A sled, skid, sledge, or sleigh is a land vehicle that slides across a surface, usually of ice or snow. It is built with either a smooth underside or a separate body supported by two or more smooth, relatively narrow, longitudinal runners similar in principle to skis. This reduces the amount of friction, which helps to carry heavy loads.
Some designs are used to transport passengers or cargo across relatively level ground. Others are designed to go downhill for recreation, particularly by children, or competition. (Compare cross-country skiing with its downhill cousin.) Shades of meaning differentiating the three terms often reflect regional variations depending on historical uses and prevailing climate.
In British English, sledge is the general term, and more common than sled. Toboggan is sometimes used synonymously with sledge but more often to refer to a particular type of sledge without runners. Sleigh refers to a moderate to large-sized, usually open-topped vehicle to carry passengers or goods, and typically drawn by horses, dogs, or reindeer.
In American usage sled remains the general term but often implies a smaller device, often for recreational use. Sledge implies a heavier sled used for moving freight or massive objects. Sleigh refers more specifically than in Britain to a vehicle which is essentially a cold-season alternative to a carriage or wagon and has seating for passengers; what can be called a dog-sleigh in Britain is known only as a dog-sled in North America.
The word sled comes from Middle English sledde, which itself has the origins in Middle Dutch word slēde, meaning 'sliding' or 'slider'. The same word shares common ancestry with both sleigh and sledge. The word sleigh, on the other hand, is an anglicized form of the modern Dutch word slee and was introduced to the English language by Dutch immigrants to North America.
Sleds are especially useful in winter but can also be drawn over wet fields, muddy roads, and even hard ground if one helps them along by greasing the blades ("grease the skids") with oil or alternatively wetting them with water. For an explanation of why sleds and other objects glide with various degrees of friction ranging from very little to fairly little friction on ice, icy snow, wet snow, and dry snow, see the relevant sections in the articles on ice and ice skating. The traditional explanation of the pressure of sleds on the snow or ice producing a thin film of water and this enabling sleds to move on ice with little friction is insufficient. 
Sleds and sledges were found in the Oseberg "Viking" ship excavation. The sledge was also highly prized, because – unlike wheeled vehicles – it was exempt from tolls.
Until the late 19th century, a closed winter sled, or vozok, provided a high-speed means of transport through the snow-covered plains of European Russia and Siberia. It was a means of transport preferred by royals, bishops, and boyars of Muscovy. Several royal vozoks of historical importance have been preserved in the Kremlin Armoury.
Man-hauled sledges were the traditional means of transport on British exploring expeditions to the Arctic and Antarctic regions in the 19th and early 20th centuries, championed for example by Captain Scott. Dog sleds were used by most others, such as Roald Amundsen.
Modern sleds Edit
Some of these originally used draft animals but are now more likely to be pulled by an engine (snowmobile or tractor). Some use human power.
- The word "motor sled" is colloquial term for a snowmobile
- The Inuit qamutiik is uniquely adapted for travel on the sea ice.
- The pulk (or ahkio) is a traditional sled of the Lapland region, used for expeditions, mountain rescue, and cold weather military units to haul equipment, supplies, and passengers.
- Rescue toboggan, developed from the pulk
- Stone boat, a farm vehicle used for moving heavy objects such as stones or haybales; can be towed by a tractor.
Today some people use kites to tow exploration sleds.
- Toboggan, an elongated sled without runners, usually made from wood or plastic, but sometimes made from sheet metal.
- Saucer, a round sled curved like a saucer (see also flying saucer), also without runners and usually made out of plastic or metal
- Flexible Flyer, a steerable wooden sled with thin metal runners
- Kicksled or spark, a human-powered sled
- Inflatable sled or tube, a plastic membrane filled with air to make a very lightweight sled, like an inner tube
- Foam slider, a flat piece of durable foam with handles and a smooth underside
- Backcountry sled, a deep, steerable plastic sled to kneel on with pads and a seat belt
- Airboard, a snow bodyboard, i.e. an inflatable single-person sled
A few types of sleds are used only for a specific sport:
- Bobsled (British: bobsleigh), an aerodynamic composite-bodied vehicle on lightweight runners
- Luge and the skeleton, tiny one or two-person sleds with runners
- A cutter is an open, lightweight, horse-drawn sleigh that usually holds no more than two people. It was developed in the United States around 1800. Historic styles were often quite decorative. About 1920, cutter racing began in the American Rocky Mountain west, first using a simple homemade chariot on skis, later replaced by a bicycle-wheeled chariot that was also pulled over snow.
- Troika, a traditional Russian vehicle drawn by three horses, usually a sled, but it may also be a wheeled carriage.
- A sled or "stone boat", seen in truck and tractor pulling and horse pulling. A flat sled able to carry increasing amounts of weight to determine the maximum load the animal or machine can pull.
See also Edit
- "Collins 2012 digital edition".
- "Collins 2012 digital edition".
- "Collins 2012 digital edition".
- The Macquarie Dictionary, 2nd ed. North Ryde: Macquarie Library. 1991.
- "thefreedictionary entry on "sled"". Farlex.
- "thefreedictionary entry on "sleigh"".
- "The surprising science of why ice is so slippery"
- McCoy, Terrence (2 May 2014). "The Surprisingly Simple Way Egyptians Moved Massive Pyramid Stones Without Modern Technology". The Washington Post. Retrieved 1 February 2019.
- sledspace.com (2008). "Sledspace.com – Snowmobile Community". Retrieved 18 April 2011.
- "Snowracer" (in German). schlitten-bob.de. Retrieved 19 May 2013.
- Parigon Sleds
- "Hörnerschlitten" (in German). schlitten-bob.de. Retrieved 19 May 2013.
- "Snow Racer von Stiga finden Sie in der Rubrik Stiga Schlitten!" (in German). schlitten-bob.de. Retrieved 19 May 2013.
- "Airboards - from ski slopes to backcountry!". Retrieved 17 February 2018.
- "Herzlich Willkommen !" (in German). schlittendiscount.de. Retrieved 19 May 2013.
- "Hörnerschlitten" (in German). hoernerrodel.de. Retrieved 19 May 2013.
- "Cutter sleigh". Encyclopædia Britannica. Retrieved 20 August 2019.
- "Starting traditions: Cutter racing beings in Thayne". Wyoming Livestock Roundup. Retrieved 20 August 2019.
- "The Sled". Lake Country Antique Tractor Association. Archived from the original on 28 March 2012. Retrieved 27 July 2011.