Lunar Wars World

In the year 2087, when a military force called the Lunar Empire of Giganos has risen and captured the Moon. Their stated goal is the rebirth of mankind, but their primary intention by some of its members is the destruction of all those who dwell on Earth.

Setting

The year is 2087, and mankind has started expanding into outer space, founding colonies on the Moon and advancing dramatically in technology and generally improving the living conditions for everyone. However, a dark shadow is cast over this future, as the Moon colonies, under the leadership of Marshall Iskandar Guiltorre, declare themselves independent under the collective name of Giganos Empire.

After years of excalating tensions, brought on by the ever-growing discrimination against Earthlings on the Moon colonies, and by the construction of Giganos' Mass Driver, war finally breaks out, with Giganos Empire in an overwhelming advantage thanks to its technological superiority and the use of anthropomorphic Humongous Mecha called Metal Armors. A few months in the conflict, already 70% of Earth is under Giganos' dictatorship, and the Earth Federation is getting desperate...

Fortunately for the Federation, three new-model Metal Armors codenamed Dragonar are captured by an Allied fleet during transportation. Unfortunately, the Giganos forces immediately start pursuit, with the order of taking them back at all costs... and in the whole mess, the Dragonar end up being boarded and piloted by three teenagers from the neutral colony of Arcadia, which Giganos attacked to take back their prototypes.

Earth Federation Military

Ben Rooney	Lt. Diane Lance	Kaine Wakaba	Tapp Oceano	Light Newman

Linda Meio	Rose Patterson	Douglas	Aoi Wakaba

United Lunar Empire Gigano

Marshall Guiltorre	Lt. Colonel Dorchenov	Blue Hawk Meio Plato	Dan Krueger	Karl Geiner

Weiner Fritz

Gon Jem's Four Sky Kings

Gon Jem	Shitennou Ganan	Shitennou Gol	Shitennou Lee Sue Min	Shitennou Zin

Technology

Giganos Mass Driver: Mass drivers need no physical contact between moving parts because they guide their projectiles by dynamic magnetic levitation, allowing extreme reusability in the case of solid-state power switching, and a functional life of - theoretically - up to millions of launches. While marginal costs tend to be accordingly low, initial development and construction costs are highly dependent on performance, especially the intended mass, acceleration, and velocity of projectiles. For instance, while Gerard O'Neill built his first mass driver in 1976–1977 with a $2000 budget, a short test model firing a projectile at 40 m/s and 33 g, his next model had an order-of-magnitude greater acceleration after a comparable increase in funding, and, a few years later, researchers at the University of Texas estimated that a mass driver firing a 10 kilogram projectile at 6000 m/s would cost $47 million.

For a given amount of energy involved, heavier objects go proportionally slower. Light objects may be projected at 20 km/s or more. The limits are generally the expense of energy storage able to be discharged quickly enough and the cost of power switching, which may be by semiconductors or by gas-phase switches (which still often have a niche in extreme pulse power applications). However, energy can be stored inductively in superconducting coils. A 1 km long mass driver made of superconducting coils can accelerate a 20 kg vehicle to 10.5 km/s at a conversion efficiency of 80%, and average acceleration of 5,600 g.

Earth-based mass drivers for propelling vehicles to orbit, such as the StarTram concept, would require considerable capital investment.[10] The Earth's relatively strong gravity and relatively thick atmosphere make the implementation of a practical solution difficult. Also, most if not all plausible launch sites would propel spacecraft through heavily-traversed air routes. Due to the massive turbulence such launches would cause, significant air traffic control measures would be needed to ensure the safety of other aircraft operating in the area.

With the proliferation of reusable rockets to launch from Earth (especially first stages) whatever potential might have once existed for any economic advantage in using mass drivers as an alternative to chemical rockets to launch from Earth is becoming increasingly doubtful. For these reasons many proposals feature installing mass drivers on the Moon where the lower gravity and lack of atmosphere greatly reduce the required velocity to reach lunar orbit, also, lunar launches from a fixed position are much less likely to generate issues with respect to matters such as traffic control.

Most serious mass-driver designs use superconducting coils to achieve reasonable energetic efficiency (often 50% to 90+%, depending on design).[11] Equipment may include a superconducting bucket or aluminum coil as the payload. The coils of a mass driver can induce eddy currents in a payload's aluminum coil, and then act on the resulting magnetic field. There are two sections of a mass driver. The maximum acceleration part spaces the coils at constant distances, and synchronizes the coil currents to the bucket. In this section, the acceleration increases as the velocity increases, up to the maximum that the bucket can take. After that, the constant acceleration region begins. This region spaces the coils at increasing distances to give a fixed amount of velocity increase per unit of time.

Based on this mode, a major proposal for the use of mass drivers involved transporting lunar-surface material to space habitats for processing using solar energy.[12] The Space Studies Institute showed that this application was reasonably practical.

Metal Armors: War machines developed by the Giganos Lunar Empire to attack and take over the surface of the Earth, these are Earth-and-Space capable humanoid battle machines, like other mecha, who carry variable weapons and use different add-on parts to take various roles in battle. Metal Armors are the primary war machine of both the Earth Federation Military and the Giganos Lunar Empire in their war.

• Metal Armors