NASA's rocket transport vehicle has tracks, not wheels.
The dragline bucket excavators used in quarrys and open cast mines, use a 'walking' method to move, not wheels.
As above, the largest wheel driven vehicle currently, is the Leibherr T-282B.
However, in the 1960s the US Army developed two experimental overland trains, essentially oversized semi-trailer trucks that could travel over almost any terrain. Their intention was to be able to handle logistics without being dependent on local road systems, thereby improving their ability in the field. Road trains are in used in certain roles today, but these US Army examples appear to be the only offroad examples built.
In 1955 LeTourneau was given a contract for a development vehicle that became known as the LCC-1. It consisted of a large control cab containing a diesel-powered generator that sent power to all of wheels on both the cab and the four cargo trailers. The wheels were just over 10 feet tall and very wide, in order to allow the vehicle to have a low ground pressure and be able to travel over tundra. The control cab was itself articulated into two compartments; a heated driving compartment in front for the crew of three, and a rear section containing the 600 hp diesel engine, generators and fuel tanks. The cab also sported a powered crane on the rear.It is now derilict and in a scrap yard at Fort Wainwright, outside Fairbanks.
LCC-1 was so successful that the Army contracted for a larger version, the Overland Train Mark II. Generally similar in concept, the Mark II included a number of features to allow the train to grow to any length. For instance, it was not possible to steer such a train from the front alone, the friction from trying the drag the huge wheels sideways until they followed would be immense. In order to solve this the Mark II included an innovative steering system that turned the wheels on the individual cars, but only once they reached the position where the driver had initially turned the wheel. Likewise the power was no longer provided only from the cab, but could be increased by adding additional power cars along the train. To save weight the power was now being provided by gas turbine engines instead of a traditional diesel.
The Mark II had a much larger six-wheeled cab that was over 30 feet tall and was no longer articulated due to the ability for all the wheels to be steered. The turbine engine was much smaller than the diesel it replaced, allowing the interior to support a crew of six with sleeping quarters, toilets and a galley. An additional two power cars and ten cargo cars were built for testing. In total the train now stretched over 570 feet. On flat ground it could carry 150 tones of cargo at about 20 mph. All that remains of the Mark II is the control cab, the rest was sold off to a local scrap dealer.
2007-05-18 02:32:03
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answer #1
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answered by Nightworks 7
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Because tracked and wheeled vehicles fulfill different missions. In some situations wheeled vehicles are quite useless while in other situations they are superior and vice-versa. They compliment, not compete with each other - a fact people couldn't seem to grasp 10 years ago when the Stryker Brigades were being formed.
2016-05-22 03:54:13
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answer #2
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answered by mable 4
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Bucket-wheel excavators- RB293 bucket wheel excavator manufactured by MAN Takraf is recognised by Guinness World Records as the largest land vehicle
2007-05-19 04:30:15
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answer #3
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answered by Anonymous
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I'm sure the largest wheeled vehicle is a dump truck in an open cast mine in Brazil, there's 2 of them, I think I'm right in saying they are made in Japan by Komatsu, they get then to Brazil in containers and then assemble them in the mine.
I think they carry 1200 tons
2007-05-20 00:55:09
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answer #4
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answered by Anonymous
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It used to be the Crawler-Transporter that NASA used to transport the assembled Saturn Five rocket from the Vertical Assembly Building to the launch pad.
This was eventually superseded by the 'Bagger 288', an earth excavating machine. See link for picture.
2007-05-20 04:38:10
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answer #5
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answered by john g 5
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Surely it is the new airbus A 380. The size of that thing, it is larger than those earth mover things people are on about and has a much larger load, with all the equipment and engines and, if they ever do comercialise it, passengers (it is currently only use as a freight plane...i think, i may be wrong).
2007-05-19 09:54:04
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answer #6
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answered by Anonymous
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The largest i have known consisted of four tractor units with two trailer beds which had 250 axles and carried a12,000 ton oil rig!
2007-05-18 00:00:45
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answer #7
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answered by Anonymous
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T 282 B mining truck
http://www.primidi.com/2004/06/21.html
2007-05-17 22:50:52
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answer #8
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answered by Anonymous
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It is the Lancer Boss G range of fork lift trucks that was made for Arabia
2007-05-20 09:21:53
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answer #9
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answered by bty937915 4
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Saw this on TV I think. A huge earthmoving vehicle on an opencast mining project somewhere.
2007-05-17 22:45:57
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answer #10
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answered by Anonymous
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