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fgdata/Aircraft/c172p/Systems/c172p-hydrodynamics.xml

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Initial checking of c172p-detailed. From https://github.com/Juanvvc/c172p-detailed.git Commit df6b2c5f4f75d000c5f5ef9c6cc4446784348f20
2015-06-16 21:20:54 +00:00
<?xml version="1.0"?>
<!--
c172p on floats hydrodynamics model for JSBSim.
Copyright (C) 2015 Anders Gidenstam (anders(at)gidenstam.org)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-->
<system name="c172p hydrodynamics">
<property value="0">floats-enabled-norm</property>
<!-- Model parameters -->
<!-- HRP location -->
<!-- NOTE: The HRP has been moved forward by 10 in to improve the
static/idling attitude.
-->
<property value="32.6">metrics/hydro-rp-x-in</property>
<property value="0.0">metrics/hydro-rp-y-in</property>
<property value="38.5">metrics/hydro-rp-z-in</property>
<property value="9.8">metrics/hydro-beam-ft</property>
<property value="18.3">metrics/hydro-length-ft</property>
<documentation>
The extreme float beam is used as the reference length and to define both
reference area and volume.
</documentation>
<property value="2.71">hydro/float-beam-ft</property>
<property value="7.34">hydro/float-beam-ft2</property>
<property value="19.90">hydro/float-beam-ft3</property>
<property value="53.94">hydro/float-beam-ft4</property>
<property value="18.3">hydro/hull-length-ft</property>
<!-- Tweak factors. :) -->
<property value="1.0">hydro/drag-tweak-factor</property>
<property value="1.0">hydro/side-tweak-factor</property>
<property value="1.0">hydro/lift-tweak-factor</property>
<property value="1.0">hydro/pitch-tweak-factor</property>
<property value="1.0">hydro/yaw-tweak-factor</property>
<property value="1.0">hydro/yaw-stability-tweak-factor</property>
<!-- The bx and by channels of the body frame are not used. -->
<property value="0.0">hydro/fbx-lbs</property>
<property value="0.0">hydro/fby-lbs</property>
<channel name="Enable/disable">
<fcs_function name="hydro/active-norm">
<description>
A property that is 0 when no part of the hull is in the water.
The maximum value is 1.
</description>
<function>
<product>
<property>floats-enabled-norm</property>
<value>0.001</value>
<lt>
<value>-100.0</value>
<property>hydro/float/roll-deg</property>
</lt>
<lt>
<property>hydro/float/roll-deg</property>
<value>100.0</value>
</lt>
<sum>
<property>hydro/buoyancy-lbs</property>
<property>hydro/planing-lift-lbs</property>
</sum>
</product>
</function>
<clipto>
<min>0.0</min>
<max>1.0</max>
</clipto>
</fcs_function>
<fcs_function name="hydro/spray-wake-speed-kt">
<function>
<product>
<not>
<property>/fdm/jsbsim/ground/solid</property>
</not>
<gt>
<property>hydro/active-norm</property>
<value>0.0</value>
</gt>
<property>/velocities/groundspeed-kt</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/left-ground-effect-speed-kt">
<function>
<product>
<or>
<property>/fdm/jsbsim/contact/unit[13]/WOW</property>
<property>/fdm/jsbsim/contact/unit[15]/WOW</property>
<property>/fdm/jsbsim/contact/unit[17]/WOW</property>
</or>
<property>/velocities/groundspeed-kt</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/right-ground-effect-speed-kt">
<function>
<product>
<or>
<property>/fdm/jsbsim/contact/unit[14]/WOW</property>
<property>/fdm/jsbsim/contact/unit[16]/WOW</property>
<property>/fdm/jsbsim/contact/unit[18]/WOW</property>
</or>
<property>/velocities/groundspeed-kt</property>
</product>
</function>
</fcs_function>
</channel>
<channel name="Common coefficients">
<fcs_function name="hydro/speed-length-ratio">
<function>
<quotient>
<product> <!-- Speed in knots. -->
<value>0.5924838</value>
<property>hydro/vbx-fps</property>
</product>
<pow>
<property>hydro/hull-length-ft</property>
<value>0.5</value>
</pow>
</quotient>
</function>
</fcs_function>
