%% $Date: 2012-07-06 17:42:54#$
%% $Revision: 148 $
\index{velocity\_tas\_longitudinal\_cnrm}
\algdesc{Longitudinal true airspeed}
{ %%%%%% Algorithm name %%%%%%
velocity\_tas\_longitudinal\_cnrm
}
{ %%%%%% Algorithm summary %%%%%%
Calculates the true air speed along the longitudinal axis of the aircraft.
}
{ %%%%%% Category %%%%%%
Thermodynamics
}
{ %%%%%% Inputs %%%%%%
$V_t$ & Vector & True air speed [m/s] \\
$\alpha$ & Vector & Angle of attack [rad] \\
$\beta$ & Vector & Sideslip angle [rad] 
}
{ %%%%%% Outputs %%%%%%
$V_{tx}$ & Vector & Longitudinal true air speed [m/s]
}
{ %%%%%% Formula %%%%%%
\begin{displaymath}
 V_{tx} = \frac{V_t}{\sqrt{1 + \tan^2 \alpha + \tan^2 \beta}}
\end{displaymath}
}
{ %%%%%% Author %%%%%%
CNRM/GMEI/TRAMM
}
{ %%%%%% References %%%%%% 
NCAR-RAF Bulletin \#23 \cite{NCAR23}
}


