Announcement

Collapse
No announcement yet.

Shop Made Tools

Collapse
This is a sticky topic.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Originally posted by rcaffin View Post
    ...
    On the right we have Version 4, with a (fairly) quiet burner. More complex aerodynamics. I have skipped V-1, V0, V1 and V2.
    ...
    Very nice ... very professional looking. Market worthy. It look like it folds up into a flat-ish form. How much does it weigh? How much fuel does it use & how much does the fuel weigh? What's the minimum diameter pot - it's hard to judge it's size?

    Are the aluminum/aluminium legs CNC'ed from blocks? Why 4 legs - I would expect 3?

    Comment


    • Originally posted by rcaffin View Post
      I yearn for a lighter pack......I want a remote inverted canister stove.....So I bought a good CNC machine
      Cheers
      Roger
      We're probably the only group that understands that thought process. You managed to find the holy grail though and get it to pay for itself , congrats, and nice stoves.

      Comment


      • Originally posted by rcaffin View Post
        .............My manual machining is tolerable, but not good enough imho. So I bought a good CNC machine, good to 0.01 mm easily (ie not Chinese), taught myself how to write g-code.............
        Cheers
        Roger
        That's very impressive!
        Location: Saskatoon, Saskatchewan, Canada

        Comment


        • Folds flat(ish) - yes indeed.
          Total weight is ~85 g.
          Fuel use for canister stoves depends on two things: pot dameter (narrow pots lose flames up the side) and power output. Run any stove hard and it is inefficient. In the mountains I typically use about 30 g of butane/propane mix per day for the TWO of us. That figure comes from many month-long walking trips.
          For winters in the snow, I double that figure, because it takes as much energy to melt a litre of snow as it does to boil it.

          Minimum pot diameter is about 100 mm. That is a rather narrow pot. I prefer larger.
          There are 4 legs instead of three because it is much easier to tilt a pot over with only 3 legs. It's a geometry thing.
          The legs are 0.8 mm 5083 aluminium sheet, folded to a right angle, bolted down and machined to the shapes seen. The Al sheet is soft, but using pulsed misting (kero + olive oil) the cutter stays wet and there is no BUE.

          I am currently machining up another 2 dozen stoves for sale.

          Cheers
          Roger


          Comment


          • Originally posted by rcaffin View Post
            ... Total weight is ~85 g. ...
            Minimum pot diameter is about 100 mm. ...
            For 'Mercuns: weighs 3oz & 6" overall diameter, legs made from 1/32 thick sheet (flashing, basically). It's tiny - I couldn't tell from the photo. Congratulations on meeting your light-weight goal!

            As a former research scientist you must be getting a little bored with manufacturing, no? Be honest.

            Comment


            • Having done a bit of hiking/camping in my early days (but nothing like what it sounds like you do) I can attest to the importance of more legs under the stove and pot rather than less. I know that 3 sounds like a magic number since it can be set onto any surface and automatically not wobbble. But keep in mind that when camping the surface we set the stove on is more often than not soft. So the legs of the stove can be pushed down lightly or shimmed with a handy bit of something so it sits stable.

              5 or even 6 legs would be better from only a tipping stability point of view but I'd say Roger's selection of 4 is a compromise he made based on bulk and weight vs stability in use.
              Chilliwack BC, Canada

              Comment


              • The sheet Al is 5083 alloy: fairly hard for sheet. Not as hard as 7075 of course. Certainly nothing like what is normally sold as flashing. I suspect flashing is probably 1060 Al alloy or similar: that is almost pure 100% Al and very soft. I got the 5083 sheet cheap: the distributor had over-ordered and wanted to get rid of it.

                Yes, I chose 4 legs over 3, but I also supply a square of oiled 1/8" ply to serve as a base board on soft soil and snow. I also supply 4 micro-pegs which can stake the stove down for stability, through holes in the board. Boasting of course, but a big advantage I have over large commercial companies is that I USE the stuff myself. I know what works. That's the difference between wild Go-Fund-Me inventions and what works.

                No, I have not (yet) got bored with manufacturing. To be sure, it is a different world from physics research, but somewhat to my surprise I found it a huge challenge, especially at the start. As a research scientist I had workshop staff, purchasing staff, technical assistants, a budget (which was NOT my own money), ... As a solo mfr, I had to do everything - and it was far more complex than I had expected. (Secret: ebay is my engineering supply shop.) Also, there is certain satisfaction in sitting there watching a CNC machine running, churning out highly accurate replica parts.
                Breakfast


                Ski touring, Australian Alps, breakfast time. The stove is a commercial one, because the photo was taken many years ago. A precursor. The weather overnight had been a little noisy, but it was calm and SUNNY in the morning. Two bowls: my wife and myself. What is not to like?

                Cheers
                Roger

                Comment


                • You're living the life roger, good on ya!

                  Comment

                  Working...
                  X