Join Date
      Jun 2013
      Posts
      2
      [B]hi my friend.. this is amazing....can you send me all the projects I have to make and dimensions; I would try make one .. i want make one ..i likeeee[/B] ... if you can sent me pics on my e-mail: [B] kanelos7@yahoo.gr[/B]
      [B]thanks[/B]
      06-02-13, 06:01 PM QUOTE QUOTE #11
    11. kanelos
      kanelos is offline Greece
      kanelos's Avatar Member
      Name
      kanelos
      Join Date
      Jun 2013
      Posts
      2
      hi my friend.. this is amazing....can you send me the projects I have to make and dimensions I would try make one .. i want make one ..i likeeee ... if you can sent me pics on my e-mail kanelos7@yahoo.gr thanks
      Last edited by kanelos; 06-02-13 at 06:12 PM.
      06-02-13, 06:10 PM QUOTE QUOTE #12
    « German 88 mm Flak Gun in 1/20 scale | 5 cylinder radial of my own design »

    Tags for this Thread

    Bookmarks

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •  

    Forum Rules

    Quick Scale Calculator

     
    Scale Calculator   Scale Factor   Real Size:     + Deluxe Scale Calculator
      1: th   Which equals Convert measurement: Reset or clear:  
      Any Scale   Scale Size:     + Deluxe Metric Calculator
     
    Top