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A sandrail, also called a sand rail, rail, or sand car, is a lightweight off-road motor vehicle specifically built for traveling in sandy terrain. Synonymously referred to as dune buggies, a sandrail is a type of speciality vehicle.^[1] They are popularly operated on actual sand dunes. Sandrails can be driven on other types of terrain but are designed specifically for sand.

At the end of World War II thousands of soldiers returning from the war had spent years driving Jeeps, tanks, and half-tracks with few or no roads. Having an increased disposable income, these GIs formed the original core of off-road enthusiasts. Initially, they used surplus Jeeps and cut-up cars to build their off-road vehicles. Soon these "off-roaders" discovered that with little more than a skid plate, they could get a stock air-cooled Volkswagen Beetle to go almost anywhere.^[2] Throughout the 1950s the sport continued to develop.

In 1958 Pete Beiring of Oceano, Calif., took the body frame or "pan" from a damaged Volkswagen and shortened it into a new machine that eventually became the precursor to the dune buggy. This eventually led to the first production dune buggy called the "Sportster", which was developed around 1960 by the EMPI Imp Company. It was an angular sheet metal vehicle built on a stripped-down Volkswagen chassis. Many others followed including the ever popular Meyers Manx design.^[3] Dune buggies had a style all their own with fiberglass siding and other "heavy" body features.

As the late 1960s and early '70s approached, enthusiasts developed lighter and more powerful sand vehicles capable of ascending steeper and higher dunes. Many started experimenting at home by building super light weight vehicle frames from metal tubing, often without a roll cage. Many were nothing more than a frame, engine, transmission, wheels and one or two seats. Because of their versatility, light weight and simplicity the air-cooled Volkswagen engine and transmission were the power plant of choice for many owners. By placing the motor and transmission in the rear of the frame it allowed the front of the sandrail to remain extremely light and thus able to "float" over the sand dunes. An added value of placing the engine in the rear of the vehicle was that heat created by the motor did not blow into the face of the driver and passengers. From the 1970s forward, sandrail builders continued to push the delicate balance between weight and power.

When it comes to serious sand dunes, most off-road vehicles including those with four wheel drive are relatively top heavy and can only safely climb or descend steep hills with a mostly perpendicular approach to inclines or downhills. In the case of driving up a steep sand dune, many would simply "dig-in" and get stuck.

Sandrails are ultra lightweight vehicles often weighing in at 800 and 1500 pounds (≈363 and ≈680 kg). They typically use high flotation smooth or farm implement front tires and special rear paddle tires, allowing it to skim over the surface of the sand without getting stuck. A sandrail has a low center of gravity, permitting it to make tight turns even on the face of a sand dune.

Sandrail frames are built from a tubular space frame chassis that incorporates an integrated roll cage. The distinction between a sandrail and dune buggy or sand car is that the sandrail will rarely have windows, doors, fenders, or full body panels. The sandrail will also be a lighter weight vehicle compared to the sandcar. On most sandrails, the engine is typically at the rear. Some sandrails also use a mid-engine configuration. This design offers favorable weight distribution and traction, which is very desirable for dune "hill-climbing".

Originally becoming popular in the 1960s, sandrails used lightweight air-cooled engines like the Volkswagen engine from the VW Beetle and Porsche (~200 pounds) or the Chevrolet Corvair, Mitsubishi Minica and Cosworth DFV (~350 pounds). Because of the availability of affordable parts, the Volkswagen engine continues to be the mainstay of many sandrails today. At some point in the late 1970s in the wake of the Ford Pinto product liability cases, the first alternative engine was sourced from the Pinto, primarily the 2.0L and 2.3L. More recently, some enthusiasts have turned to lighter weight water-cooled engines such as the Subaru boxer or GM Ecotec engines.^[4]

The need for more power comes from necessity and desire when driving in steep sand dunes. This has driven sandrail engine builders to add performance features to engines such as the stock (24 to 50 horse power) Volkswagen engine. These include: larger pistons, turbochargers, dual racing carburetors, fuel injection, and high performance cylinder heads. Some performance engines can run on premium unleaded gasoline. However, many high performance engines must use racing fuel or fuel additives. A high performance sandrail Volkswagen engine can produce well into the 170-200+ horse power range and as high as 700 horse power with methanol fuel.^[5]

Most sandrails use a manual transmission, although automatic transmissions are used as well.^{[6][page needed]}

Early sandrails often consisted of little more than a steering wheel, brakes and accelerator. However, today an entire industry is built around all kinds of accessories such as HID and LED headlamps, radios, passenger communications headsets and GPS navigation devices.

