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What (who) is U-1 (semi-trailer) - definition
U-1 (semi-trailer)
The U-1 was a 1950s liquid hydrogen trailer designed to carry cryogenic liquid hydrogen (LH2) on roads being pulled by a powered vehicle. It was designed in response to requirements of the secret US government program code-named Suntan, which aimed to develop a high speed, high altitude hydrogen-powered military aircraft.
Semi-trailer truck
 pic2.JPG?width=200)
![40 foot container turnpike doubles have been tested in Sweden<ref>[https://www.combine-project.com/sites/default/files/content/resource/files/combine_output_wp3.4.pdf HCT as an enabler for Combined Transports - A Study on
potentials of implementing HCT-vehicles in Sweden]</ref>](https://commons.wikimedia.org/wiki/Special:FilePath/40 foot container turnpike double 2.jpg?width=200 "40 foot container turnpike doubles have been tested in Sweden<ref>[https://www.combine-project.com/sites/default/files/content/resource/files/combine_output_wp3.4.pdf HCT as an enabler for Combined Transports - A Study on
potentials of implementing HCT-vehicles in Sweden]</ref>")
![Traditional [[manual transmission]]s have 4-5 ratios on main shift and 3–4 on the auxiliary: pictured is a ''5×3'' with five main ratios and three auxiliaries](https://commons.wikimedia.org/wiki/Special:FilePath/5x3 Twin stick.JPG?width=200 "Traditional [[manual transmission]]s have 4-5 ratios on main shift and 3–4 on the auxiliary: pictured is a ''5×3'' with five main ratios and three auxiliaries")
![tandem axles]]](https://commons.wikimedia.org/wiki/Special:FilePath/Conventional 18-wheeler truck diagram.svg?width=200 "tandem axles]]")
![FAW]] semi-trailer truck in China](https://commons.wikimedia.org/wiki/Special:FilePath/FAW truck.jpg?width=200 "FAW]] semi-trailer truck in China")
![Tractor unit hauling tractor units in [[Idaho]]](https://commons.wikimedia.org/wiki/Special:FilePath/HuckepackCrop.JPG?width=200 "Tractor unit hauling tractor units in [[Idaho]]")
![A [[cab over]] semi-trailer](https://commons.wikimedia.org/wiki/Special:FilePath/Mercedes-Benz Actros truck.jpg?width=200 "A [[cab over]] semi-trailer")
![Silverstone]]](https://commons.wikimedia.org/wiki/Special:FilePath/Renault Sport articulated lorrys with extended tents @ Silverstone for Renault World Series.JPG?width=200 "Silverstone]]")
![53 foot container turnpike double in [[Canada]]](https://commons.wikimedia.org/wiki/Special:FilePath/Road train (27).jpg?width=200 "53 foot container turnpike double in [[Canada]]")
 with EU-trailer. 25.25 meters.jpg?width=200 "abbr=on}}")
![STAA double]] pup 28.5 foot trailers](https://commons.wikimedia.org/wiki/Special:FilePath/UPS Freight truck, Motor Cargo & Overnite trailers.jpg?width=200 "STAA double]] pup 28.5 foot trailers")
![UPS truck with triples in [[Nevada]]](https://commons.wikimedia.org/wiki/Special:FilePath/UPS Truck in Beatty Nevada (24.06.2009).jpg?width=200 "UPS truck with triples in [[Nevada]]")
![prime mover]] [[Kenworth]] and B double trailer combination](https://commons.wikimedia.org/wiki/Special:FilePath/B double logging truck in Australia.jpg?width=200 "prime mover]] [[Kenworth]] and B double trailer combination")
![A [[road train]] in Australia](https://commons.wikimedia.org/wiki/Special:FilePath/Road Train2.jpg?width=200 "A [[road train]] in Australia")
![B-double truck on the [[Sturt Highway]]](https://commons.wikimedia.org/wiki/Special:FilePath/Red B-double truck.jpg?width=200 "B-double truck on the [[Sturt Highway]]")
COMBINATION OF A TRACTOR UNIT AND ONE OR MORE SEMI-TRAILERS TO CARRY FREIGHT
Big rig; Eighteen wheeler; Tractor trailer; Articulated lorry; 18-wheeler; Tractor-trailer; Tractor-trailer truck; Tractor trailer truck; Semi truck; Big-rig; Semi-truck; 18Wheeler; Tractor trailers; Juggernaut (truck); Turnpike double; 18 wheelers; Transfer Truck; Semi-trailer trucks; Semi trucks; Semi-trucks; Semitrucks; Semitruck; Tractor-trailers; Transfer trucks; Truck and trailers; Transfer truck; 18-wheelers; Big-rigs; Articulated lorries; Turnpike Doubles; Eighteen Wheeler; 18 wheeler; Big Rig; Big rigs; Transport trailer; 18-wheel truck; Underride guard; Underride collision; Underrun collision; Truck and trailer; Mansfield bar; DOT bar; Semi-articulated truck; Semitrailer truck
A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by [a semitrailer) tractor trailer, or tractor-trailer, and in the UK as an artic or juggernaut. It is variously known as an articulated lorry (UK), articulated truck, semi-tractor, semi-tractor-trailer truck, semi-tractor-trailer, semi-tractor truck, semi-trailer truck, single truck, tractor, tractor-trailer truck, tractor truck, trailer, trailer truck, transfer truck, or transport truck, depending on the country and region.
tractor trailer
COMBINATION OF A TRACTOR UNIT AND ONE OR MORE SEMI-TRAILERS TO CARRY FREIGHT
Big rig; Eighteen wheeler; Tractor trailer; Articulated lorry; 18-wheeler; Tractor-trailer; Tractor-trailer truck; Tractor trailer truck; Semi truck; Big-rig; Semi-truck; 18Wheeler; Tractor trailers; Juggernaut (truck); Turnpike double; 18 wheelers; Transfer Truck; Semi-trailer trucks; Semi trucks; Semi-trucks; Semitrucks; Semitruck; Tractor-trailers; Transfer trucks; Truck and trailers; Transfer truck; 18-wheelers; Big-rigs; Articulated lorries; Turnpike Doubles; Eighteen Wheeler; 18 wheeler; Big Rig; Big rigs; Transport trailer; 18-wheel truck; Underride guard; Underride collision; Underrun collision; Truck and trailer; Mansfield bar; DOT bar; Semi-articulated truck; Semitrailer truck
¦ noun N. Amer. an articulated lorry.
Wikipedia
U-1 (semi-trailer)
The U-1 was a 1950s liquid hydrogen trailer designed to carry cryogenic liquid hydrogen (LH2) on roads being pulled by a powered vehicle. It was designed in response to requirements of the secret US government program code-named Suntan, which aimed to develop a high speed, high altitude hydrogen-powered military aircraft.
