There were several variants of multiprod crossbow in use during Tang and Song period, which will be detailed below:
Shuang Gong Chuan Nu (雙弓床弩, lit. 'Double-prod bed crossbow')
Also known as Liang Gong Nu (兩弓弩, lit. 'Two prod crossbow') during Tang period, this crossbow has two prods mounted facing opposite directions of each other. It is spanned by a simple windlass.
Da He Chan Nu (大合蟬弩, lit. 'Great combined cicada crossbow')
Drawing of a Da He Chan Nu, from 'Wu Bei Zhi (《武備志》)'. |
*NOTE: A Song Dynasty pace can be roughly equated to 1.536 metre or 1.68 yard.
Xiao He Chan Nu (小合蟬弩, lit. 'Small combined cicada crossbow')
Drawing of a Xiao He Chan Nu, from 'Wu Bei Zhi (《武備志》)'. |
San Gong Chuang Nu (三弓床弩, lit. 'Three prod bed crossbow')
Also known as Ba Niu Nu (八牛弩, lit. 'Eight ox crossbow'), this crossbow mounts three prods, two prod facing forward and one prod facing backward. It is significantly more powerful than its double-prod counterpart.
It is speculated that Kaman-i Gav (lit. 'Ox bow') used by the Mongols during the siege of the Hashashin castle of Maymum Diz in 1256 was in fact a San Gong Chuang Nu.
San Gong Nu (三弓弩, lit. 'Three prod crossbow')
Drawing of a San Gong Nu, from 'Wu Bei Zhi (《武備志》)'. |
Ci San Gong Nu (次三弓弩, lit. 'Lesser three prod crossbow')
Drawing of a Ci San Gong Nu, from 'Wu Bei Zhi (《武備志》)'. |
Dou Zi Nu (㪷子弩, lit. 'Bucket crossbow')
Dou Zi Nu is a modified multiprod crossbow that mounts an iron bucket to its string. Instead of shooting a single large crossbow bolt, Dou Zi Nu shoots dozens of normal-sized arrows from its iron bucket over a large area.
Presumably, all multiprod crossbows can be converted into Dou Zi Nu.
Dou Zi Nu (㪷子弩)
Drawing of a Dou Zi Nu, from 'Wu Bei Zhi (《武備志》)'. |
San Gong Dou Zi Nu (三弓㪷子弩)
Drawing of a San Gong Dou Zi Nu, from 'Wu Bei Zhi (《武備志》)'. |
Shou She Nu (手射弩, lit. 'Hand-shot crossbow')
Shou She Nu is the handheld version of Chinese multiprod crossbow. While small enough to be handled by one person, its accompanying frame (with windlass) still requires two or more men to operate, so it is not a man-portable weapon in the strictest sense.
The details of operation of Shou She Nu is unknown. It is possible that the crossbow is attached to the wooden frame for spanning purpose only. Once cocked and loaded, the crossbow is then removed from the frame and shot by hand.
Shou She He Chan Nu (手射合蟬弩, lit. 'Hand-shot combined cicada crossbow')
Shou She He Chan Nu is the handheld version of double-prod crossbow. Unfortunately, no other information is available for this crossbow.
Shou She Nu (手射弩)
Drawing of a Shou She Nu, from 'Wu Bei Zhi (《武備志》)'. |
Shou She Dou Zi Nu (手射㪷子弩, lit. 'Hand-shot bucket crossbow')
Shou She Dou Zi Nu is the handheld version of Dou Zi Nu. Described as the smallest of multiprod crossbows, it requires less than five men to span, but still retains a range of around one hundred and twenty paces.
Crossbow bolt
Zao Tou Jian (鑿頭箭, lit. 'Chisel-headed arrow')
Like its namesake, Zao Tou Jian has a chisel-like arrowhead, presumably designed to inflict wide gaping wounds. The fletching of Zhao Tou Jian can be made of either iron or feathers.
Zao Tou Jian comes in various sizes, the smallest variant can apparently be loaded into the iron bucket of a small Dou Zi Nu.
Ta Jue Jian (踏撅箭, lit. 'Stepping arrow')
Ta Jue Jian is designed to be used as scaling ladder for besieging troops. As such, its has a large barbed arrowhead designed to pierce and lodge firmly into hard surfaces, as well as a thick and sturdy shaft that can withstand the force of impact and the weight of armoured trooper.
With the power of multiprod crossbow behind it, this type of crossbow bolt should be able to punch into stone brick.
Yi Qiang San Jian Jian (一鎗三劒箭, lit. 'One spear three swords arrow')
Yi Qiang San Jian Jian is the largest and most deadly of the multiprod crossbow bolts. Essentially a heavy spear with three iron fletches (the three "swords"), it is only lauched from the largest San Gong Chuang Nu.
Dou Zi Jian (㪷子箭)
Dou Zi Jian is actually not a specific type of arrow, but a catch-all term for all normal-sized arrows that can be loaded into the iron bucket of Dou Zi Nu. It is also known as Han Ya Jian (寒鴉箭, lit. 'Jackdaw arrow').
Black powder incendiary bolt
All of the aforementioned crossbow bolts can be upgraded with incendiary or poison smoke warheads (or both) to further enhance their destructive potentials. A particular nasty version is the incendiary Dou Zi Jian that can set a wide area ablaze.
Just how powerful is the Chinese multiprod crossbow?
Unfortunately, written records are silent on the matter of dimensions and precise draw weights of these siege weapons, so all estimations on the power of multiprod crossbow are merely educated guesses. That being said, all known multprod crossbow variants inevitably come with windlasses that require at least two operators, so they must be quite powerful.
Moreover, since none of the windlasses look like they can be used by more than four operators (let alone one hundred), records of "X number of men required to span the crossbow" must therefore refer to the number of men required to span the crossbow without using windlass, perhaps in a manner not too dissimilar to tug-of-war. Even under the most unfavourable assumption that one man can only pull a meagre 12 kilograms/22.5 pounds (in reality a physically fit and well-trained man can pull roughly twice his own weight), a large San Gong Nu spanned by one hundred men would still have a draw weight of roughly 2645 pounds!
Replica
China's CCTV-9 television channel created a full-scale replica of San Gong Chuang Nu for its ancient Chinese weapon documentary series. The replica manages an impressive 61 inches powerstroke, but only has a paltry draw weight of 390 pounds (incredibly underpowered for a weapon of this size). It can only shoot a spear-sized crossbow bolt (size and weight not given, but most likely too heavy for the draw weight) at an abysmal 91.8 fps.
A complete failure, regrettably.
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What do you think was missing from the restoration that made it so weak?
ReplyDeleteDraw weight. The draw weight is way too small for something that big (390 lbs is the draw weight of a medium-sized handheld crossbow). It should be several times stronger.
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