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Fabricated Small Gas Flathead Engine

Discussion in 'A BEGINNER'S FORUM (Learn How To Machine Here!)' started by racecar builder, Aug 24, 2017.

  1. racecar builder

    racecar builder United States Active Member Active Member

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    Okay.

    This can be done with metal stock.

    I figured out how.

    Keep in mind this is an 'exposed' engine. Without a water jacket this time around.

    Bosses. That's the key to it.

    Hang bosses off cylinder and crankcase.
     
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  2. racecar builder

    racecar builder United States Active Member Active Member

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    Some explanation.

    I get the part where the machining starts after it's welded together.

    Keep parts parallel or square to each other.

    By jove. I think it will work.

    Okay. I will explain Bosses tomorrow. For camshaft and valves for example.

    Large engines and early gas engines had exposed assemblies. It has just fallen by the wayside.

    A little messy!:)
     
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  3. Randall Marx

    Randall Marx United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Sounds interesting. Looking forward to more of this!
     
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  4. kvt

    kvt Active User Active Member

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    I will be watching this thread with interest.
     
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  5. killswitch505

    killswitch505 United States H-M Supporter - Premium Content H-M Supporter-Premium

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    I wanna see
     
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  6. jpfabricator

    jpfabricator United States Active User H-M Supporter-Premium

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    No pictures!?!?

    Sent from my SM-S320VL using Tapatalk
     
  7. kvt

    kvt Active User Active Member

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    I'm hoping he does a lot of pics or even better a few video clips.
     
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  8. racecar builder

    racecar builder United States Active Member Active Member

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    Thank you Ken!

    Okay. Will work on some drawings.

    Keep in mind this is minimum.

    Open crankcase. You oil it with an oil can.

    It runs for a VERY short time and you shut it off.

    Idea is to just cover the major points to use this engine as a mule for better one.
     
  9. Ulma Doctor

    Ulma Doctor Infinitely Curious Active Member

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    :nail biter::nail biter::nail biter:, i need something to actually see.
    i'm going crazy trying to envision the engine
     
  10. racecar builder

    racecar builder United States Active Member Active Member

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    Thank you Mike!

    Okay. It's a plain cylinder.

    No cooling jacket and no fins.

    That ought to keep you for awhile.:)
     
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  11. racecar builder

    racecar builder United States Active Member Active Member

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    Update.

    The Flathead idea is out.

    It heats up cylinder having the exhaust port below the top of cylinder travel.

    I may not have that quite right but when I read original explanation it made sense.

    Better to just do a little extra work and make it overhead valve.
     

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