Jumpships consists of a bulbous bridge and living quarters section at the front, a spinal section housing dropship docking rings and a capacitor bank, and the engineering section, which houses the Kearny-Fuchida FTL drive (KF Drive) and the fusion engine. In order to generate the enormous amount of power the K-F drive needs to execute an FTL jump, the jumpship deploys a thin metallic solar array, known as a "jump sail." The jump sail is only about a millimeter thick, but can have a diameter of several kilometers. During a jump, the sail is retracted and stored in the engineering section. The crew section usually has at least one spinning centrifuge used to create artificial gravity, referred to as a "gravity deck" or "grav deck" for short. Larger jumpships also sometimes carry hydroponic gardens in domes attached to the crew section.
The K-F drive's maximum jump range is approximately 30 light years. Generally, jumpships arrive in a solar system at the very edge of a star's gravitational influence, directly above one of the star's two poles, the nexus point to solar north and the nadir point to solar south. A skilled navigator can also enter a system at a "pirate point", much closer to the system's planets. Due to the complexity of calculating pirate points, this can be a dangerous procedure, but one which offers an invading fleet a greater chance to catch a system's defenders by surprise.
Because they only carry station-keeping drives, jumpships rely on dropships to ferry cargo between the jumpship and planets within a system. The number of dropship docking rings a jumpship has varies from one to nine, depending on the size of the jumpship. Depending on the size of a system, the time needed for a trip from a jump point to the system's habitable zone can be anywhere from a few days to a month .
Typically, during this "turn-around" time, a jumpship will deploy its jump sail to recharge its K-F drive using the local system's star. Some more advanced jumpships carry lithium-fusion batteries which can store an extra charge for the K-F drive, allowing a jumpship to either make a round-trip between two systems without recharging or make two FTL jumps in rapid succession, effectively extending the ship's range to 60 light years. Unfortunately, recharging the lithium fusion battery doubles the amount of recharge time a jumpship requires, limiting its flexibility somewhat.
The Succession Wars created a shortage of jumpships in the Inner Sphere, directly threatening the backbone of interstellar transportation. During the 1st and 2nd Succession Wars, most of the orbital construction facilities used to build jumpships were destroyed, and the fragile, slow, poorly armored jumpships were vulnerable targets.
Because of the difficulty of constructing new jumpships to replace those lost in combat, and the important role they play in holding interstellar civilization together, the powers of the Inner Sphere came to regard Jumpships as lostech (technology that is no longer fully understood and which is no longer able to produced) as the Succession Wars dragged on. This meant that they were protected by the code of combat which gradually arose to protect the Inner Sphere's fragile technology base, and generally regarded as off limits during combat. This protection has some limits. While destruction of a jumpship in combat is frowned upon, boarding actions and weapons fire directed at the solar sail with the intention of immobilizing a jumpship is permitted under the informal rules of warfare in the Inner Sphere in the 31st century.
- ↑ Jumpships and Dropships. FASA, 1988.
- ↑ BattleSpace. FASA, 1993.
- ↑ BattleSpace. FASA, 1993. Technical Readout 3057: Jumpships, Dropships, and Warships. FASA, 1994.
- ↑ 4.0 4.1 Battlespace
- 1. Jumpships and Dropships. FASA, 1988.,
- 2. BattleSpace. FASA, 1993.
- 3. Technical Readout 3057: Jumpships, Dropships, and Warships. FASA, 1994.
- 4. Aerotech 2 Revised - FanPro, 2004
- 5. Technical Readout: 3057 Revised - FanPro, 2004
- 6. Technical Readout: 3067 - FanPro, 2004
- 7. Technical Readout: 3075 - Catalyst Game Lab, 2008
- JumpShip article at BattleTechWiki
- Chaos March BattleTech Archive - Fan Supported site that lists Aerotech ships (Jumpships, Warships & other vehicles in listings)
- Table of Contents from 3057 Revised