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This will help me to plan the work and divide it into manageable chunks phases. I will keep this live and update with any additional information that I dig out. I guess doing the work will clarify a lot of assumptions.
There are historical variants of bows that are no longer used, and there are school-to-school variants used today. There used to be in ancient times bows made from single piece of bamboo or wood. Then core bows were introduced, and the composition of the bow was evolving.
Starting with face-core-face structure, the core was divided into strips. This depends on the use. Ceremonial bows are decorated extensively, samurai battle bows are protected from moisture and damage, school training bows are on the cheap side, and collectors bows are a mix of the above. Different lacquer is used, also rattan wrappings, leather and thread wrappings are applied. Modern bows are made from glass fiber, or carbon.
Apparently these bows take abuse very well, compared to delicate bamboo bows. Also they are more stiff in action, as the bamboo draw and release are smoother. No fiber glass, carbon, foam, epoxy, synthetic glue etc. These bows are shooting differently and better than synthetic bows, according to people shooting both, and this study here: Effects of Kyoto bow structure on the Motion of Archer.
As I intend to make bows for myself, I need to make a yonsun nobi, with draw strength between kg. Apparently ancient battle bows have had even greater draw weights. Here is where the information is skimp.
There are no dimensions stated anywhere. Also bows made in different regions of Japan and by different masters tend to have different thickness. Thickness depends on the core construction, and the type of bamboo used.
Stronger bows are also made thicker, as the resistance comes from the amount of material in the core. I think in Kyoto area the bamboo grows thinner so the bows are also thinner. No data. Thickness is not constant along the length of the bow. Also it seems that instead of the core thickness varying, it is the glass fibre front and back face thickness changing. This is more difficult topic — how to describe the curves?
In unstrung form the bow has interchanging curves and flats areas. From the bottom end:. When the bow is stringed these create the final shape with curves becoming flats and flats becoming curves, to certain extent :. There is also a very important bend in different axis, musicas gospel da universal middle image above shows it well: the bow is bent to the right so that the string at the nock point is a little bit outside of the grip from the right sidein order to push the arrow parallel to the bow, and not into the bow.Rise of Empire Your Favorite General.
Kevinmeath Ad Honoris. May 15, Navan, Ireland. Not familiar enough to comment on Japanese weapons and a vote for the 'Welsh' Longbow would be on national bias only. Suspect the Archer would be very important. Cedar Brown. Oct Ontario, Canada. I'll second that it depends more on the archer. As far as I know, power is mostly about draw weight. And the draw weight only matters if the archer has the strength to draw it. The Japanese bow is superior on horseback though. There is at least one account of the longbow being used on horseback but I suspect that the success of the endeavor on that occasion was due to the shock of the attack rather then deadly aim.
Mar 5, Bedfordshire,England. English Longbow Dec 6, The Netherlands. Naomasa Forum Staff. Apr 39, T'Republic of Yorkshire. I'm not a weapons buff, so I don't know enough about the technical aspects of each weapon to comment on it, but it would seem to me that the effectiveness of a bow in the overall context of a battle comes down to numbers. The vast majority of Henry V's men were archers at Agincourt. The samurai began life as mounted horse archers, thus making the weapon relatively restricted in use to those who could afford the horses and training.
I cannot vouch for the effectiveness of ashigaru archers. I'd give this one to the longbow if it was on a battlefield. In a direct, one on one comparison, I wouldn't know. Dec 1, Newfoundland. Nothing can match its range and power. May 1, Europe.The Yumi is a tall, asymmetrical bow with the grip about one third the distance from the lower tip with the upper and lower curves differing in shape.
The bow is traditionally made from laminated bamboo, wood, and leather. The Yumi is always supposed to be taller than the man who wields it. The Yumi has existed in Japan since pre-history. The length of the bow gives it great firing power, though the position of the grip may have allowed it to be fired from horseback or a kneeling position. The effective range of a Yumi longbow is about 30 meters against an armored Samurai, and meters against an enemy army.
