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- “Taking your packages to new heights.”— Slogan of New Mombasa Uplift
The New Mombasa Orbital Elevator, commonly known as the Mombasa Tether, was a Space Elevator located at the heart of the East African Protectorate city of New Mombasa on Earth. It was used for lifting heavy ordnance from the surrounding port facilities into a station in geosynchronous orbit at the top of the elevator structure, a transport method much cheaper and more efficient than booster rockets filled with expensive fuel. The company in charge of the management of the space elevator was called New Mombasa Uplift.
- “The Mombasa space elevator!"
"It collapsed when the city got glassed."
"But the tether was thousands of kilometers high..."
"Yeah? Well now it's scattered all over the Savannah."
"Oh crap...”— Two Marines discussing the fate of the Space Elevator.
In the dawn of the 24th century, Mombasa was chosen to be the Earth's first tether city. As a cheap gateway to space, the elevator is the key to New Mombasa's economic and strategic importance. The presence of the elevator radically changed the structure of the city - service roads and a Mag-lev line radiate out from its base, connecting it to nearby warehouses and factories. The elevator's base resides on an artificial island full of warehouses and docking facilities, to provide more docking space for incoming cargo vessels. And it was this influx of business and trade brought in by the elevator that made New Mombasa the metropolis it was by the time of the Covenant invasion.
During the Battle of Mombasa, the elevator was shut down. When the Prophet of Regret retreated, his Flagship initiated Slipspace transition over the city, right beside the Orbital Elevator. The resulting shockwave swept through the structure, weakening it considerably.
Under an hour later on the same day, the damage from the Slipspace rupture was too much for the support structure to handle. It exploded at multiple points, and the tether snapped at some two kilometers above the surface. The upper portion of the tether was instantly pulled upward by its orbital counterweight, now severed from the anchor point. The lower section collapsed, leaving only a small portion of the lower support structure intact, even though heavily damaged. Several pieces of debris crashed around the city and the surrounding area, while more fallout presumably caused considerable damage to buildings near the tether.
A large portion of the tower's debris was left scattered around Earth's surface, while most of the tether was pulled into space, likely ending up in an unstable orbit around Earth. While the upper portion of the tower was slowly pulled up into space, debris such as support rings and cables rained down to the surface far as the town of Voi and its surrounding regions, leaving large areas littered with debris and damaging infrastructure, such as the Tsavo Highway. After the end of the Human-Covenant war on March, 2553, some debris from the elevator still remained in the area near Voi.
Halo 2 Edit
In Halo 2, the space elevator is visible throughout all the Earth levels, first as a thin line on the horizon in Outskirts, then later as a ringed tower in the skyline of Metropolis. Only at the end of that level is the player offered an unobstructed view of the structure from across the artificial canal.
At the end of the campaign level Metropolis, the flagship of the Prophet of Regret flees into slipspace with the In Amber Clad in hot pursuit. This in-atmosphere jump unleashes a wave of energy that scours the area. Originally this was thought to collapse the tower, but as seen in Halo 3: ODST, this wasn't the case.
Halo 3 Edit
The elevator was not seen again until the Halo 3 Announcement Trailer, in which several of its stabilizer rings lay shattered in the background hills. Concept art from the Halo 3 Zune confirmed that the wreckage of the space elevator would play an important part in the design of the Earth levels.
The elevator did make an appearance in the final game, with the player fighting through its ruins throughout the level Tsavo Highway and even hearing some dialogue concerning its fate from Marine allies.
Halo 3: ODST Edit
In Halo 3: ODST, the Space Elevator plays its most prominent role. The structure has been reimagined from its Halo 2 incarnation; its base is located on an artificial island west of the city center, with MagLev Train lines leading to it, instead of the center of the Mombasa island in Halo 2. Its general appearance has also been changed, with a different, near-symmetrical base structure, and an additional support structure surrounding the lower part of the tether.
While it was originally thought that the elevator collapsed instantly when the Slipspace rupture shook it apart, it was first revealed in the "Keep it Clean" teaser that the elevator did not in fact collapse instantly. In the game, the player is able to witness the actual failure and collapse of the elevator during the level Uplift Reserve, played from the perspective of Corporal Taylor "Dutch" Miles. The wreckage of the elevator can be seen throughout the levels of the game, with its debris scattered around the city and the ocean.
- When the elevator snaps, the upper half is sucked into space, while the lower half, as well as some debris from the upper half, is scattered across the landscape. Some original concepts show that the tether was supposed to simply fall to the ground in its entirety. This was likely changed for realism, as if a space elevator was to be cut at its anchor point on Earth's surface, the outward force exerted by the counterweight would cause the entire elevator to rise upward into an unstable orbit. It is, however apparent, that this was taken into account already in Halo 3, as the main tether itself is not seen among the debris, which mainly includes support rings and cables, indicating that the support structures around the tether fell to the ground as the majority of the tower was pulled upward.
- Several maps of New Mombasa seen during the Audio Logs in Halo 3: ODST show the Mag-Lev lines from the space elevator's base leading to the Mombasa island. However, as seen in-game as well as several other maps, the train lines lead only to the mainland north of the elevator.
- During the level Tsavo Highway in Halo 3, when two marines have a brief dialogue about the fate of the elevator, they erroneously refer to it having collapsed when the city was glassed. As seen in Halo 3: ODST, it collapsed well before the glassing of the city, due to its structure weakening from the Slipspace rupture. This may be a mistake on Bungie's part, or the marines were simply misinformed of the destruction.
- The support structure surrounding and anchoring the tether could not exist as designed in this particular concept. This is because quantum mechanics explains that it is not possible for a solid to exist that has sufficient compressive strength to maintain structural integrity. That is, even while being built, the support structure would spectacularly explode outward at the base under its own weight. With no underlying support structure left, the support rings would pancake and the whole tower will come crashing down. The orbital tether itself is a possible concept, and models for orbital elevators that lack such support frames are far more likely.
- In Halo 3: ODST, during "Prepare To Drop" the space elevator's stabilizer rings can be seen held by 4 separate support cables, however during the missions "Tayari Plaza" and "Uplift Reserve" these cables are absent just displaying floating rings.
Concept Art/Pre-Release MaterialEdit