Some states in the USA, such as Arizona and Utah, allow the registration of sandrails and other primarily off-road vehicles for "on-road" use. In these states, sandrails registered for on-road use usually must meet the minimum insurance coverage required by normal vehicles.^[7] Additionally, they may require modifications to be road worthy. These requirements typically include a wind shield, turning signals, and license plate. These requirements may vary by state.

Sandrails have been employed by US state authorities, the United States Border Patrol and even the military. They are still in use today by the Navy SEALs. The military design of these vehicles is based on the Chenowth Advanced Light Strike Vehicle model and have been modified for a third seat above the engine to control a .50 caliber machine gun and other armaments. State authorities, such as rangers at sand dune parks sometimes employ sandrails, removing the passenger seat to convert the sandrail into a makeshift ambulance with a stretcher.

Although sandrails are primarily designed for the sand, they have been successfully used on "soft pack" dirt, mud and even snow. Some of these types of applications usually require the use of off-road type tires versus "sand" tires. They are typically not well suited for rocky terrain due to their mostly limited suspension and lighter duty frames.

Accidents most often occur in collisions with other off-road vehicles, and are frequently the result of not being seen. In many dune areas, all sand vehicles (motorcycles, quads, sandrails, UTVs and sandcars) are required to use an eight-foot antenna whip and flag. This is critical to being seen by other vehicles as a driver traverses from one dune to the next.^[8] Most sandrails employ a variety of safety features for the driver and passengers. The most common is the use of a three-point safety belt system. Many sand rails also utilize roll bar padding and fire extinguishers. More advanced safety features sometimes include: arm and wrist restraints, netting for large frame openings, automatic fuel cut-off switches and horns. Additionally, the use of eye protection (goggles and ballistic-grade glasses) is considered a necessity. Finally, the use of helmets while "duning" is increasing due to the advances in performance. Sand associations along with state and federal land management agencies work to provide dune safety information through pamphlets, online and in classes.

Due to its economical cost to build and maintain, access to new parts and good balance between weight and power, the sandrail continues to be used by many enthusiasts today.^[9] However, the heavier and typically more powerful sandcar now represents another style for duners.^[1] This style often employs mammoth cars weighing several thousand pounds and using highly advanced suspension systems and transmissions coupled with large performance V8 engines such as the latest GM LS engine series, Ford Coyote engine series or Range Rover engine series.

Associations such as ASA hold events throughout the year in some parts of the country for sand racing and hill climbing. Additionally, these associations provide representation for enthusiasts with legislators and land management officials.

Look up sand rail, sand-rail, or sandrail in Wiktionary, the free dictionary.

Arabian Desert ٱلصَّحْرَاء ٱلْعَرَبِيَّة
Desert near Sharjah, United Arab Emirates
Map of the Arabian Desert ecoregion
Ecology
Realm	Palearctic
Biome	deserts and xeric shrublands
Borders	List Gulf of Oman desert and semi-desert Mesopotamian shrub desert Middle East steppe North Saharan steppe and woodlands Persian Gulf desert and semi-desert Red Sea Nubo-Sindian tropical desert and semi-desert Tigris-Euphrates alluvial salt marsh
Geography
Area	1,855,470[1] km2 (716,400 mi2)
Countries	List Saudi Arabia Iraq Jordan Kuwait Oman Qatar United Arab Emirates Iran (khuzestan) Yemen Egypt (Sinai)
Conservation
Conservation status	critical/endangered[2]
Protected	4.368%[1]