The bow could fire a Ya arrow as far as meters; but was unlikely to hit anything at this distance. Smaller bows would be effective at shorter ranges. Samurai Armor is relatively lighter than European Plate Armor most commonly associated with Knights because the Samurai considered the use of the Yumi to be more important than having heavier armor.
The Kabura-ya was a unique type of arrow used by the Japanese, known as 'whistling-bulb arrows'; which created a whistling sound due to a specially carved or perforated bulb of deer horn or wood attached to the tip.
These arrows were intended to create chaos with the loud intimidating noise.
However this tactic was not effective against elite armies like the Mongols, who infamously laughed at these arrows in the Mongol Invasion of Japan. In the show the Yumi was shot at two dummies from 45 feet accurately hitting them. The Samurai experts also claimed that the Samurai specialized in accurately shooting out the enemy's eyes in order to kill the targets regardless of their armor.
This feat was demonstrated by shooting out dummy eyes at 25 feet. However in the show Tetsuro Shigematsu shot the yumi with the arrow on the left side of the bow when it's always drawn from the side of the thumb on the right and pulled further behind one's ear in a pencil grip.
Shigematsu did not pull the string from behind his ear or placed the arrow on the right side. He instead did a 3 finger draw used in western style archery drawn from the side of his face and placed the arrow on the left side of the bow. This wiki. This wiki All wikis. Sign In Don't have an account? Start a Wiki. Categories :. Cancel Save. Universal Conquest Wiki.These synthetic bows are more durable and far more forgiving of improper technique. It is possible that persons with shoulder or elbow injuries may aggravate the injury by using Fiberglass or Carbon Fiber bows which produce a greater amount of shock at the release.
In this case the individual will need to weigh the advantages and disadvantages of the use of a natural or synthetic bow. It is typical in Japan to wait until 3 rd or 4 th dan is obtained before acquiring a Bamboo Bow; and then only if a qualified instructor is present to assist the student with the care and use of the bow. Do not purchase a Bamboo bow if you do not meet these requirements.
Also, as a first choice Bamboo bow a non-Higo yumi constructed without cross lamination may be preferable.
They are less expensive and sturdier than Higo Yumi. Bamboo bows are made with either a synthetic bonding agent or with Nibe, a natural bonding agent. Nibe is made by boiling fish air bladder and deer skin for long periods of time. The use of this special glue creates a bow with a smoother draw and release than is possible with a bow constructed with a synthetic bonding agent. However, these high quality Nibe Yumi are constructed during the fall and winter months. And, therefore, one must avoid using a Nibe Yumi in hot, humid conditions because they are susceptible to warping and damage in these circumstances.
They are also susceptible to extremely cold or dry weather. When purchasing any Bamboo Bow you must remember that it is unwise to rely on the continual use of a single bow.
At least two bows are necessary to allow periods of rest to avoid damage to a Bamboo Bow. Choosing the correct bow length It is extremely important to choose the correct length of bow. Experience can also be a factor. Choosing the correct pull strength The correct pull strength is determined by two factors: experience and physical makeup. Ideally, an instructor will start you with a relatively low pull strength 8 to 12 kilograms and move you up in strength until you are ready to purchase your own bow.
If you are unable to do this then a decision will have to be made concerning the proper pull strength for you. As a guide, experienced female archers generally use bows with a 12 to 17 kilogram pull strength while experienced male archers tend to use bows in the 15 to 20 kilogram range.
Thegn Ansgar Ad Honorem. Dec 5, Canada. The English War Bow was the first super weapon, used by commoners to kill the ruling class, the nobles. While the Japanese weapon was used by so called warriors who could not even win any battles outside their own country.
Naomasa Forum Staff. Apr 39, T'Republic of Yorkshire. Oct 1. Incredibly strong bows. That's definately equivalent to the longbow.
