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Energy Storage – Capacitors – Equalization of Pressure

A Low Voltage Electrolytic Capacitor

In electrical theory we have so far been dealing with unchanging or very very slowly changing values. Tonight’s post is the start of talking about changing values of current and voltage. We are still talking about Direct Current, but we are starting to change the course of the path

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How Our Craft Stick Beams Resist Bending.

Four 2 X 3 Popsicle Columns

Cross section view of possible craft stick beams.

The problem we have with the craft sticks and bending is bending in the thin direction (axis). The answer I have come up with is stacking the sticks to get a wider beam in that direction as shown in

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Stress, Strain and finding center.

Stress – Strain curve for metal.

This is the first of what will probably be three posts on the theory about the loading of beams and columns. This is why I am building the popsicle crane boom in the way I am doing it.

We have been tied up in details lately, so I

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The Popsicle Crane boom – Test 1.

Picture 1: All of the loads acting on the boom.

Over this long 3 day weekend I finally got the initial test tower completed and did some testing. In many ways it was my testing that failed and not the tower. There is a story often told in math class about the frog dying

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Top Dead Center and Singularity

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The Pedal 30 degs off T.D.C.

There is a mathematics term thrown around a lot by the “free energy” people and after the last post about the do-nothing machine, this is probably the best time to deal with it. The term is singularity or as used by them “the singularity point”. According to Wikipedia

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Buckling of the Popsicle Crane Boom

A beam buckling

We have put quite a bit of effort in understanding the forces on the crane boom. Now we need to start figuring out what we are going to do about them. (Refer to the post crane-boom-analysis-part-2) The fact that the whole boom is under compression loading explains a lot to me

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Episode 058 – Thinking through design problems of the Hammock Boat.

In Episode 53 we talked about a Hammock boat. In some other episodes we talked about the buoyancy of PVC pipe to create the pontoons. In this episode we discuss the other problems we may have with this boat and things to be aware of.

First, the announcements: I checked the e-mail subscription thing –

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Episode 57 – Center of Gravity

The Definitions of Mass, Gravity, and Weight. These terms are loosely used so we need to define them to eliminate confusion.

Mass on earth is equivalent to weight because the Earth has a uniform constant gravitational force. In other words the amount of force the earth pulls on something is proportional to the mass of

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Post 53A – Calculating Buoyancy of a piece of PVC Pipe.

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UPDATE: I have added several new posts with a better way of creating a raft. PVC Pipe would be an expensive way of getting the job done, Plastic Barrels would be much much cheaper.

Please check out the following four posts. A Plastic Barrel Pontoon Raft Part 1

A Plastic Barrel Pontoon Raft Part 2

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Episode 53 – A new design project.

A friend on facebook came up with this picture and said he would like one of these. It turns out this is a good chance to talk about designing something.

In the audio I talk about the steps necessary to try to copy/modify this hammock-boat. I doubt that I would ever build one of these,

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