Ok, do you recall from your science class in elementary school that coal, when compressed, creates diamonds? And that, when diamonds are compressed, packing peanuts are formed? Well, the engineers responsible for creating the Urbie endeavored to discover the result of highly-compressed packing peanuts. The initial experiment was a disaster, with the graviton flux in the laboratory's attached lunchroom leading to a lunchsplosion, and John Crapper, the team lead, was fatally impaled by a flying banana. The other scientists, however, determined not to let Mr. Crapper's fate lead to the end of the project, soldiered on, and the Mannheim Core was created.
Sadly, the fall of the Star League led to the abandonment of the Mannheim Project, along with so many other brilliant undertakings across the Inner Sphere, as the flame of mankind's imagination was snuffed by the ensuing conflicts. Thus, while not apparent to current-timeline IS manufacturers who are essentially 3D-printing Urbanmechs from their factories they no longer understand, the Urbanmech represents the living embodiment of the Star League: incredible technological advancement, undertaken at great cost, for the benefit of mankind.
Clan scientists, however, have not lost the knowledge of the Mannheim Project, but are hesitant to tamper with its results, as they hold it in a sort of religious reverence; it is, after all, a very tangible piece of the lost Star League, and is respected along the same lines of thought as the Orion, being the Great Father's mech of choice. Thus, as Clan Wolf created the updated, but not significantly altered Orion IIC, the scientist caste of Clan Coyote lovingly crafted the Urbanmech IIC, which retained its core values and the results of the Mannheim Project, but was updated with the finest technology the Clans could muster at the time of its creation. It is widely considered to be the embodiment of Clan technological supremacy, as well as a shining beacon across known space, that the Star League will never be forgotten.
William Mountbank, on 22 January 2016 - 07:56 AM, said:
Clan scientists claim that if enough Urban Mechs gather in one place, the accumulated negative energy could open a portal to whichever universe David Bowie and Freddie Mercury currently exist in...
Pretty sure that does not occur until The Society comes into play, and the Wars of Reaving shake things up in Clan space.