Landing Gear
Landing Gear is designed to facilitate surface landings.
- It is intrinsic item of Ship equipment.
Description / Specifications
Landing gear is the undercarriage of a spacecraft or other aerial vehicle and may be used for either takeoff or landing.
- Landing gear is either fixed or retractible.
- Retractible landing gear is housed within a compartment in the hull known as a well. On some designs, the well may be accessed by a hatch or removable panel. The well is typically covered by a door when the undercarriage is retracted.
Landing gear supports the weight of the hull.
- Due to their large size and mass and the high ground pressures that they generate, vessels will generally land on a prepared landing surface such as a runway or a landing pad, or on solid bedrock. Landings on other surfaces are of course possible, but such operations are hazardous (the surface may slip or give way, or the vessel may sink). This risks damage to the vessel and possible local civic outrage.
Types
A wide variety of landing gear is utilized but can generally be categorized into one of three types:
(1) Landing Skids
Landing skids are most commonly horizontal bars that transmit the weight of the ship to the surface on which it is resting. The surface should be level; the skids have no inherent leveling capability. The bars do not actually “skid” and the ship is immobile when landed.
- Fixed landing legs and landing wheels are a form of landing skid: a familiar example is the ubiquitous 800-Ton Broadsword class Mercenary Cruiser
- Some vessels may dispense with landing gear altogether, instead utilizing the ventral surfaces of the hull directly. Such designs generally have contoured surfaces with designated contact points. These contact points (pads)are usually proud of the main part of the hull and are specially hardened and reinforced.
- Early designs of space capsule generally rely on drogue parachutes and hardened ventral surfaces to achieve surface landings.
- In very cold environments, where there may be large bodies of ices and frozen volatiles, some vessels may utilize skis for takeoffs and landings.
(2) Landing Legs
The ship has landing legs ending in pads (or occasionally articulated mechanical feet or claws). The pads may rest on any reasonably stable, relatively level surface: the legs contain mechanical components that adjust to compensate for uneven terrain. The ship is immobile when landed. Landing legs are retractable.
(3) Landing Wheels
The ship has landing legs terminating in wheels. The wheels are retractable. The hull may land anywhere that Landing legs with pads can, but for the wheels to be able to roll, a landing strip or a surface such as a metalled highway is required. Most wheeled undercarriages contain shock absorbers and braking equipment. Some wheeled undercarriages may be powered.
- Some undercarriages utilize a tracked suspension rather than wheels. The ship must take off and land in the same manner as a vessel with landing legs, while on the surface it is able to move in a similar manner to a vessel with a wheeled undercarriage.
Hull Cradles
The configuration of some hulls, despite their being fully streamlined and capable of atmospheric operations, may not be practical for surface landings. In such circumstances they may generally only land through the use of a cradle configured to the shape of their hull.
- Hull cradles are typically fixed mechanical assemblies within starport docking bays. They most commonly consist of powerful grappling arms and docking tubes that are able to safely support the hull. They can accommodate almost any shape of hull.
- A hull cradle may be specific to a particular design of hull. Vessels with a different hull shape cannot generally utilize the cradle.
- One or more vehicles mounting grappling arms may position themselves around the vessel, serving as a mobile cradle and acting to support the vessel while it is landed. Such vehicles may be robots and are frequently very large.
- Some hull cradles utilize gravitic technology such as repulsors.
Flotation Devices
Some vehicles and aircraft have flotation landing gear, commonly called floats, that allow landings on fluid surfaces, most typically bodies of liquid water.
- Floats are often hybrid devices, containing wheels to allow takeoffs and landings on landing strips.
- Many classes of starships are naturally buoyant and will float. However, unless they are designed for maritime operations exposure to an aquatic environment may present considerable risk.
Gravitic Systems
Some vessels have powerful onboard gravitic technology enabling them to float in place, forgoing the need for landing gear altogether.
History & Background (Dossier)
Landing gear of some kind is a fundamental requirement for most aircraft and aerial vehicles and is intrinsic to many types of spacecraft.
References & Contributors (Sources)
- T5 Core Rules, Far Future Enterprises 2013, multiple references.
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science