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  1. H

    Tests of CDI Ignition Modules

    And specifically what units do they use, and is the same frequency and conductors the same in both cases and are you implying that faradays law disappears because there is a larger gap in the core. And as a matter of fact you can indeed couple inductors that look like transformers. So define...
  2. H

    Tests of CDI Ignition Modules

    Not much energy is in that core. That is the difference between an inductor and a transformer. But believe what you wish. I havent seen anyone measure it. What you just said makes no sense. they state it but they cant prove it.
  3. H

    Tests of CDI Ignition Modules

    No, Sorry not contradicting myself. The math proof clearly proves the energy is stored in the air gap. You are beating the wrong drum. Well the symbol means that whatever is stored in the core is infinitesimal to that in the air gap. Obviously you wish to argue the energy is in the core not...
  4. H

    Tests of CDI Ignition Modules

    No, I did not miss understand the math or that statement. You need to evaluate the math of where the energy is. Look closely at the two transformer types and the resulting calculations. I have other simpler proofs that do not go into as much detail as this one. In fact look at the proofs...
  5. H

    Question from Hoppy

    I suggest that whatever position your eyes should be above the work for a full field of view. You might want to consider where your controls are located for easy access to the emergency stop or for that matter any control switches. Might consider lowering the equipment to allow you to use it...
  6. H

    Tests of CDI Ignition Modules

    You can derive mathematically that the magnetic energy is stored in the air gap and only there. The air gap can consist of a voids in the material or a created one. There is a difference in a saturated core and an unsaturated core. There are two types of transformer designs and they both have...
  7. H

    Tests of CDI Ignition Modules

    You might want to consider theory around a fly-back transformer. When a core becomes saturated the magnetic field is distorted around the gap in a ferromagnetic material. This distortion will collapse yielding an additional energy. You will find a flyback transformer on CRTs. I just removed...
  8. H

    Tests of CDI Ignition Modules

    Thank you for the reply. One of my hobbies is ham radio and I have recently been going down the rabbit hole of magnetic circuits. There is a transformer called a fly back transformer that stores energy in a gap in the ferromagnetic coil used to boost the voltage with a smaller size transformer...
  9. H

    A question about flash boilers....ish

    An IC engine is quite different as the heat is leaving with the hot gases. This allows the cylinder wall temperatures to stay fairly constant. Water has a very great capacity to absorb heat and even in boilers there is a delta on the tube wall of a constant 70 to 100 degrees But I suspect it...
  10. H

    Tests of CDI Ignition Modules

    Don: I have for some time considered building a small magneto to obtain a hot spark. I would not be able to gear it to the crank but it would have to be modified with an electronic sensor and a coil. How small of a footprint would I have to make it for it to be practical. The issue such a...
  11. H

    A question about flash boilers....ish

    My opinion but its fairly strong based on experience. Not a good idea. One of the most violent explosions I have seen was due to extreme fluctuations in temperature. Cast iron expands and contracts as all metals do. The forces generated are very high and exceed the mechanical properties of the...
  12. H

    Tests of CDI Ignition Modules

    Thanks for the reply,, Keep up the interesting research HMEL
  13. H

    Tests of CDI Ignition Modules

    I have been following this thread with great interest because I have a Bantam engine from about 1930 equipped with a set of points and the ability to ****** or advance the ignition. I have an idea what it would take to get it to work but because of its age I have no confidence I could get it to...
  14. H

    Taking it up a step---

    I think it is important to understand what a vernier is and what it is not. It was originally set to help estimate the distance on a scale when the measured mark fell between two marks. The vernier is dependent on the pitch of the major scale and there is a specific mathematical formula to...
  15. H

    Newbie needs advice about a lathe

    Yes, there are at least two I know of in the surrounding area. However, insurance companies frown on such installations and the approach is to build an outdoor unit and transport the heat into the house via glycol heating or hot air ducts. I have a cast iron wood burner which is acceptable...
  16. H

    Searching for milling machine

    Your selection of a milling machine should consider its spindle for tooling along with the travel in x,y,z. There are at least three or more choices for the spindle taper. What you have to consider is what is the largest part you want to make. The parts are usually smaller then the what you...
  17. H

    Gear Train Retainers

    I agree, but I think the drive gear on the lead screw will have to be removed to allow the dc motor to run free of the spindle. At least on my lathe it would have to be disconnected somehow.
  18. H

    Gear Train Retainers

    I understand your frustration when someone tells you its your fault that you were not aware of a detail like a e clip. I find it sort of an insult. To get around the issue another lathe with a more convenient system would probably been at least a 1000 dollars more. So there is that issue...
  19. H

    Is diesel oil compressible ?

    Here is one of the better explanation of the design of an injector. You have to listen to what this man says as he is reluctant to share actual design calculations. But there is no reason what he has done can not be duplicated. Most importantly he describes why he is doing what he is doing.
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