AVL Tutorial (1) - Basics, Program Structure 

This AVL Tutorial - Part 1 - will teach you the basics and program structure of the Athena Vortex Lattice Code, which is very useful for quick and reliable Aerodynamic Analysis, Trim Calculation, Dynamic Stability Calculation.
I used it extensively in my Bachelor Thesis and further works on the battery-electric touring motorglider FVA 30 (www.fva.rwth-aa..., as a research assistant at the Flight Systems Dynamics Institute of RWTH university (www.fsd.rwth-a...) and for personal UAV and model aircraft design.
AVL was written by Mark Drela and Harold Youngren (Massachusetts Institute of Technology).
"AVL is a program for the aerodynamic and flight-dynamic analysis of rigid aircraft
of arbitrary configuration. It employs an extended vortex lattice model for
the lifting surfaces, together with a slender-body model for fuselages and nacelles.
General nonlinear flight states can be specified. The flight dynamic analysis
combines a full linearization of the aerodynamic model about any flight state,
together with specified mass properties."
More information on web.mit.edu/dre...