Verical hit and miss engine

Discussion in 'A Work In Progress' started by Brian Rupnow, Jun 15, 2019.

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  1. Aug 18, 2019 #201

    Jmccrack

    Jmccrack

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    Brian
    Please let me know how i can get a set of drawings for you hit and miss
    Tks
    Jerry McCracken
    PS Here is a pic of my car. 5 year build started driving it last year. 34 Ford
     

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  2. Aug 18, 2019 #202

    dnalot

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    I am curious to here how your cylinders and rings worked out. I saw in your build that you lapped the cylinders. Did you leave them that way or did you need to rough them up a bit to seat the rings.

    I had my eyes fixed as you did and it was life changing. I can see perfectly far but need readers for up close. 1.25 power for general use but when at the lathe or mill I keep a pair of 2.5 and 3.5 power readers.

    Thanks for another informative build.



    Dnalot
     
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  3. Aug 18, 2019 #203

    Brian Rupnow

    Brian Rupnow

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    Aostling and others wanted to see how this engine reacted under load/no load conditions. I don't have any machinery designed to have a varying load, but I did want to show him and others how a varying load affects these model hit and miss engines. So--Turn up your speakers, click the video link, and set back and listen.---Brian

    [​IMG]
     
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  4. Aug 18, 2019 #204

    Brian Rupnow

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    I lapped the piston into the cylinder and made no other change to either, other than to add the cast iron rings. Engine has extremely good compression. I think the engine would have ran equally well if I had given about.001" radial clearance. The rings work great. Anyone wanting plans, go to Paypal and put $25 Canadian funds into my account under brupnow@rogers.com and be sure to send me an email giving your name and which engine you want plans for. As soon as Paypal notifies me that the funds are there, I will send you a package of drawings as .pdf files. there are about 70 drawings, and some of them are multiple sheets.---Brian---Jerry McCracken your car is beautiful!!
     
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  5. Aug 18, 2019 #205

    Brian Rupnow

    Brian Rupnow

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    I just listened to my video, and noticed that I spoke in error. The engine under load hits every other stroke, same as any four cycle engine, not on every stroke.
     
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  6. Aug 18, 2019 #206

    CFLBob

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    Brian, do you know how much power the engine generates? Or given the bore and stroke, I could guess.
     
  7. Aug 19, 2019 #207

    Brian Rupnow

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    Bob, I have no idea. Some people are asking me to make a Prony brake set up to measure the power, but I'm not going to.
     
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  8. Aug 19, 2019 #208

    ShopShoe

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    Brian,

    You probably remember this, too: When I was a kid and the farmers were elevating square bales of hay up to the haymow with the old farm elevator, the engine running it would sound like that whether working or idling. Of course, the "newer" farmers had a PTO driven elevator, or one with a Briggs and Stratton engine.

    --ShopShoe
     
  9. Aug 19, 2019 #209

    Brian Rupnow

    Brian Rupnow

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    Actually, no. I don't remember, but that's mainly because there weren't all that many farms where I grew up. Once I moved away from home and went "down south" to Belleville, Ontario, the farmers were using electric motors on their bale elevators.
     
  10. Aug 20, 2019 #210

    cds4byu

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    Tell me how heavy that hunk of steel is and I will give you an estimate.
     
  11. Aug 22, 2019 #211

    Brian Rupnow

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    I am now in that "post building slump" that always follows a successful build. The engine worked great, started and ran almost the first time I tried it, and ran well. I did manage a video showing the engine running under load conditions while lifting a weight. Rather crude, but it did the job. I have had numerous ideas for making a machine to drive that has a variable load, but that is not as easy as you would think. It would have to cycle in and out of the "load" side automatically, but can not transfer any load back into the engine when being ran in the "no load" situation. --In other news, I got stung by a damned bee yesterday. I was mowing my lawn with my garden tractor, when I felt a small "jab" in my right hand. I looked down at my hand and seen a big yellow and black bee, and immediately gave my hand a shake to knock it off. The bee drilled me, and damn, did it ever hurt. I haven't been stung by a bee since before my dad died, so it had to be over thirty years ago. I'm not allergic to bee stings so finished cutting the grass and came in the house and held an ice cube against the sting for an hour until it finally quit hurting.
     
