Category: Fuigo-Box Bellows

Breathing Fire Part 3-Building Fuigo 2.0

Lets Get To It

Now it is time to get down to the nitty gritty and build the air box. This box does not alter the basic design but some of the details are changed. We figured out from the box tests that the double flap valve arrangement was best.

I also modified how the flaps are constructed and how they are attached. Again everything is geared towards cutting down on resistance to the air flow.
I came up with a dandy system to make the inside of the box slicker than owl stuff and combed through a very large Tandy leather store in Fort Worth for the perfect covering for the piston. It made it air tight and slick as well.

The handle shaft floats in its housing. The actual operation is smooth, slick and unrestricted. With the top off off the small secondary chamber and so that the air vents freely it works like a breeze. The flaps open up a full 90 degrees and there is almost no resistance to the push and pull.

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Breathing Fire-Part Two

Mad Scientist

I have to admit to feeling some affinity to the crazed scientist depicted in movies. Or maybe Rube Goldberg would be a more accurate  comparison. I have to continually fight the urge to over-engineer stuff.
At left is my $32 anemometer measuring  wind velocity of 54 feet per second or around 37 miles an hour. Not exactly a hurricane but a mighty stiff breeze. One that would certainly fan the flames.

Oh No! Math

We are going to take a minute to explain the math that is the quantifier for these experiments. When I was in school I saw no point to mathematics-my mistake. Maybe some blame can be assigned to the way it was/is taught, but still my mistake. The truth is that mathematics is a beautiful, concise language that allows us to understand and describe things in a quantifiable way.

“How hard is that blowing there Dan?”
“Um, not sure. Harder than before-I think”

“How much air are you getting out of that pipe every minute?”
“No idea”

But the mathematics is useless without well designed experiments and a way to accurately measure the results. Hence my cobbled together wind box and the nifty little anemometer. ( I love that little yellow instrument. It is the perfect tool at a very reasonable price).

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Breathing Fire

Lets take a minute and talk about aspiration. No, not our desire to be great swordsmiths but rather the process of forcing air into the fire.
Fire needs oxygen to burn. Take away oxygen and the fire dies. Feed it oxygen and it lives. The more oxygen it gets the more it lives.
Give it enough oxygen and it can become a raging, living monster.

A standard car engine is naturally aspirated. A top fuel dragster is turbocharged. Air is forced into the system under pressure. In order to reach forging and welding heats we need to turbocharge our fire.

Methods of Aspiration

There are many ways to to this. An electric blower will certainly work. Plus, there are all sorts of manually operated designs. After all working metals with fire predates electricity by several millennium. As you might expect, we are shooting for a traditional approach.

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