Informationwise, I've found two designs:
- A Kerosene Fired 180 egg cabinet incubator. Done by a gentleman in Haiti. (.pdf file)
- The Peace Corps Poultry Training Manual from 1981. (scroll to the end)
I like the simplicity of the Peace Corps design but their lack of dimensions and instruction makes it a little difficult. You have to do a little guesstimating. I prefer the thermostat wafer set up in the cabinet incubator. Whatever the case, I have a very good start on my detailed design. Lots of notes and a possible design on a manual egg turner ran on the horizontal plane similar to what you'd find in a HovaBator or such.
With just an egg tray, where I'd have to hand turn the eggs individually, it would fit around 100 chicken eggs, 80-100 duck eggs (depends on breed) or 40-50 goose eggs. Then, of course, a bazillion quail eggs... I've added a hatching cage to the design as well. This was a must after my first incubator design flaw (that's another story) of NOT having one.
It's my desire to keep y'all posted in its progress but you know how that can go...