<fcs_function name="hydro/Frode-number">
<function>
<quotient>
<property>hydro/vbx-fps</property>
<pow>
<product>
<property>hydro/environment/gravity-ft_sec2</property>
<property>hydro/hull-length-ft</property>
</product>
<value>0.5</value>
</pow>
</quotient>
</function>
</fcs_function>
</channel>
<channel name="Displacement wave making">
<fcs_function name="hydro/transverse-wave/wave-length-ft">
<description>The wave length of the transverse wave</description>
<function>
<product>
<quotient>
<value>6.2831853</value>
<property>hydro/environment/gravity-ft_sec2</property>
</quotient>
<property>hydro/vbx-fps</property>
<property>hydro/vbx-fps</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/transverse-wave/wave-amplitude-ft">
<description>The amplitude of the transverse wave. Guessed.</description>
<function>
<product>
<value>1.0</value>
<table>
<independentVar lookup="row">hydro/speed-length-ratio</independentVar>
<tableData>
0.0 1.0
1.3 1.0
2.0 0.6
2.5 0.0
</tableData>
</table>
<pow>
<quotient>
<product>
<value>2.0</value>
<property>hydro/displacement-drag-lbs</property>
<property>hydro/transverse-wave/wave-length-ft</property>
</product>
<product>
<value>3.1415927</value>
<property>hydro/environment/rho-slug_ft3</property>
<property>hydro/environment/gravity-ft_sec2</property>
<max>
<value>0.0001</value>
<property>hydro/vbx-fps</property>
</max>
</product>
</quotient>
<value>0.5</value>
</pow>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/transverse-wave/squat-ft">
<description>
The average water level change by the transverse wave
</description>
<function>
<!-- The integral of the sine wave evaluated at the stern. -->
<quotient>
<product>
<value>0.15915494</value>
<property>hydro/transverse-wave/wave-amplitude-ft</property>
<property>hydro/transverse-wave/wave-length-ft</property>
<sin>
<quotient>
<product>
<value>6.2831853</value>
<property>hydro/hull-length-ft</property>
</product>
<property>hydro/transverse-wave/wave-length-ft</property>
</quotient>
</sin>
</product>
<property>hydro/hull-length-ft</property>
</quotient>
</function>
</fcs_function>
<fcs_function name="hydro/transverse-wave/pitch-trim-change-deg">
<description>
The pitch trim change due to the transverse wave. Guessed.
</description>
<!-- deltaTrim = atan2(water line at bow - water line at stern, LWL) -->
<function>
<product>
<value>57.29578</value>
<table>
<independentVar lookup="row">hydro/speed-length-ratio</independentVar>
<tableData>
0.0 0.0
1.2 0.0
1.3 1.0
</tableData>
</table>
<atan2>
<difference>
<property>hydro/transverse-wave/wave-amplitude-ft</property>
<product>
<property>hydro/transverse-wave/wave-amplitude-ft</property>
<sin>
<quotient>
<product>
<value>6.2831853</value>
<property>hydro/hull-length-ft</property>
</product>
<property>hydro/transverse-wave/wave-length-ft</property>
</quotient>
</sin>
</product>
</difference>
<property>hydro/hull-length-ft</property>
</atan2>
</product>
</function>
</fcs_function>
</channel>
<channel name="Effective floats position and orientation">
<fcs_function name="hydro/float/height-agl-ft">
<description>
The float height with waves and squat due to the transverse wave applied.
</description>
<function>
<sum>
<property>hydro/height-agl-ft</property>
<!-- Account for the 6.5cm vertical offset of the float model. -->
<value>-0.2133</value>
<product>
<value>-1.0</value>
<table>
<independentVar lookup="row">hydro/environment/wave-length-ft</independentVar>
<tableData>
0.0 0.0
100.0 1.0
</tableData>
</table>
<max>
<value>-100.0</value>
<min>
<property>hydro/environment/wave/level-at-hrp-ft</property>
<!-- property>hydro/environment/wave/level-change-ft</property -->
<value>100.0</value>
</min>
</max>
</product>
<!-- Squat is disabled as it currently misbehaves in near at rest
conditions leading to strange bobbing on the water.
