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  • Off grid LPG (propane) powered Battery Charger

    This is one of the most thorough instructables I've seen. Excellent job!

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  • liquidsands commented on danthemakerman's instructable Kiridashi Marking Knife3 months ago
    Kiridashi Marking Knife

    In answer to the question about the reheating of the metal, i can shed a little light on why. The type of steel he used in this instructable is a very high carbon steel. It is a very superior product for this knife making work because the temper or hardness of the steel is adjustable. Heat starts the process but the speed of cooling is what completes the process. When the steel is heated the carbon distributes within the molecular structure of the metal. If you air dry the metal very slowly the carbon stays distributed in the metal and the metal gets soft and "workable". You can then drill it, shape it etc. If you heat it again and quench it in water it cools so fast that the carbon is attracted to the thermal shock and makes the surface of the steel so hard that you ca...see more »In answer to the question about the reheating of the metal, i can shed a little light on why. The type of steel he used in this instructable is a very high carbon steel. It is a very superior product for this knife making work because the temper or hardness of the steel is adjustable. Heat starts the process but the speed of cooling is what completes the process. When the steel is heated the carbon distributes within the molecular structure of the metal. If you air dry the metal very slowly the carbon stays distributed in the metal and the metal gets soft and "workable". You can then drill it, shape it etc. If you heat it again and quench it in water it cools so fast that the carbon is attracted to the thermal shock and makes the surface of the steel so hard that you can't even drill through it. This surface hardening is called case hardening. Case hardening may cause the majority of the concentrated carbon to form within 1/64th to 1/32nd of an inch from the surface or even less. This makes a very hard but very brittle surface coating and the knife blade would be much more susceptible to breaking. Although it can still be ground on a grinder you risk losing a lot of the high carbon material to grinding dust, thus weakening the overall strength of the steel and the rigidity of the knife to malforming. By heating the steel to high temp and cooling it quickly but still slower than water such as in oil, the carbon is slower to reach the surface and thus gets distributed through a much higher thickness of the surface material limiting the brittleness and making the steel much more resistant to bending or breaking. It also makes the steel still workable for sharpening and holding an edge. If you feel that the steel is a bit too close to case hardened, you can then again "anneal" the metal by controlled heat at a much lower temp and soaking it in the even heat of an oven over a longer soak time, thus allowing the carbon to redistribute a little and strengthen the steel at the same time. Annealing also de-stresses the metal if it has been hammered or welded making it more resistant to failure in holding an edge or breaking the blade.

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  • liquidsands commented on jessemckee's instructable Make a Note Box with a Japanese Lock9 months ago
    Make a Note Box with a Japanese Lock

    THE LINK NEVER CAME THROUGH, THANKS FOR TRYING

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  • liquidsands commented on jessemckee's instructable Make a Note Box with a Japanese Lock9 months ago
    Make a Note Box with a Japanese Lock

    Very beautiful work, but as an instructable it was unclear. With just a couple pics of only part of the components and no labeling on the images, I wasn't able to follow the construction steps and have no idea what the other parts look like such as the lock and lid mechanism. Regardless, beautiful woodwork!

    Couldn't find any animation link...

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  • liquidsands commented on petercd's instructable Hydroxy Gas Generator9 months ago
    Hydroxy Gas Generator

    Frankly Peter, I appreciate your efforts. This is a very hotly disputed subject with pluses and minuses for both sides of the discussion. For my part I have had successes with my HHO (using your choice of term) generators and failures. For those who are not paranoid close-minded and can listen, the claims of more fuel than the fuel it takes to make it is impossible. The fact that hydrogen gas burns so much faster than gasoline and an injection of H into the gasoline mix causes the flames in the cylinder to burn more efficiently thus turning a 70% wasteful engine into a potentially 50-60% wasteful engine DOES mean you would use less fuel and save money in the end. The gain is in making more of the fuel injected into the engine burn instead of getting blown out of the tailpipe like i...see more »Frankly Peter, I appreciate your efforts. This is a very hotly disputed subject with pluses and minuses for both sides of the discussion. For my part I have had successes with my HHO (using your choice of term) generators and failures. For those who are not paranoid close-minded and can listen, the claims of more fuel than the fuel it takes to make it is impossible. The fact that hydrogen gas burns so much faster than gasoline and an injection of H into the gasoline mix causes the flames in the cylinder to burn more efficiently thus turning a 70% wasteful engine into a potentially 50-60% wasteful engine DOES mean you would use less fuel and save money in the end. The gain is in making more of the fuel injected into the engine burn instead of getting blown out of the tailpipe like it normally does. That is why ALL emissions tests with injected hydrogen (even as low as 3-5%) show cleaner air. It is the modern ICE computer driven fuel delivery systems that cancel or negate the gain of mpg's by there O2 sensors throwing off the proper mix when it senses the O that in inherently in HHO. Using a permeable membrane to separate the H and O and dumping the O to atmosphere and using the H does improve mpg if you have an efficient electrolyzer. I have done it on several cars and even diesels.

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