The Arabian Desert (Arabic: ٱلصَّحْرَاء ٱلْعَرَبِيَّة) is a vast desert wilderness in West Asia that occupies almost the entire Arabian Peninsula with an area of 2,330,000 square kilometers (900,000 sq mi).^[3] It stretches from Yemen to the Persian Gulf and Oman to Jordan and Iraq. It is the fourth largest desert in the world and the largest in Asia. At its center is Ar-Rub' al-Khali (The Empty Quarter), one of the largest continuous bodies of sand in the world. It is an extension of the Sahara Desert.^[4]

Gazelles, oryx, sand cats, and spiny-tailed lizards are just some of the desert-adapted species that survive in this extreme environment, which features everything from red dunes to deadly quicksand. The climate is mostly dry (the major part receives around 100 mm (3.9 in) of rain per year, but some very rare places receive as little as 50 mm), and temperatures oscillate between very high heat and seasonal night time freezes. It is part of the deserts and xeric shrublands biome and lie in biogeographical realms of the Palearctic (northern part) and Afrotropical (southern part).

The Arabian Desert ecoregion has little biodiversity, although a few endemic plants grow here. Many species, such as the striped hyena, jackal and honey badger, have died out as a result of hunting, habitat destruction, overgrazing by livestock, off-road driving, and human encroachment on their habitat. Other species, such as the Arabian sand gazelle, have been successfully re-introduced and are protected at reserves.

The desert lies mostly in Saudi Arabia and covers most of the country. It extends into neighboring southern Iraq, southern Jordan, central Qatar, most of the Abu Dhabi emirate in the United Arab Emirates, western Oman, and northeastern Yemen. The ecoregion also includes most of the Sinai Peninsula in Egypt and the adjacent Negev desert in southern Israel.^[1]

The Rub' al-Khali desert is a sedimentary basin stretching along a south-west to north-east axis across the Arabian Shelf.^[5] At an altitude of 1,000 metres (3,300 ft), rock landscapes yield to the Rub' al-Khali, a vast stretch of sand whose extreme southern point crosses the center of Yemen. The sand overlies gravel or gypsum plains and the dunes reach maximum heights of up to 250 m (820 ft). The sands are predominantly silicates, composed of 80 to 90% quartz and the remainder feldspar, whose iron oxide-coated grains color the sands orange, purple, and red.

A corridor of sandy terrain known as the Ad-Dahna desert connects the An-Nafud desert (65,000 km² or 40,389 square miles) in the north of Saudi Arabia to the Rub' al-Khali in the south-east.^{[citation needed]} The Tuwaiq escarpment is an 800 km (500 mi) arc that includes limestone cliffs, plateaus, and canyons.^{[citation needed]} There are brackish salt flats, including the quicksands of Umm al Samim.^[2] The Sharqiya Sands, formerly known as Wahiba Sands of Oman are an isolated sand sea bordering the east coast.^[6][7]

The Arabian Desert has a subtropical, hot desert climate, similar to the climate of the Sahara Desert (the world's largest hot desert). The Arabian Desert is actually an extension of the Sahara Desert over the Arabian peninsula.

The climate is mainly dry. Most areas get around 100 mm (3.9 in) of rain per year. Unlike the Sahara Desert—more than half of which is hyperarid (having rainfall of less than 50 mm (2.0 in) per year)—the Arabian Desert has only a few hyperarid areas. These rare driest areas may get only 30 to 40 mm (1.6 in) of rain per year.

The Arabian Desert’s sunshine duration index is very high by global standards: between 2,900 hours (66.2% of daylight hours) and 3,600 hours (82.1% of daylight hours), but typically around 3,400 hours (77.6% of daylight hours). Thus clear-sky conditions with plenty of sunshine prevail over the region throughout the year, and cloudy periods are infrequent. Visibility at ground level is relatively low, despite the brightness of the sun and moon, because of dust and humidity.