-->
<max>
<value>-0.0</value>
<min>
<property>hydro/transverse-wave/squat-ft</property>
<value>0.0</value>
</min>
</max>
</sum>
</function>
</fcs_function>
<fcs_function name="hydro/float/pitch-deg">
<description>
The float pitch with the trim change due to waves and
the displacement wave applied.
</description>
<function>
<sum>
<value>-3.0</value> <!-- The float model is 3 deg offset in pitch. -->
<property>hydro/pitch-deg</property>
<product>
<value>1.0</value>
<max>
<value>-30.0</value>
<min>
<property>hydro/orientation/wave-pitch-trim-change-deg</property>
<value>30.0</value>
</min>
</max>
</product>
<product>
<value>-1.0</value>
<max>
<value>-30.0</value>
<min>
<property>hydro/transverse-wave/pitch-trim-change-deg</property>
<value>30.0</value>
</min>
</max>
</product>
</sum>
</function>
</fcs_function>
<fcs_function name="hydro/float/pitch-rad">
<description>
The float pitch with the trim change due to waves and
the displacement wave applied.
</description>
<function>
<product>
<value>0.017453293</value>
<property>hydro/float/pitch-deg</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/float/roll-deg">
<description>
The float roll with the trim change due to waves applied.
</description>
<function>
<sum>
<property>hydro/roll-deg</property>
<product>
<value>1.0</value>
<max>
<value>-50.0</value>
<min>
<property>hydro/orientation/wave-roll-trim-change-deg</property>
<value>50.0</value>
</min>
</max>
</product>
</sum>
</function>
</fcs_function>
</channel>
<channel name="Drag">
<fcs_function name="hydro/displacement-drag-lbs">
<function>
<description>Drag due to displacement of float</description>
<product>
<value>0.0150</value> <!-- Base Cd. -->
<property>hydro/qbar-psf</property>
<property>hydro/float-beam-ft2</property>
<property>hydro/drag-tweak-factor</property>
<min>
<quotient> <!-- Reduce when planing. Needs refinement. -->
<property>hydro/buoyancy-lbs</property>
<property>inertia/weight-lbs</property>
</quotient>
<value>1.0</value>
</min>
<sum>
<value>1.0</value>
<product> <!-- Increase drag with beta. -->
<value>10.0</value>
<abs><sin><property>hydro/beta-rad</property></sin></abs>
</product>
</sum>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/planing-drag-lbs">
<function>
<description>Drag due to planing</description> <!-- Guess -->
<product>
<value>1.0</value>
<!-- Assumption: Lift ~ sin(2*pitch) and Drag ~ 1+sin(2*pitch-pi/2). -->
<quotient>
<sum>
<value>1.0</value>
<sin>
<sum>
<product>
<value>2.0</value>
<abs><property>hydro/float/pitch-rad</property></abs>
</product>
<value>-1.5707963</value>
</sum>
</sin>
</sum>
<sin>
<product>
<value>2.0</value>
<abs><property>hydro/float/pitch-rad</property></abs>
</product>
</sin>
</quotient>
<property>hydro/planing-lift-lbs</property>
<sum>
<value>1.0</value>
<product> <!-- Increase drag with beta. -->
<value>10.0</value>
<abs><sin><property>hydro/beta-rad</property></sin></abs>
</product>
</sum>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/fdrag-lbs">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/displacement-drag-lbs</property>
<property>hydro/planing-drag-lbs</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
<channel name="Side">
<fcs_function name="hydro/floats-side-lbs">
<function>
<description>Side force due to floats. Guessed.</description>
<product>
<value>-1.0</value>
<property>hydro/qbar-u-psf</property>
<property>hydro/float-beam-ft2</property>
<property>hydro/side-tweak-factor</property>
<sin><property>hydro/beta-rad</property></sin>
<value>0.20</value>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/fside-lbs">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/floats-side-lbs</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
<channel name="Lift / Body-Z (up)">
<fcs_function name="hydro/buoyancy-lbs">
<documentation>
Lift due to buoyancy.
This data was computed in Gerris using the 3d model.
