How to make a Dakota fire hole - photo

[Altair]

How to make a Dakota fire hole.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg



Previously:

World's largest bonfire - video and photos
Chinese festival bonfire - GIF
Lighting a bonfire with a hot air balloon burner - GIF
How matchsticks are made - GIF
Stormproof survival matches - GIF

[Toolmaker51]

Rocket Stove without the shearing, plasma or bandsaw cutting steel and welding, nor the portable aspect.

[schuylergrace]

Rocket Stove without the shearing, plasma or bandsaw cutting steel and welding, nor the portable aspect.

Almost, but you've got no secondary air source, post combustion.

[neilbourjaily]

Rocket Stove without the shearing, plasma or bandsaw cutting steel and welding, nor the portable aspect.

This appears to be a survivalist image.
Beyond that, however, it has to do with accessibility. Consider the most accessible form of energy, other than solar, is steam. All one needs is a fire and a container. Make it more sophisticated, and the steam can be contained and used to drive a piston, an arm, a shaft, etc. This 'Dakota Fire Hole' is an accessible rocket stove, and the design predates.

[Floradawg]

Good idea. Diagram not to scale.