Lambda Keel

The Lambda Keel is a Lateral Limiter, meaning that it resists lateral forces acting on a ship. It is one of the few hyper-sophisticated Gold Age devices which remains not just popular but in widespread production capability (perhaps due to playing a very minor role in the events of the Collapse). The Lambda Keel, sometimes known as the L-Keel or Double Lambda, is a long cylinder containing an intricate array of electromagnetically primed coils of microscopic fibre, orientated so that the coils wrap along the ship’s bank (roll) axis. Once set up, the Lambda resists lateral momentum; converting the energy into longitudinal thrust down the beam by the shortest angle. As such, it is essential kit for a Sailer. The propulsive force derived is equal to half the magnitude of the pushing force (ie. the wind), multiplied by the angle from the perpendicular of the bank axis in radians (angle from directly side-on).

Because L-Keels do not require power once created (aside from occasional alignment maintenance), they are an attractive prospect for privateers, civilians, hobbyists and pirates.

See also: Delta Keel