</documentation>
<function>
<product>
<value>1.0</value>
<property>hydro/environment/rho-slug_ft3</property>
<property>hydro/environment/gravity-ft_sec2</property>
<table>
<independentVar lookup="row">hydro/float/pitch-deg</independentVar>
<independentVar lookup="column">hydro/float/roll-deg</independentVar>
<independentVar lookup="table">hydro/float/height-agl-ft</independentVar>
<tableData breakPoint="4.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 70.4697 71.9988 72.6889 73.8903 72.6889 71.9985 70.4697
-4 77.7445 82.0522 78.1528 78.5465 78.1528 82.0522 77.7445
-2 79.8715 80.4772 79.3203 77.6527 79.3203 80.4772 79.8715
0 80.7664 75.3661 74.6665 74.2406 74.6665 75.3661 80.7664
2 75.1609 75.7221 73.7974 73.713 73.7974 75.7221 75.1609
4 75.5398 74.7205 74.4984 73.9648 74.4984 74.7205 75.5398
8 77.0679 76.9104 75.6214 75.2767 75.6214 76.91 77.0679
12 75.4109 77.2332 77.7152 77.314 77.7152 77.2332 75.4109
</tableData>
<tableData breakPoint="5.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 52.3 53.9739 54.1208 54.0187 54.1208 53.9739 52.3
-4 60.7186 60.7677 61.0089 59.8358 61.0089 60.7677 60.7186
-2 61.0142 65.455 64.8822 63.3651 64.8822 65.455 61.0142
0 64.4655 69.4184 69.2535 70.1272 69.2535 69.4184 64.4655
2 66.1084 70.8649 73.2868 74.539 73.2868 70.8649 66.1084
4 67.2642 71.9501 71.5609 70.7939 71.5609 71.9501 67.2642
8 67.3543 70.094 69.5642 69.6335 69.5642 70.094 67.3543
12 63.2775 64.2165 64.9451 63.9354 64.9451 64.2165 63.2775
</tableData>
<tableData breakPoint="6.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 25.4825 26.9554 25.9179 24.5584 25.9179 26.9554 25.4825
-4 24.0267 23.3142 24.1937 22.4124 24.1937 23.3142 24.0267
-2 24.21 24.1405 22.0957 20.8603 22.0957 24.1405 24.21
0 24.4535 22.0509 20.8428 20.7541 20.8428 22.0509 24.4536
2 28.0905 22.5761 21.5485 21.271 21.5485 22.5761 28.0906
4 27.3417 26.1271 23.9223 25.0481 23.9223 26.127 27.3432
8 32.7235 33.5893 33.8572 33.1867 33.8572 33.5893 32.7234
12 37.0016 38.9945 39.4426 38.374 39.4426 38.9945 37.0016
</tableData>
<tableData breakPoint="7.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 6.25045 2.68815 1.66639 1.27294 1.66639 2.68652 6.25045
-4 3.56943 1.02463 0.446949 0.269098 0.446957 1.02463 3.56947
-2 2.81221 0.626676 0.26499 0.183048 0.264992 0.62668 2.81222
0 2.13289 0.420421 0.183404 0.166645 0.183405 0.420425 2.13288
2 1.98427 0.350449 0.155825 0.171879 0.155826 0.350451 1.98427
4 2.17672 0.384672 0.199169 0.16473 0.199169 0.384676 2.17672
8 5.4849 1.17043 0.390792 0.226396 0.390796 1.17044 5.48479
12 11.1033 7.5258 6.05007 5.45615 6.05007 7.5258 11.1033
</tableData>
<tableData breakPoint="8.0">
-8 -4 -2 0 2 4 8
-8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 0.0 0.0 0.0 0.0 0.0 0.0 0.0
</tableData>
</table>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/planing-lift-lbs">
<documentation>
Lift due to planing. Guessed.
