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Howto:Modelling hydrodynamics in JSBSim: Difference between revisions
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Howto:Modelling hydrodynamics in JSBSim (view source)
Revision as of 21:59, 6 December 2016
, 6 December 2016→Modelling hydrodynamic coefficients
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The third component of the drag is due to planing. The planing force and moments are computed by the generic [https://sourceforge.net/p/flightgear/fgdata/ci/next/tree/Aircraft/Generic/JSBSim/Systems/hydrodynamic-planing.xml hydrodynamic-planing.xml] system. The system is based on a (simple) model of planing described in (H. Wagner, "Planing of Watercraft", 1933, translated from German as NACA-TM-1139 in 1948) which models the normal force created by a flat planing surface. | The third component of the drag is due to planing. The planing force and moments are computed by the generic [https://sourceforge.net/p/flightgear/fgdata/ci/next/tree/Aircraft/Generic/JSBSim/Systems/hydrodynamic-planing.xml hydrodynamic-planing.xml] system. The system is based on a (simple) model of planing described in (H. Wagner, "Planing of Watercraft", 1933, translated from German as NACA-TM-1139 in 1948) which models the normal force created by a flat planing surface. | ||
The system is set up by providing geometric information about the location of the planing surfaces (assumed to be 3) in the hydro RP frame and two tuning parameters per surface, a scaling factor for the normal force and an additional skin friction coefficient (per ft^2 of | The system is set up by providing geometric information about the location of the planing surfaces (assumed to be 3) in the hydro RP frame and two tuning parameters per surface, a scaling factor for the normal force and an additional skin friction coefficient (per ft^2 of planing surface below the undisturbed water line). | ||
<syntaxhighlight lang="xml"> | <syntaxhighlight lang="xml"> | ||
<system file="hydrodynamic-planing"> | <system file="hydrodynamic-planing"> | ||