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  2. STS-61 - Wikipedia

    en.wikipedia.org/wiki/STS-61

    STS-61 was NASA 's first Hubble Space Telescope servicing mission, and the fifth flight of the Space Shuttle Endeavour. The mission launched on December 2, 1993, from Kennedy Space Center (KSC) in Florida. The mission restored the spaceborne observatory's vision (marred by spherical aberration in its mirror) with the installation of a new main ...

  3. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    Escalator. For the album by Sam Gopal, see Escalator (album). An escalator is a moving staircase which carries people between floors of a building or structure. It consists of a motor -driven chain of individually linked steps on a track which cycle on a pair of tracks which keep the step tread horizontal.

  4. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin, a 2-or- -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel ...

  5. Semi-trailer truck - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer_truck

    Conventional style cab tractor A cab over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck, (also known by a wide variety of other terms - see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms

  6. STS-95 - Wikipedia

    en.wikipedia.org/wiki/STS-95

    STS-88 (93) →. STS-95 was a Space Shuttle mission launched from Kennedy Space Center, Florida on 29 October 1998, using the orbiter Discovery. It was the 25th flight of Discovery and the 92nd mission flown since the start of the Space Shuttle program in April 1981. It was a highly publicized mission due to former Project Mercury astronaut and ...

  7. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    A door may swing across the landing at the bottom of the flight but must leave a clear space of at least 400 across the whole landing Tapered steps. There are special rules for stairs with tapered steps as shown in the image Example of Winder Stairs above Alternate tread stairs can be provide in space saving situations Guarding

  8. Landing gear - Wikipedia

    en.wikipedia.org/wiki/Landing_gear

    The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.

  9. STS-5 - Wikipedia

    en.wikipedia.org/wiki/STS-5

    STS-5. The SBS-3 satellite with attached PAM-D motor is deployed from Columbia. STS-5 was the fifth NASA Space Shuttle mission and the fifth flight of the Space Shuttle Columbia. It launched on November 11, 1982, and landed five days later on November 16, 1982. STS-5 was the first Space Shuttle mission to deploy communications satellites into ...

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