Andrew Golabek

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About Andrew Golabek

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    Advanced Member

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    Mountain biking, Chemistry

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  1. Forced air burner tube getting red hot

    I dont think the steel wool is helping
  2. Bronze knife casting

    Very interesting, beryllium is however very toxic, I wouldn't want to make one.
  3. Bronze knife casting

    Here it is, complete with the handle finished, peened 3/16 brass pins, I'm quite happy with it as my first knife of any sort, couple of things to improve for next time though. The edge should probably be further work hardened, I'm going to try 12% tin bronze to see how much harder it is, and maybe aluminium bronze eventually. The handle finishing and flattening the tang to fit the scales was the longest part of this project for sure without any grinder except an angle grinder which isn't ideal ( was flattened by hand). The edge is actually quite sharp, although sharpening by hand seems more difficult than steel- quick and easy to dull it accidentally, so far just been able to get it sharp enough to barely shave arm hair on a waterstone. Will try lansky to see if it's my technique
  4. Bronze knife casting

    I got the copper from a nearby company which had pure copper scrap, and the tin from 97%tin solder 3% copper. The edge is work hardened, i made a little jug which you can hammer and slide the edge back and forth to get perfect hits. Im now finishing the handle (zapote) and planning the next one, with a very different blade shape. This one is a bit thick, weighs 318g for a 9.75inch knife. I wasnt sure how strong it would be and left some margin of error for casting.
  5. Bronze knife casting

    Starting from a wooden carving , to sand casting in bronze. 90% copper 10% tin
  6. Liquid fuel burner

    Added the mounting, and made a lid for now, as well as a choke, turns out it was running very lean, i was able to close the choke alot as shown in the pictures. The forge easily reaches temperature for casting bronze/copper
  7. Burner flames

    Yes mikey, that is exactly where i got the idea from, was just a bit finicky to setup. I dont know what the temperature is, but it seems to be hot enough for any of my purposes so Im happy.
  8. Burner flames

    Yep the wool has just been rigidized, that is the next step! Yeah, probably will get a regular burner designed eventually. I do not recommend "my" type of burner, very difficult to get working well, and more dangerous, it is just a cheap temporary solution, and I'm having fun experimenting.
  9. Burner flames

    Not running on oil, havent tried oil, it is gasoline, thank you though!
  10. Burner flames

    Both pictures as the forge is warming up, got to take one next time I use it. There is no "dragons breath", even with the burner port sealed around the burner. Why does the flame seem to disappear once its heated up? How can i seal the burner port arpund the burner effectively?
  11. Liquid fuel burner

    Now just gotta make permanent mounting screws for the burner
  12. Liquid fuel burner

    Well i got the forge together mostly (or rather foundry, since that is what i will mostly be using it for). Still needs the firebrick floor to be installed, and to be coated with zircon. This was just the first firing for the rigidizer. Stuck an old rusty file into there to see how it heated it up. Works great.
  13. Liquid fuel burner

    Got everything needed to out the forge together finally. 10.5 diameter by 13 inch tall steel can Burner, mounts Ceramic blanket, and rigidizer (going to have 2 inches) 1 inch hard Firebrick as floor removable protection. Zircon, and bentonite for coating ceramic blanket for ir reflection
  14. Liquid fuel burner

    Should have a container to start making the forge to go along with this burner by the end of this week!
  15. Liquid fuel burner

    This design allows only a small volume of fuel to be heated at once, just the volume of the 1-8th inch copper tube which is used to vaporize the fuel. It also doesn't require any air source (the fuel doesn't need to be atomized, it's vaporized instead). The fuel simply needs to be pressurized like in a Coleman stove, or with a fuel pump, this can be kept away from the burner/forge. Currently the fuel is pressurized to 40 to 60psi and the rate is controlled with a needle valve. I think it might work down to 15psi, but I haven't tried since it was redesigned. In the past running the fuel at lower pressure made it huff and go out easily because it would cause vapour lock. The check valve prevents this becoming a problem, but I haven't tested at lower pressures yet. The new nozzle and other small changes fixed almost every problem it had, the flame is now very stable. The next changes to include will be a small fuel filter, and trying the new design in a forge once my forge is built. Also polishing the nozzle in hopes it will become coloured from oxidation. Eventually a choke will be added for more control.