Sciencescience

Tue Jun 11, 2019, 03:50 AM

question of physics

While thinking of the French Revolution and comparing its similarities with the present situation, in which the productive classes, the working people, the taxpayers, began ousting the nonproductive classes, the overpaid desk-sitting governmental bureaucrats, the social services parasites, beginning with the elections of November 2016, my mind wandered back to the invention of the guillotine circa 1790.

The original design was a rounded blade, which was later refined to an angled blade because it was, in theory, better.

Why would an angled blade be better than a rounded one? What difference would it make?

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Arrow 8 replies Author Time Post
Reply question of physics (Original post)
imwithfred Jun 11 OP
Iron Condor Jun 11 #1
imwithfred Jun 11 #3
SatansSon666 Jun 11 #6
rampartb Jun 11 #2
imwithfred Jun 11 #4
rampartb Jun 11 #5
Iron Condor Jun 11 #7
oflguy Jun 11 #8

Response to imwithfred (Original post)

Tue Jun 11, 2019, 04:16 AM

1. I'll give this a try....


An angled blade has two advantages. 1) By starting the cut from the outside the full weight of the blade's energy is being used for cutting whereas some of the blade's energy on a rounded blade will be lost to the crushing force it will also cause. 2) Unlike a rounded blade which will be cutting in two directions starting from a center point moving outward, thus spreading out the blade's force. An angled blade will only be cutting in one direction starting from one side moving across to the other side. The actual cutting surface of an angled blade will be approx half because its cutting only in one direction instead of two directions. Of course this means the force of the angled blade is more concentrated making it a more efficient cutting tool.

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Response to Iron Condor (Reply #1)

Tue Jun 11, 2019, 06:52 AM

3. Whoa. Thank you!

Very good description, especially one for non-technical people.

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Response to Iron Condor (Reply #1)

Tue Jun 11, 2019, 10:46 AM

6. Sums it up pretty good.

It's all about resistance and application of force.
More of the blade in contact with what is being cut equals more resistance and more energy needed to do the work. This can be solved by increasing the height of the blade when it is at rest thus increasing it's potential energy and thereby increases the kinetic energy the blade has when it makes contact. The easier way is to angle the blade so it meets less resistance and the energy can perform the same amount of work as a rounded or flat blade dropped from a greater height.
The blade doesn't only cut across though, it cuts down and across with an angled blade.

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Response to imwithfred (Original post)

Tue Jun 11, 2019, 05:10 AM

2. iron condor has several valid points

but I will go with ease of mass production and sharpening.

by the time trump, his cabinet, the supreme court, over 5oo congresscritters, thousands of lobbyists, have been herded under the blades like cattle sharpening will be a consideration. I predict a healthy competition between the crew on the Washington mall and the crew on wall st.

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Response to rampartb (Reply #2)

Tue Jun 11, 2019, 06:57 AM

4. You know, I never thought of that, when comparing today's revolution with

the French Revolution; what our contemporary Place de la Concorde would be; the Washington Mall for the deep state and Wall Street for the speculators seem as good places as any.

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Response to imwithfred (Reply #4)

Tue Jun 11, 2019, 07:42 AM

5. that little circle with the statue of the bull seems like a perfect spot

the bull, of course, will be rendered into little pieces, like the bricks from the berlin wall that were so collectable a few years ago. I've always likened that bull to the statue in exodus 32 …….

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Response to imwithfred (Original post)

Tue Jun 11, 2019, 02:44 PM

7. You might enjoy this video

History of edged weapon designs and use.


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Response to imwithfred (Original post)

Tue Jun 11, 2019, 08:58 PM

8. Ever watch a "magician" tear a phone book in half?

The trick is to position the book so that only the a few pages are torn first. As the tear progresses, the book is rotated. That way, the force is not applied to the whole book at any time. An angled blade starts the cut on one side of the neck, thus the blade does not cut into the whole neck in the beginning.

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