Temperatures remain high year round. In the summer, in low-lying areas, average high temperatures are generally over 40 °C (104 °F). In extremely low-lying areas, especially along the Persian Gulf (near sea level), summer temperatures can reach 48 °C (118 °F). Average low temperatures in summer are typically over 20 °C (68 °F) and in the south can sometimes exceed 30 °C (86 °F). Record high temperatures above 50 °C (122 °F) have been reached in many areas of the desert, partly because its overall elevation is relatively low. ^{[citation needed]}

The Arabian Desert ecoregion has about 900 species of plants.^[8] The Rub'al-Khali has very limited floristic diversity. There are only 37 plant species, 20 recorded in the main body of the sands and 17 around the outer margins. Of these 37 species, one or two are endemic. Vegetation is very diffuse but fairly evenly distributed, with some interruptions of near sterile dunes.^[2] Some typical plants are Calligonum crinitum on dune slopes, Cornulaca arabica (saltbush), Salsola stocksii (saltbush), and Cyperus conglomeratus. Other widespread species are Dipterygium glaucum, Limeum arabicum, and Zygophyllum mandavillei. Very few trees are found except at the outer margin (typically Acacia ehrenbergiana and Prosopis cineraria). Other species are a woody perennial Calligonum comosum, and annual herbs such as Danthonia forskallii.^[2]

There are 102 native species of mammals.^[8] Native mammals include the Arabian oryx (Oryx leucoryx), sand gazelle (Gazella marica), mountain gazelle (G. gazella), Nubian ibex (Capra nubiana), Arabian wolf (Canis lupus arabs), striped hyaena (Hyaena hyaena), caracal (Caracal caracal), sand cat (Felis margarita), red fox (Vulpes vulpes), and Cape hare (Lepus capensis).^[2] The Asiatic cheetah^[9] and Asiatic lion^[10] used to live in the Arabian Desert. The ecoregion is home to 310 bird species.^[8]

The area is home to several different cultures, languages, and peoples, with Islam as the predominant faith. The major ethnic group in the region is the Arabs, whose primary language is Arabic.

In the center of the desert lies Riyadh, the capital of Saudi Arabia, with more than 7 million inhabitants.^[11] Other large cities, such as Dubai, Abu Dhabi, or Kuwait City, lie on the coast of the Persian Gulf.

Natural resources available in the Arabian Desert include oil, natural gas, phosphates, and sulfur.^{[citation needed]}

Threats to the ecoregion include overgrazing by livestock and feral camels and goats, wildlife poaching, and damage to vegetation by off-road driving.^[2]

The conservation status of the desert is critical/endangered. In the UAE, the sand gazelle and Arabian oryx are threatened, and honey badgers, jackals, and striped hyaenas already extirpated.^[2]

4.37% of the ecoregion is in protected areas.^[1]

Saudi Arabia has established a system of reserves overseen by the National Commission for Wildlife Conservation and Development (NCWCD).^[2]

• Harrat al-Harrah Reserve (12,150 km²), established in 1987, is on the border with Jordan and Iraq, and protects a portion of the stony basaltic Harrat al-Sham desert. The reserve includes rough terrain of black basaltic boulders and extinct volcanic cones from the middle Miocene. It provides habitat to over 250 species of plants, 50 species of birds, and 22 mammal species.^[2]
• 'Uruq Bani Ma'arid Reserve (12,000 km²) is on the western edge of the Rub’ al-Khali. Arabian oryx and sand gazelle were reintroduced to the reserve in 1995.
• Ibex Reserve (200 km²) is south of Riyadh. It protects Nubian ibex and a reintroduced population of mountain gazelle.^[2]
• Al-Tabayq Special Nature Reserve is in northern Saudi Arabia, and protects a population of Nubian ibex.^[2]

Protected areas in the United Arab Emirates include Al Houbara Protected Area (2492.0 km²), Al Ghadha Protected Area (1087.51 km²), Arabian Oryx Protected Area (5974.47 km²), Ramlah Protected Area (544.44 km²), and Al Beda'a Protected Area (417.0 km²).^[12]

• ʿĀd
• Iram of the Pillars

Wikimedia Commons has media related to Arabian Desert.

• "Arabian Desert". Terrestrial Ecoregions. World Wildlife Fund.
• Arabian Desert (DOPA)
• [2]^{[permanent dead link]}