Female Genatilia Tattoing

why the saying" do not break, not bend, cut and well "?

determining the destructive power and sharpness

separated by a cutting the bone but also meat cuts

A cutting tool with a sharp-angled edge is sharp, an obtuse angle of the blade is more stable. Thus, under the balance between sharpness and quality staff to the intended use of a cutting tool. The angle of the blade of a sharp katana measures about 30 °, the (丁 柳叶 包) of a so-called "Yanagiba Hocho kitchen knife" to 20 °, and a nata-Haumesser (铊) about 35 °. The Yanagiba Hocho has cut through the field to meat, and a nata stability to - as the name suggests - wood to cut into pieces. Say you can split with a Yanagiba Hocho no fire wood and a nata not prepare sashimi.
This was supported by the warriors to arms tachi used to hit with a helmet or armor. There were also shock as in the modern kenpo techniques or techniques to make the arteries, but the main goal was likely to cut through bone. If one now considers this purpose in mind, had to - if we use the previous example of yanagi-Hocho and nata - a serviceable sword to be designed more like the latter, in order for the cut or-break to have enough staff technicality. Now, such a cut is not effective for the soft, fatty tissue containing the abdominal area. Here would be a cutting edge in terms of a Yanagiba Hocho appropriate.


The strength and sharpness improving sori

to describe the characteristics of a Japanese sword is often "do not break, not bend, cut and well" the spell (orezu, magarazu, yoku-kireru, 折れず, 曲がらず, よく 斬 れる used). The stability - that is "not break" and "Do not bend" - with focus, "do well" means to agree with each other, ensures the curvature of the blade (sori, 反り). Rod-shaped objects are longitudinally stable, but vulnerable to lateral loads. Chopsticks, for example, you can easily break in the middle when they bend, but it is almost impossible to crush by hand in the longitudinal direction by pulling or tearing. It's the same with the katana: It is stable at impact, but more sensitive to lateral forces such as cutting. Due to the curvature of a tachi or uchigatana it retains the same cutting force as a straight chokutô, but it reduces the impact force as the cutting angle on the target occurs (see Figure 1). But this is not the only effect of the sori, for he is just as important for the cut. With the same cutting motion - curved sword against a straight chokutô - namely, it increases the "sharpness", ie the average effect (see Figure 2).

1: The incidence of a straight chokutô and a katana with sori :

top figure: results when vertical impact of the cutting edge of a chokutô with
the force A, which also vertically opposing reaction force B .

image below: The curved blade makes an angle onto the target, and so
the recoil force B - spread - with the same output power A. B = b1 + b2.
the blade perpendicular to the recoil force acting b1 is therefore smaller than when the same force
A with a straight blade would chokutô (B).

2: The angle of the blade and the cutting angle:

white triangle: angle of the cutting
yellow triangle: the actual, sharper cutting angle
red arrow: cutting direction

Here we see that the actual cutting angle of the oblique impact with the target
smaller than the angle of the blade, ie the "sharpness" increases.

with a circular movement "drawing cut"

What is the situation now in the actual sword fight. In Figure 3, with the sword from the Jodan position knocked vertical (kiri-oroshi, 斬り 下ろし), and that it will target the peak of the opponent. Depending on the technology of course there are different version, but this can almost be described as the "base-sectional shape. From the moment when the blade hits the top of the opponent to the end point of the blow, the blade takes an imaginary circle with center movement in the left shoulder. In addition, angled from the impact with the ideal impact point three sun (~ 9 cm) behind the sword tip to the final stop of coarseness of the elbow, that is, the handle is pulled to the body. Thus decreases the imaginary circular motion.
This is often called "pull the sword during the cutting or solid-section" means. But this "drawing cut" should ideally not consciously, but automatically run. In the above-mentioned circular motion puts the tip back a longer distance. It is said also "runs the tip" (ga kissaki hashiru, 切先 が 走る). Finally
So one can say that the katana but rather an angle of cutting tasks have a nata, but it achieved through the sori and the "Running the top", the effective sharpness of a Yanagiba Hocho.

3: The circular path at the vertical cut (kiri-oroshi, 斬り 下ろし:
The blow is spent on the drawing force a2 law. outside and outline the overhead
position of coarseness. The arrow shows the position when striking the target, ie it is
Stomp (Fumikomi-ashi, 踏み込み 足) concentrate with lowering of the body
run.
Note the left hand: takes effect from hitting a circular motion
centered in the left shoulder, and angulation of the elbow during
of coarseness is the radius of this circular motion reduced. This entire process
called "drawing cut" or "solid-section".

My special thanks go to Markus SESKO that this text has been translated from Japanese as always very professional and knowledgeable. Mark is a member of Nihonto - Club and author vieler interessanter Bücher zum Thema der japanischen Klingen. Siehe: Neues Buch zum Thema "japanisches Schwert"





Quelle:
Illustrated laminated Japanese weapons - the definitive (group picture series history) [Paperback]
Amazon.jp
.