<?xml version="1.0"?>
<system name="engine">
<channel name="Volumetric efficiency">
<fcs_function name="Volumetric efficiency">
<function>
<table>
<independentVar lookup="row">atmosphere/density-altitude</independentVar>
<independentVar lookup="column">aero/qbar-psf</independentVar>
<tableData>
0 130
130 0.8443 0.8443
428 0.8239 0.8239
4387 0.7038 0.7038
9188 0.6697 0.6697
13920 0.6373 0.6373
15864 0.6249 0.6249
17796 0.5899 0.5659
19706 0.5787 0.5428
21650 0.5648 0.5292
23672 0.6052 0.5666
</tableData>
</table>
</function>
<output>propulsion/engine/volumetric-efficiency</output>
</fcs_function>
</channel>
<channel name="Power">
<fcs_function name="BSFC">
<function>
<table>
<independentVar lookup="row">atmosphere/density-altitude</independentVar>
<independentVar lookup="column">aero/qbar-psf</independentVar>
<tableData>
0 130
130 0.4788 0.4805
428 0.4761 0.4776
4387 0.4464 0.4475
9188 0.4466 0.4475
13920 0.44655 0.4473
15864 0.4466 0.44728
17796 0.4126 0.4131
19796 0.3796 0.38
21650 0.3469 0.34724
23672 0.3464 0.34675
</tableData>
</table>
</function>
<output>propulsion/engine/bsfc-lbs_hphr</output>
</fcs_function>
</channel>
</system>
S&J wrote in Fri Nov 26, 2021 9:38 pm:We need to understand the tables needed to keep the fuel consumption static at 0.045lbs/sec and power static at 285hp up to the critical alt.
<?xml version="1.0"?>
<system name="engine">
<channel name="Volumetric efficiency">
<fcs_function name="Volumetric efficiency">
<function>
<table>
<independentVar lookup="row">atmosphere/density-altitude</independentVar>
<independentVar lookup="column">aero/qbar-psf</independentVar>
<tableData>
0 130
130 0.8443 0.8443
428 0.8239 0.8239
4387 0.7038 0.7038
9188 0.6697 0.6697
13920 0.6373 0.6373
15864 0.6249 0.6249
17796 0.5899 0.5659
19706 0.5899 0.5428
21650 0.5899 0.5428
23672 0.5899 0.5428
</tableData>
</table>
</function>
<output>propulsion/engine/volumetric-efficiency</output>
</fcs_function>
</channel>
<channel name="Power">
<fcs_function name="BSFC">
<function>
<table>
<independentVar lookup="row">atmosphere/density-altitude</independentVar>
<independentVar lookup="column">aero/qbar-psf</independentVar>
<tableData>
0 130
130 0.4788 0.4805
428 0.4761 0.4776
4387 0.4464 0.4475
9188 0.4466 0.4475
</tableData>
</table>
</function>
<output>propulsion/engine/bsfc-lbs_hphr</output>
</fcs_function>
</channel>
</system>
S&J wrote in Sat Nov 27, 2021 12:41 pm:and but not required if you want to adjust manually
a bit of code that automatically adjusts the mixture to maintain the AFR at 9.9
TheEagle wrote in Sat Nov 27, 2021 5:05 pm:Well, I doubt this works this way in reality - should be % throttle == % power.
Return to Flight dynamics model
Users browsing this forum: No registered users and 1 guest