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I Forge Iron

Jack Evers

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Posts posted by Jack Evers

  1. As stated_physics and equations won't solve this, but the concentration has been on energy. Momentum  (mass times velocity) is also conserved. Energy comes in several forms with deformational energy being a major one. For example, safety in cars,. In my youth, many decades ago, cars were built like tanks and in a collision the deformation was apt to be in deforming the occupants. Todays cars (race cars being an extreme example) are pretty flimsey, but in a collision the energy goes to deforming the car (parts fly everywhere) not the occupants and folks survive some pretty spectacular crashes. - The car damage can be fixed by throwing money at it - better than people damage. Most of you already know this, but if you want a shallow upset use a light high speed hammer, for a deep upset use a slow heavy hammer, or as Charles says trying to move a wall with a light fast hammer rrsults in deformation of the framing lumber. A sledge moves the wall.

  2. Years ago I asked a stable owner where I kept horses if I could put in  a treadmill - two hp motor. I said I'd pay extra for elecricity if he wanted. He said what will it use? I said about 20 cents an hour - probably use it a couple hours a week. He said don't worry about it. His next electric bill was a hundred or so higher than normal and he was on the warpath. Turned out the meter reader had just misread the meter. I think I've seen estimates that for a commercial shop, the power is one or two percent of a project cost.

  3. I did not make this knife and I know nothing about it. If it was heat treated or not. Some tenants left it in my rental house. I do however like the work and the shape. It is an HC spike, which I understand has less than 1/2 the carbon we might like. It is quite soft, a couple strokes with a rusty file put a pretty good edge on it, I refined it with a stone, took it to a barbeque where I cut the meat off a small well cooked chicken and it was dull - visible edge. I'm thinking of just an aggressive quench, like brine or even super quench. Would that make it a somewhat reasonable light duty knife ?
    post-5186-0-11273700-1385936148_thumb.jp

  4. I have a half dozen bottles around, Couple forges, BBQ, weed burner, camper, etc. I'm a codger so most of my stuff has the old style brass bottle connection that screws inside the valve housing on the bottle with a left hand thread and requires a wrench for a tight connection. .My camper has the newer plastic connection that goes over the bottle neck with a right hand thread and is designed for hand tight.. I have one bottle (I've marked it so I know which one it is) that will not give me pressure on my camper. It will pass enough gas (that sounds bad doesn't it) to sort of operate the gas range, but not enough to operate the water heater or furnace. It works fine on high draw items like my forges or weed burner that have the old style connection. If you have the newer style, you might want to consider a bottle exchange rather than a refill and see if its a valve problem.

  5. Frosty is on the money. There is so much energy to be obtained from a unit of fuel with a proper air mix. That energy heats the combustion products to a given temp and it makes no difference how the mixing is accomplished..

  6. On a more serious type note about the modern sensory deprivation. A few years ago we had a wonderful young lady ( 19 YO) call us (contact by a mutual friend) and ask if she could come spend a month or so on the ranch to learn about the West. Would work for her room and board, didn't expect pay. She came from a quite wealthy family in the East, had traveled the world, etc.The simple things that I take for granted amazed her. A camping trip into the mountains where the milky way was an amazement - London, Paris, Istanbul, etc had light pollution. She'd never seen the Milky Way in spite of all her travel.. Asked what she enjoyed most, it was installing wainscoting in a guest house we were building. She'd never built anything useful before. She wanted to shoot a gun. I took her out, gave her a Model 76, Springfield trap door 45-70. She asked if it really dated back to 1876. I said well, the 1876-1890 period, but it was well over 100 years old. She was thrilled "My brothers will be so jealous!!". Wish more kids would reach out like this to learn.

  7. Doing a demo of shoeing for an elementary school including hand made shoes. As I was nailing one on one youngster said "doesn't that hurt them/" before I could answer his friend said "No, see they come back out". If you run something in your hand perhaps you should just push it clear through and it won't hurt !!!. Our elementary schools here do have a traditional crafts day with things like blacksmithing, weaving, dressmakeing, willow basket making, broom making, etc.

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