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In step 8, your photo shows a container of baking powder, but your explanation says baking soda. Do there two items work interchangeably? Is one better than the other?
You can do the same with a Dremel sander disc.
Welcome to the Science of Baking
Science of Baking
The concept of rockets is nifty I am in the process of cutting two aluminium 5 pound fire extinguishes down, each to a 45 deg angle.. My only problem will be finding someone weld them together. They will be lighter than steel and great to transfer heat to the outsides where I plan to wrap .25" copper tubing around the vertical shaft to heat water. The concept idea is to build a copper basin that the base of the stove would sit in. As the water in the tube heats, it will rise drawing the cooler water in from the tank & out the top to circulate. I invision a tap could be put in the line supply hot water.