When I visited Kelly Coyne and Erik Knutzen of Homegrown Evolution last week they showed me the rocket stove they made in their backyard. Theirs is quite fancy because it is made of bricks. They sometimes use their rocket stove to fry a meal in a skillet.
The rocket stove was invented about 10 years ago by Dr. Larry Winiarski at the Aprovecho Research Center in Oregon. It consists of an elbow-shaped combustion chamber (usually made from metal cans) surrounded by insulating material (often a large can filled with sand). It uses twigs for fuel, so it's ideal for areas where the trees have been depleted.
Here's a video from the Aprovecho Research Center that shows how to make a rocket stove.
Here are the first 3 of 10 rocket stove principles, by Larry Winiarski.
1.) Insulate, particularly the combustion chamber, with low mass, heatresistant materials in order to keep the fire as hot as possible and not toheat the higher mass of the stove body.
2.) Within the stove body, above the combustion chamber, use an insulated,upright chimney of a height that is about two or three times the diameterbefore extracting heat to any surface (griddle, pots, etc.).
3.) Heat only the fuel that is burning (and not too much). Burn the tips ofsticks as they enter the combustion chamber, for example. The object is NOTto produce more gasses or charcoal than can be cleanly burned at the powerlevel desired.
Illustration from In the Wake
, a cool website on various simple off-the-grid tools.
This nifty tutorial from JustOrigami shows how to make a dollar origami guitar, a fun way to present a cash gift to someone, especially if they enjoy or play music.
On Historic Hunter, Shawn Woods repurposes materials he finds in a local dump into arrowheads using antlers and simple metal objects. The ancient technique, called flintknapping, will be handy to know after the zombie apocalypse.
Maker Evan Booth transformed a Keurig K350 coffeemaker into a “bionic” hand. As William Gibson once wrote, “the street finds its own uses for things.”
If you’re looking to earn a top salary in the tech industry, there’s no better career than coding. However, sometimes the hardest part of entering this career path is knowing where to begin.We took the Complete Web Developer Course because it took that decision out of our hands. This course teaches beginner-friendly coding languages that will also help land an immediate […]
To be a Pokémon master, you’ll need a phone that won’t constantly die on you. Because nothing is worse than seeing the screen go black right as you’ve finally found the Charizard of your dreams.That’s why we’re so excited about the LinearFlux PokeCharger Portable Battery ($39.99). With its 3.0 Amp HyperCharging technology, this slim battery will […]
The tech industry is constantly innovating, and in order to stay competitive, you’ll need to keep up. The Programming Into the Future Bundle was created to teach you the skills employers are looking for at this very moment, including in-demand coding languages like Google Go.The bundle of courses includes instruction on a range of innovative tools that advanced coders […]