Japanese Yumi Draw Weight

Medieval military longbow draw weight would be 100 pounds or more.

Japanese yumi draw weight. However given the nature of yoroi samurai armour they are relatively protective against piercing and slashing. Various later recurves composites or laminated bows could vary anywhere from 50 130 pounds though most were in the 80 100 pound range. The yumi is a long draw bow and delivers more energy than you might expect from the draw weight. Afaik there s no standard draw length at which these draw weights are measured.

The heaviest draw weight yumi you would get at a kyudo club would be 22 or 20 kilo draw weight 44 pounds. Serving as an introduction to the physics of historic military technology we ll look at a paper by timo a. Your draw weight is 55 29 then you want a 50 55 28. The manchu bow sometimes known as the mongol bow and the japanese yumi both hankyu short bow and daikyu long bow and looks at how these various designs worked to.

They got confused with kyuudo bows which draw weight is in between 25 66 lbs 11 30 kg circa which is extremely low compared with war bows like the english one up to 180 lbs. Now many people stated that the yumi was a weak bow weaker than the longbow for example mainly for these reasons. And if data is available what would be the point blank kinetic energy of the arrows. All our draw weights are at 28 use the chart below to pick the right draw weight for you.

Short bows in europe were frequently 30 50 pounds and longbows anywhere from 90 180 pounds. That said samurai armour is thin compared to western armour so it doesn t need to be as heavy draw weight. I assume there will be a discrepancy in the generated energies between english bows and japanese bows because the release method of kyudo is supposed to increase arrow velocity beyond what draw. Most of the sources i have found state that the draw weight of a yumi was between 25 and 35 pounds.

A yumi with a 30 lb draw weight is capable at penetrating armour from a very close range. Yumi is the japanese term for a bow as used in english yumi refers more specifically to traditional japanese asymmetrical bows and includes the longer daikyū and the shorter hankyū used in the practice of kyūdō and kyūjutsu or japanese archery the yumi was an important weapon of the samurai warrior during the feudal period of japan it shoots japanese arrows called ya. Do modern yumi have any accessories. Your draw weight is 45 27 then you want a 45 50 28.

In modern kyūdō the draw weight is usually around 30 lbs. It is more about the meditation and not so much about hitting a target at a big distance so heavier bows are not needed. Many modern bows are not designed for war so it s hard to base it on that. What was the draw weight of a historical yumi japanese bow.

6 tall 72 2 5 28 8 draw length or 28 5 draw weight selection chart. You can get heavier bows though if that is your wish. Most war yumi that i have found have a draw weight of about 85 90 lbs. Nieminen which examines the design and physics of two of the most famous classes of bows found in asia.