📄 airdata2.htm
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<TITLE>FDC help: Airdata2</TITLE>
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<H2>Subsystem <I><FONT FACE="Arial","Helvetica","Sans Serif">Airdata2</FONT></I></H2>
<I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">Airdata2</FONT></I> is a masked S<SMALL>IMULINK</SMALL> subsystem, used to compute the impact pressure <I>q<SUB>c</SUB></I>, equivalent airspeed <I>V<SUB>e</SUB></I>, and the calibrated airspeed <I>V<SUB>c</SUB></I>. The block <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">Airdata2</FONT></I> is contained in the subsystem <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="adgrp.htm">Airdata Group</A></FONT></I> of the system <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="beaver.htm">Beaver</A></FONT></I>. Other airdata
(-related) variables are computed in the blocks <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="atmosph.htm">Atmosph</A></FONT></I>, <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="airdata1.htm">Airdata1</A></FONT></I>, and <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><A HREF="airdata3.htm">Airdata3</A></FONT></I>, which also contained in the subsystem <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif"><I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">Airdata Group</FONT></I></FONT></I>.
<H3>Inputvectors: <I>yatm</I> and <I>yad1</I></H3>
<PRE> yatm = [rho ps T mu g]' (atmospheric properties, computed in
the block <A HREF="atmosph.htm">Atmosph</A>)
yad1 = [a M qdyn]', (speed of sound, Mach number, dynamic
pressure, computed in the block <A HREF="airdata1.htm">Airdata1</A>)
{rho : airdensity [kg/m^3] }
ps : static pressure [N/m^2]
{T : temperature [K] }
{mu : dynamic viscosity [kg/(m*s)] }
{g : acceleration of gravity [m/s^2] }
{a : speed of sound [m/s] }
M : Mach number [-]
qdyn : dynamic pressure [N/m^2]
</PRE>
The inputvariables which are not actually used by <I><FONT SIZE=2 FACE="Arial","Helvetica","Sans Serif">Airdata2</FONT></I> have been displayed between accolades.
<H3>Outputvector: <I>yad2</I></H3>
<PRE> yad2 = [qc Ve Vc]'
qc : impact pressure [N/m^2]
Ve : equivalent airspeed [m/s]
Vc : calibrated airspeed [m/s]
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