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Gokstad ship

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The Gokstad ship
Gokstad ship.jpg
Type Viking longship, karvi
Manufacturer Unknown Norwegian shipwright
Author(s) Anders Gidenstam
FDM JSBSim
--aircraft= Gokstad
Status Alpha
 FDM Stars-1.png
 Systems Stars-0.png
 Cockpit Stars-0.png
 Model Stars-1.png
Development
 Website The website for the The Gokstad ship developments.
 Repository The development repository of the The Gokstad ship.
Download Download the The Gokstad ship aircraft package for the current stable release (2018.3).
License GPLv2+

The Gokstad ship is a karvi, a small type of Viking longship. It is a 24 meter long open clinker-built hull constructed from oak and was built some time around 900 AD. Some time after, maybe about 950 - 1000 AD, it was placed as grave furniture in and below a large burial mound near the Gokstad farm in southern Norway. The ship was rediscovered in 1880 when the mound was excavated by archaeologists. The clay soil had preserved most of the hull, but the exact nature of the rigging for the single large mast, generally believed to have carried a single large square sail below a single yard, is somewhat unclear.

Handling and controls

Sail

The modelling of the rigging is in a very early state. The following controls are available for the sail:

The throttle axis (PgUp, PgDn) controls the amount of reefing. The aileron axis (, ) controls the bracing of the yard, i.e. turns the sail.

The weather vane is a useful tool to trim the sail.

Rudder

The rudder is controlled by the standard rudder input, keypad '0' and ',' or any rudder axis connected.

Installation and Dependencies

This "aircraft" depends on resources from some other aircraft. Install a matching version of these too.

Known problems

  • The hydrodynamics planing model may react poorly to non-smooth water surfaces (in the terrain mesh, not waves) which is not that uncommon in FlightGear's terrain.
  • The hydrodynamics planing model requires a significantly increased FDM rate (the /sim/model-hz property) for good simulation results. On some systems this appears to have a considerable impact on the frame rate.