</documentation>
<function> <!-- Guess -->
<max>
<value>0.0</value>
<product>
<value>0.0100</value>
<property>hydro/qbar-u-psf</property>
<property>hydro/buoyancy-lbs</property>
<sin>
<product>
<value>2.0</value>
<property>hydro/float/pitch-rad</property>
</product>
</sin>
</product>
</max>
</function>
</fcs_function>
<fcs_function name="hydro/damping-lift-lbs">
<function>
<product>
<value>1.0</value>
<value>125.0</value> <!-- Guess -->
<property>velocities/v-down-fps</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/fbz-lbs">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/buoyancy-lbs</property>
<property>hydro/planing-lift-lbs</property>
<property>hydro/damping-lift-lbs</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
<channel name="Yaw">
<fcs_function name="hydro/float-yaw-moment-lbsft">
<documentation>
Guessestimated course restoring moment.
</documentation>
<function>
<description>Yaw moment due to float (per radian beta)</description>
<product>
<value>1.0</value>
<property>hydro/yaw-stability-tweak-factor</property>
<property>hydro/qbar-u-psf</property>
<property>hydro/float-beam-ft3</property>
<sin><property>hydro/beta-rad</property></sin>
<value>0.125</value> <!-- FIXME? Does beta have the right sign? -->
</product>
</function>
</fcs_function>
<fcs_function name="hydro/rudder-yaw-moment-lbsft">
<documentation>
Guessestimated yaw moment due to water rudder.
</documentation>
<function>
<description>Hydrodynamic yaw moment due to rudder</description>
<product>
<property>/controls/gear/water-rudder-down</property>
<property>hydro/qbar-u-psf</property>
<property>hydro/float-beam-ft3</property>
<property>fcs/rudder-pos-norm</property>
<value>-0.025</value>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/damping-yaw-moment-lbsft">
<documentation>
Dampen yaw movements while in the water. Guessed.
</documentation>
<function>
<product>
<value>1.0</value>
<value>-2000.0</value> <!-- Guess -->
<property>hydro/yaw-tweak-factor</property>
<property>velocities/psidot-rad_sec</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/yaw-moment-lbsft">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/float-yaw-moment-lbsft</property>
<property>hydro/rudder-yaw-moment-lbsft</property>
<property>hydro/damping-yaw-moment-lbsft</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
<channel name="Pitch">
<fcs_function name="hydro/buoyancy-pitch-moment-lbsft">
<documentation>
Pitch moment due to buoyancy.
This data was computed in Gerris using the 3d model.
</documentation>
<function>
<product>
<value>1.0</value>
<property>hydro/environment/rho-slug_ft3</property>
<property>hydro/environment/gravity-ft_sec2</property>
<table>
<independentVar lookup="row">hydro/float/pitch-deg</independentVar>
<independentVar lookup="column">hydro/float/roll-deg</independentVar>
<independentVar lookup="table">hydro/float/height-agl-ft</independentVar>
<tableData breakPoint="4.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 -49.8934 -52.6368 -53.7658 -56.1033 -53.766 -52.6365 -49.8936
-4 -80.7443 -102.053 -99.3077 -102.284 -99.3077 -102.052 -80.7444
-2 -92.4784 -105.592 -107.941 -105.992 -107.941 -105.592 -92.4782
0 -102.174 -94.6973 -91.698 -91.5532 -91.698 -94.6973 -102.174
2 -85.781 -86.6013 -83.744 -84.3092 -83.744 -86.6013 -85.781
4 -76.4024 -75.1258 -76.4317 -79.8259 -76.4318 -75.1257 -76.4025
8 -76.0785 -66.8813 -62.4486 -61.0493 -62.4486 -66.8812 -76.0788
12 -70.4194 -64.056 -62.4022 -61.8628 -62.4022 -64.0561 -70.4196
</tableData>