  12. Aug 22, 2019 #212

    Brian Rupnow

    Brian Rupnow

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    If I do build something with a variable load. I want it to be fully automatic. The problem is that when you slow something down enough that it can be easily seen, the motor gains a great deal of torque advantage. When the motor gains a great deal of torque advantage, then you need an even heavier load. And whatever it is, I don't want it to be much larger than the motor. I also don't want the machine to "feed back" to the engine when the engine is in it's "no load" side of the sequence.---thinking---thinking--
     
  13. Aug 23, 2019 #213

    Gordon

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    How about an air compressor with an air operated clutch. Build up pressure and the clutch disengage. Bleed off some pressure and the clutch reengages. An air compressor is just an engine.
     
  14. Aug 23, 2019 #214

    werowance

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    maybe some sort of grain grinder or mill. when you drop a hand full of hard dry corn kernels in it puts a load on the engine until it s ground through it? then enjoy a pan of cornbread afterwards?
     
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  15. Aug 23, 2019 #215

    Brian Rupnow

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    Here she is boys, my mother 99 years old today. That handsome (slimmer) fellow with her is myself, turned 73 in July. Drove up north and had a little birthday party at the senior citizens manor where she lives. Good time was had by all, my back is sore--driving 400 kilometres will do that.
    [​IMG]
     
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  16. Aug 24, 2019 #216

    Moper361

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    Brilliant Brian she looks very happy to see you .
     
  17. Aug 24, 2019 #217

    el gringo

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    Dummy cannot understand how to make the oval hole in the carb?
    Raym
     
  18. Aug 24, 2019 #218

    Brian Rupnow

    Brian Rupnow

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    ElGringo--After the tube is soldered into the carb body, set the carb body up in your milling machine vice and after picking up the center of the main air passage in the carb body use an endmill of the specified size, plunge cut a circular hole thru the tube . Then just offset the spindle in one direction and plunge cut thru again. Then offset in the other direction and plunge thru again. That will give the oval hole.---Brian
    [​IMG]
    [​IMG]
     
    Last edited: Aug 24, 2019
  19. Aug 25, 2019 #219

    Brian Rupnow

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    I'm in thinking cap mode this afternoon. As the engine sets right now, there are only two ways to adjust the speed at which the engine kicks in and out of "hit and miss" mode. One is by changing the weight of the governor balls, and the other is by changing the strength of that light green spring on the vertical cam shaft. I think the governor balls are very close to the correct weight right now. The light green spring is a real pig to change, requiring almost complete disassembly of the cam shaft and brackets. However--If I were to add a third factor into this, I believe I could fine tune the kicking in and out of "hit and miss" mode. The way the engine works right now is that once the engine reaches a certain speed, centrifugal force makes the balls fly outward away from the cam-shaft (as it is shown in the model). The cams on top of the governor arms force the grey governor thimble upwards, compressing the light green spring and in turn makes the dark blue "hit and miss lever" rotate and end up underneath the rocker arm, which prevents the exhaust valve from closing. It works great, but I have no control over when this happens. If I were to make the yellow bracket which bolts in place with two of the head bolts, then I could tap a hole in it, and add the bronze colored adjustment screw and lock nut. The spring from a ball point pen would be Loctited to the bronze threaded adjustment screw, and the other end would bear against the dark blue "hit and miss lever". Any pressure applied to the "hit and miss lever" by the spring would counteract the force applied by the light green governor spring. This should give me the ability to fine tune the rpm at which the engine kicks in and out of "hit and miss" mode.
    [​IMG]
     
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  20. Aug 26, 2019 #220

    dethrow55

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    well happy birthday and many more my mom is 99 and will be 100 april 12.
     

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