Flail (other)
Flail may refer to: * Flail (tool), an agricultural implement for threshing * Flail (weapon), a ball-on-a-chain bludgeon wielded with one hand by armored knights in single combat or medieval battles * Flail, the cutting part in some designs of brush hog, stump grinder, and woodchipper * Mine flail, a vehicle mounted device for removing land mines See also * Flail chest Flail chest is a life-threatening medical condition that occurs when a segment of the rib cage breaks due to trauma and becomes detached from the rest of the chest wall. Two of the symptoms of flail chest are chest pain and shortness of breath. ...

Flail (tool)
A flail is an agricultural tool used for threshing, the process of separating grains from their husks. It is usually made from two or more large sticks attached by a short chain; one stick is held and swung, causing the other (the swipple) to strike a pile of grain, loosening the husks. The precise dimensions and shape of flails were determined by generations of farmers to suit the particular grain they were harvesting. For example, flails used by farmers in Quebec to process wheat were generally made from two pieces of wood, the handle being about long by in diameter, and the second stick being about long by about in diameter, with a slight taper towards the end. Flails for other grains, such as rice or spelt, would have had different dimensions. Flails have generally fallen into disuse in many nations because of the availability of technologies such as combine harvesters that require much less manual labour. But in many places, such as Minnesota, wild rice can only be harve ...
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Flail (weapon)
A flail is a weapon consisting of a striking head attached to a handle by a flexible rope, strap, or chain. The chief tactical virtue of the flail is its capacity to strike around a defender's shield or parry. Its chief liability is a lack of precision and the difficulty of using it in close combat, or closely-ranked formations. There are two broad types of flail: a long, two-handed infantry weapon with a cylindrical head, and a shorter weapon with a round metal striking head. The longer cylindrical-headed flail is a hand weapon derived from the Flail (tool), agricultural tool of the same name, commonly used in threshing. It was primarily considered a peasant's weapon, and while not common, they were deployed in Germany and Central Europe in the later Late Middle Ages. The smaller, more spherical-headed flail appears to be even less common; it appears occasionally in artwork from the 15th century onward, but many historians have expressed doubts that it ever saw use as an actu ...
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Woodchipper
A tree chipper or woodchipper is a machine used for reducing wood (generally tree limbs or trunks) into smaller woodchips. They are often portable, being mounted on wheels on frames suitable for towing behind a truck or van. Power is generally provided by an internal combustion engine from . There are also high-power chipper models mounted on trucks and powered by a separate engine. These models usually also have a hydraulic winch. Tree chippers are typically made of a hopper with a collar, the chipper mechanism itself, and an optional collection bin for the chips. A tree limb is inserted into the hopper (the collar serving as a partial safety mechanism to keep human body parts away from the chipping blades) and started into the chipping mechanism. The chips exit through a chute and can be directed into a truck-mounted container or onto the ground. Typical output is chips on the order of across in size. The resulting wood chips have various usages such as being spread as a g ...
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Mine Flail
A mine flail is a vehicle-mounted device that makes a safe path through a minefield by deliberately detonating land mines in front of the vehicle that carries it. They were first used by the British during World War II. The mine flail consists of a number of heavy chains ending in fist-sized steel balls (flails) that are attached to a horizontal, rapidly rotating rotor mounted on two arms in front of the vehicle. The rotor's rotation makes the flails spin wildly and violently pound the ground. The force of a flail strike above a buried mine mimics the weight of a person or vehicle and causes the mine to detonate, but in a safe manner that does little damage to the flails or the vehicle. World War II The idea is commonly attributed to a South African soldier, Captain Abraham du Toit. A test rig was constructed in South Africa and results were so encouraging that du Toit was promoted and sent to England to develop the idea. Before du Toit left for England, he described his idea to ...
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