Hybrid Burners?

[Ardor]

At the moment I'm planning on using an A16 A shaped crucible.

Height - 9 5/16
Top Diameter - 7 1/8
Bottom Diameter - 5 1/2
Pounds of Brass - 35.2

However I've designed it big enough to handle a larger crucible should I ever decide go bigger.

It'll take up to an A30:

Height - 11 1/2
Top Diameter - 8 5/8
Bottom Diameter - 6 1/2
Pounds of Brass - 66

However I would need help to handle a crucible that large. I wouldn't try to lift and pour something that big on my own... Heck, I don't even plan on using a full A16 crucible on my first few castings. Small, carefully thought out, steps :-)

I'm VERY mindful of just how dangerous what I want to do can be.

I'm planning on doing ceramic shell casting. I actually have experience with investment casting, on a smaller basis. I also cast jewelry but that equipment couldn't handle even a small sized sculpture... Although I did used the electric burn out kiln form my jewelry equipment to fuze my first few test ceramic shells. They just barely fit :-)

At the moment I plan to make my lifting and pouring tools myself. We'll see if that changes. If my welds can't take the pressure they're going to have to deal with I'd rather buy tools, or have someone else make them, rather then deal with broken crucibles and molten metal splashing all over the place!

[cougar]

Gas Burners for Forges, Furnaces, & Kilns

This book has a very nice lay out on Burner builds if you like over kill.
It looks much like the burner you presented that NASA uses ... machined pipes etc.

Very cool looking burner even if overkill for some. He clams to get, if I remember 27 to 1 oxygen to fuel mix. It would be nice to run a comparison test with this and the more straight forward ones.

Ive spent several years looking at method's and I think Ill go with the foam beads and cement. Save the blanket for the wax melting.

I think you should build the furnace around the crucible and if you need a smaller poor just use Les metal rather than have to much space around the crucible.