<tableData breakPoint="5.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 33.4887 42.7619 44.8523 45.2644 44.8523 42.7618 33.4887
-4 2.43921 17.0136 20.9835 22.6711 20.9835 17.0137 2.43937
-2 -22.1875 -9.67182 -3.89045 -0.853817 -3.89048 -9.67178 -22.1875
0 -48.2256 -44.745 -42.5473 -43.7305 -42.5471 -44.7452 -48.2257
2 -68.4349 -80.8253 -85.0642 -87.2098 -85.0641 -80.8253 -68.435
4 -89.499 -105.483 -109.071 -109.978 -109.071 -105.483 -89.499
8 -121.571 -127.118 -126.238 -126.398 -126.238 -127.118 -121.571
12 -128.174 -131.081 -132.757 -130.413 -132.757 -131.081 -128.174
</tableData>
<tableData breakPoint="6.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 48.9994 60.7321 61.0332 59.1263 61.0332 60.732 48.9993
-4 30.9213 38.3046 41.7565 39.5816 41.7565 38.3046 30.9214
-2 19.2704 28.0892 28.0822 27.1484 28.0822 28.0892 19.2704
0 3.57206 12.2632 14.1529 14.8735 14.1529 12.2632 3.57202
2 -21.2887 -6.2624 -2.26959 -0.916582 -2.26962 -6.26242 -21.2887
4 -44.7696 -37.2403 -30.0576 -29.7852 -30.0576 -37.2399 -44.7787
8 -95.0674 -116.215 -121.7 -120.712 -121.7 -116.215 -95.0672
12 -140.104 -161.546 -166.883 -163.78 -166.883 -161.546 -140.104
</tableData>
<tableData breakPoint="7.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 19.4398 8.78683 5.33896 3.89086 5.33897 8.7802 19.4398
-4 8.0711 2.34596 0.687956 0.19446 0.68797 2.34597 8.07113
-2 4.75018 0.970148 0.0744521 -0.143791 0.0744605 0.970156 4.75019
0 1.96616 0.183646 -0.142763 -0.182171 -0.14276 0.183652 1.96635
2 0.162832 -0.150639 -0.188178 -0.218317 -0.188178 -0.150631 0.162831
4 -1.86948 -0.45569 -0.283048 -0.234038 -0.283047 -0.455692 -1.86949
8 -23.9856 -4.26476 -1.01733 -0.45322 -1.01735 -4.2648 -23.9848
12 -64.3624 -51.9159 -45.7478 -42.8309 -45.7478 -51.9159 -64.3625
</tableData>
<tableData breakPoint="8.0">
-8 -4 -2 0 2 4 8
-8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 0.0 0.0 0.0 0.0 0.0 0.0 0.0
</tableData>
</table>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/planing-pitch-moment-lbsft">
<documentation>
Pitch moment due to planing. Guessed.
</documentation>
<function>
<product>
<value>0.01</value>
<property>hydro/qbar-u-psf</property>
<property>hydro/buoyancy-pitch-moment-lbsft</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/damping-pitch-moment-lbsft">
<function>
<product>
<value>1.0</value>
<value>-12000.0</value> <!-- Guess -->
<property>velocities/thetadot-rad_sec</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/pitch-moment-lbsft">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/buoyancy-pitch-moment-lbsft</property>
<property>hydro/planing-pitch-moment-lbsft</property>
<!-- Numerical failure on startup? Try reducing pitch damping first. -->
<property>hydro/damping-pitch-moment-lbsft</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
<channel name="Roll">
<fcs_function name="hydro/buoyancy-roll-moment-lbsft">
<documentation>
Roll moment due to buoyancy.
This data was computed in Gerris using the 3d model.
</documentation>
<function>
<product>
<value>1.0</value>
<property>hydro/environment/rho-slug_ft3</property>
<property>hydro/environment/gravity-ft_sec2</property>
<table>
<independentVar lookup="row">hydro/float/pitch-deg</independentVar>
<independentVar lookup="column">hydro/float/roll-deg</independentVar>
<independentVar lookup="table">hydro/float/height-agl-ft</independentVar>
<tableData breakPoint="4.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 8.72367 3.4119 1.51942 -3.96596e-05 -1.51953 -3.41223 -8.72358
-4 -5.83223 -3.93577 -2.91107 -0.000262513 2.91107 3.9358 5.83257