With the longer Ya arrowsit seems that the Yumi would pack more punch. Does the shape of the Yumi affect its distance capabilities? Jun 29, land of Califia. Thanks for the answer, and welcome to Historum.
Apr Pancho35 said:. Nothing can match its range and power. Apr 16, Slovakia. Cedar Brown said:.
Yumi making: Overview
I'll second that it depends more on the archer. As far as I know, power is mostly about draw weight. And the draw weight only matters if the archer has the strength to draw it.
Tairusiano Ad Honorem. Jun 3, Brazil. The Japanese bow is superior on horseback though. There is at least one account of the longbow being used on horseback but I suspect that the success of the endeavor on that occasion was due to the shock of the attack rather then deadly aim.
Yumi Japanese Traditional Bow
To be fair, bow -its construction does matter of course. But not in a way people usually refer to. Under certain conditions, short bow is required: when firing from horseback. In wet climate, composite bows are on disadvantage as moisture disrupts their glue. And so on. Iolo Ad Honorem.
May 2, Rhondda.I also read that Japanese arrowheads are made in a similar manner to their sword, i. Even if we assume that's a low quality iron helmet, piercing it on both sides is still an impressive feat.
Thank you for the visit! I'm honored that you read it! As you can see all my blog is still work in progress both in content and design ; I will correct the "roof to floor" sentence since I've just misunderstand what a rafter is. Yes you are right regarding the steel in arrows, the process is called differential hardening; but it wasn't used in decorative arrows because the steel needed to be softer to be easily decorated.
Virtually all steel in Japan at that time was of folded construction. The very poor quality bloomery steel that was available to them basically necessitated a folding process to draw out impurities and create a somewhat homogeneous internal structure. Infact their steel tended to be of such quality that it often wouldn't have met out modern definition of what steel is, a great deal of it had carbon contents which made it into the material we call "cast iron" today this is because of its chemical makeup, not because it was actually cast into shape.
There are many points to address in your comment. First of all, pretty much everywhere prior to the development of the Bessemer method, steel produced with pre-industrial technology needed some kind of refinement a. Bloomery steel, decarburized cast iron, wootz; all of them need some consolidation in order to homegenize the final product. Also, bloomery steel quality was pretty much the same all over the world, because the process used was very, very similar; the biggest difference would have been in the size of the furnace.
Japanese bloomeries were able to do so, and there is not something inherenthly inferior in their methods compared to European or Middle Eastern ones as far as bloomery steel production is concerned. You can expect a very similar final bloomery steel in Europe and Japan for example. However, what is important, is the fact that the Japanese had access to an indirect steel production method known as Zuku Oshi Tatara which is essentially a blast furnace.
With this process, the final quality of the steel ingots would have been much better compared to bloomery ones. You can expect to see steel with very low amount of slag in Japan too. Forging cast iron into shape is something that is not even feasible in my opinion, because it's too brittle. Japanese swords used either hypereutoctid bloomery steel or decarburized cast iron with a carbon content range in between 0.Rise of Empire Your Favorite General.
Jun 29, land of Califia. Toltec said:. The main difference is draw weight. Japanese bows had a pull of around 30lb. Thegn Ansgar Ad Honorem. Dec 5, Canada. The draw strength is not overly important for arrows, when they are meant to be fired from a relatively close distance. A yumi with a 30 lb draw weight is capable at penetrating armour from a very close range. However, given the nature of yoroi samurai armourthey are relatively protective against piercing and slashing. Most war yumi that I have found have a draw weight of about lbs.
Many modern bows are not designed for war, so it's hard to base it on that. I believe this particular style is known as Satsuma Heiki-Ryu i. But it's decent enough. Last edited: Jun 30, Thegn Ansgar said:. However, given the nature of Most war yumi that I have found have a draw weight of about lbs.
Sep 1, The Yumi also wasn't as widely particed as the English longbows in purportion to the population. Also, it's questionable as to how much armour the French horses really had in the hundred years war, the manuscripts from the similar era almost always depict them as having no armour as well.