This paper model is a simple low poly Dropship, from the real-time tactics video game MechCommander 2 of the BattleTech/MechWarrior franchise, the papercraft is created by Vlmarshall. The size of finished model is about 179 (H) x 180 (W) x 180 (D) mm. There are 15 different versions available, and pre-skinned and CBT skinned versions are included.
In the BattleTech universe a DropShip is defined as any spaceship massing between 200 and 100,000 tons that is itself incapable of faster-than-light (FTL) travel. They essentially conduct all other aspects of space travel, including transit between planets and Jump Points and planetary landings. For FTL interstellar movement, they dock with JumpShips by means of a Docking collar.
The mass range is given in the construction rules and reflects the fact that it is more or less impossible to build DropShips which are smaller than 200 tons or larger than 100,000 tons. Since DropShips are meant to be carried by JumpShips, a Docking collar is an implied necessity and is automatically included in the structure of any DropShip.
DropShips are the workhorse of interplanetary space travel. It is the DropShips that move cargo and passengers between planetary surfaces, orbits, space stations and jump points. While transport is their primary role, some have been built for special purposes and act as tugs, rescue ships, fighter carriers or even designated combat DropShips. Accordingly, a wide and diverse variety of DropShip types exist.
Even though many DropShips serve as military spaceships, naval terms such as "Corvette", "Destroyer", "Cruiser" etc. are never applied to them; these are exclusively used for true WarShips, i.e. the huge Combat JumpShips that outclass DropShips by an order of magnitude. [Source: sarna]
You can download the papercraft model here: MechCommander 2 - Simple Dropship Free Paper Model Download