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.
Brock and Bowdy were doing what toddlers do: being stupid. In the process of trying to climb their dresser via the drawers, they tipped it over, pinning Brock. Luckily Bowdy was able to free his twin brother, but these incidents are common. Ikea recently recalled several dressers for the same problem that led to fatalities. […]
The Koldunov Brothers put together this simple demonstration of how using a standard white party balloon can give your flash photography a nice diffused look.
Here’s an inexpensive little project that’s pretty easy and looks cool: LED-filled glass lights with concrete bases. Glen at DIY Creators takes you through the process.
You know as well as I that writing complex, long-long form text requires significant organization. You’re probably also well aware that Word just isn’t up to the task. That’s why I’m a huge fan of Scrivener, the software suite used by best-selling authors and technical writers alike.Scrivener is much more than another digital typewriter. With a […]
Looking to upgrade your weekend? Here are three randomly awesome products on my mind this week.#3 FRESHeBUDS Pro Magnetic Bluetooth EarbudsAs more and more phones and gadgets switch to Bluetooth-only compatibility, you’ll need to get Bluetooth headphones like the rest of us. I’ve been super impressed with these affordable magnetic headphones. Pull the magnetic earbuds apart to auto-connect […]
Traditional folding wallets are designed for paper bills—but these days, carrying cash is rarely a necessity. More often than not, I don’t carry cash at all. This Bogui Clik Wallet is the best answer I’ve found for avoiding the hassle of those tight-fitting credit card pockets.This attractive, minimalist wallet features a protective lip, so my cards don’t […]