-2 -17.6198 -11.69 -6.55986 -0.000206154 6.55992 11.6901 17.6198
0 -28.7458 -14.424 -6.41822 -0.000296678 6.4183 14.4241 28.7458
2 -34.7317 -13.1807 -2.43002 -0.000283589 2.4301 13.1808 34.7317
4 -29.6613 -13.7711 -7.79658 -0.000262128 7.79648 13.7712 29.6618
8 -22.0225 -12.6664 -6.95697 -1.43722e-05 6.95702 12.6664 22.0223
12 -11.6461 -7.07278 -3.19646 -3.8768e-05 3.19645 7.07265 11.6463
</tableData>
<tableData breakPoint="5.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 41.7095 21.3349 10.7468 -1.23669e-05 -10.7468 -21.3349 -41.7097
-4 58.1077 29.4764 15.0887 -0.000207035 -15.0888 -29.4765 -58.1078
-2 65.6045 35.3532 17.9802 -3.10252e-06 -17.9804 -35.3534 -65.6045
0 69.6288 39.5229 20.3001 5.04923e-05 -20.3004 -39.5261 -69.6288
2 65.0925 37.8059 19.1963 1.20412e-05 -19.1964 -37.806 -65.0925
4 56.2429 31.1272 16.1416 -6.82378e-06 -16.1415 -31.1273 -56.243
8 41.3347 20.6953 10.6429 -7.48679e-05 -10.6429 -20.6955 -41.3348
12 32.9876 16.7757 8.8982 -5.18437e-05 -8.89822 -16.7759 -32.9877
</tableData>
<tableData breakPoint="6.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 59.9977 32.4897 16.1373 -9.38677e-05 -16.1375 -32.4898 -59.9979
-4 70.4555 37.779 19.3986 -0.000217243 -19.3987 -37.7792 -70.4555
-2 75.9963 42.6932 20.4349 -9.6388e-05 -20.435 -42.6933 -75.9964
0 80.5515 43.7846 21.2748 -0.000103545 -21.2749 -43.7847 -80.5516
2 94.1445 47.7392 23.8101 -0.000197113 -23.8102 -47.7393 -94.1445
4 92.4242 55.9008 27.5434 -0.000446517 -27.5435 -55.9005 -92.428
8 92.8873 49.2672 24.9231 -0.000181934 -24.9233 -49.2673 -92.8874
12 65.3364 33.9039 16.95 -0.000132855 -16.9501 -33.9039 -65.3364
</tableData>
<tableData breakPoint="7.0">
-8.0 -4.0 -2.0 0.0 2.0 4.0 8.0
-8 23.9861 9.62826 4.2526 -5.26029e-06 -4.25267 -9.62115 -23.9861
-4 13.5796 3.49076 1.09329 -0.000141604 -1.09332 -3.49078 -13.5797
-2 10.6018 1.96309 0.405623 3.72998e-06 -0.405629 -1.9631 -10.6018
0 7.80344 1.08544 0.117885 2.28405e-05 -0.117891 -1.08545 -7.80341
2 7.23067 0.884924 0.0521751 1.8926e-05 -0.0521773 -0.884932 -7.23069
4 8.03733 0.901537 0.13761 2.1666e-05 -0.137612 -0.901544 -8.03735
8 21.0973 4.02066 0.933718 -1.0396e-06 -0.933731 -4.02069 -21.097
12 41.9683 23.6979 11.763 -2.3787e-05 -11.7631 -23.6979 -41.9684
</tableData>
<tableData breakPoint="8.0">
-8 -4 -2 0 2 4 8
-8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
-2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
2 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4 0.0 0.0 0.0 0.0 0.0 0.0 0.0
8 0.0 0.0 0.0 0.0 0.0 0.0 0.0
12 0.0 0.0 0.0 0.0 0.0 0.0 0.0
</tableData>
</table>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/planing-roll-moment-lbsft">
<documentation>
Roll moment due to planing. Guessed.
</documentation>
<function>
<product>
<value>0.01</value>
<property>hydro/qbar-u-psf</property>
<property>hydro/buoyancy-roll-moment-lbsft</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/damping-roll-moment-lbsft">
<function>
<product>
<value>1.0</value>
<value>-8000.0</value> <!-- Guess -->
<property>velocities/phidot-rad_sec</property>
</product>
</function>
</fcs_function>
<fcs_function name="hydro/roll-moment-lbsft">
<function>
<product>
<value>1.0</value>
<property>hydro/active-norm</property>
<sum>
<property>hydro/buoyancy-roll-moment-lbsft</property>
<property>hydro/planing-roll-moment-lbsft</property>
<property>hydro/damping-roll-moment-lbsft</property>
</sum>
</product>
</function>
</fcs_function>
</channel>
</system>
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