Historical Yumi Draw Weight

Most war yumi that i have found have a draw weight of about 85 90 lbs. Short bows in europe were frequently 30 50 pounds and longbows anywhere from 90 180 pounds. Nieminen which examines the design and physics of two of the most famous classes of bows found in asia.

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The yumi is a long draw bow and delivers more energy than you might expect from the draw weight.

Historical yumi draw weight. Various later recurves composites or laminated bows could vary anywhere from 50 130 pounds though most were in the 80 100 pound range. Beginners usually start at about 25lb and experienced archers tend to use about 25 40lb women or 30 45lb men. However not the heavy warbows of historical battles. 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.

The full range of draw weights was between 100 185 lb f 440 820 n. Do modern yumi have any accessories. I am familiar with the english welsh longbow having made many and shot them for years. And the draw weight only matters if the archer has the strength to draw it.

And if data is available what would be the point blank kinetic energy of the arrows. I ve seen physician historian and bowyers opinions and the draw weight range estimated is from 70 to 200 lbs with an average of 120 lbs. What was the draw weight of a historical yumi japanese bow. 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.

In modern kyūdō the draw weight is usually around 30 lbs. Serving as an introduction to the physics of historic military technology we ll look at a paper by timo a. However given the nature of yoroi samurai armour they are relatively protective against piercing and slashing. 60 pounds is about as much as i can enjoy pulling i have not had an opportunity to shoot a yumi but i.

You can get heavier bows though if that is your wish. The japanese bow is superior on horseback though. What draw weight do yumi bows have. 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.

Other sources suggest significantly higher draw weights. Most of the sources i have found state that the draw weight of a yumi was between 25 and 35 pounds. The original draw forces of examples from the mary rose are estimated by robert hardy at 150 160 lb f 670 710 n at a 30 inch 76 2 cm draw length. Afaik there s no standard draw length at which these draw weights are measured.

A yumi with a 30 lb draw weight is capable at penetrating armour from a very close range. It is more about the meditation and not so much about hitting a target at a big distance so heavier bows are not needed.