be the nose of the aircraft; any arbitrary point will do, but all of the dimensions need to be referenced from that point. Incidence angles can also be added to the wing and horizontal tail. Body parameters The BODY Namelist defines the shape of the body. Digital DATCOM assumes an axisymmetrical shape for the body. Up to 20 stations can be specified with the fuselage half-width, upper coordinate and lower coordinate being defined at each station. For supersonic analysis, additional parameters can be input. Wing, Horizontal and Vertical Tail parameters The WGPLNF, HTPLNF and VTPLNF Namelists define the wing, horizontal tail and vertical tail, respectively. The basic parameters such as root chord, tip chord, half-span, twist, dihedral and sweep are input. Digital DATCOM also accepts wing planforms which change geometry along the span such as the F4 Phantom II which had 15 degrees of outboard dihedral. Canards can also be analyzed in Digital DATCOM. The canard must be specified as the forward lifting surface (i.e. wing) and the wing as the aft lift surface. For airfoil designations, most traditional NACA 4-, 5-, and 6- airfoils can be specified in Digital DATCOM. Additionally, custom airfoils can be input using the appropriate namelists. Also, twin vertical tails can be designated in Digital DATCOM, but not twin booms. High Lift and Control Devices Using the SYMFLP and ASYFLP Namelists, flaps, elevators, and ailerons can be defined. Digital DATCOM allows a multitude of flap types including plain, single-slotted, and fowler flaps. Up to 9 flap deflections can be analyzed at each Mach-altitude combination. Unfortunately, the rudder is not implemented in Digital DATCOM. Digital DATCOM also offers an automated aircraft TRIM function which calculates elevator deflections needed to trim the aircraft. Other Inputs Other Digital DATCOM inputs include power effects (propeller and jet), ground effects, trim tabs, and experimental data. The EXPRXX Namelist allows a user to use experimental data (such as coefficient of lift, coefficient of drag, etc.) in lieu of the data Digital DATCOM produces in the intermediate steps of its component build-up. All dimensions are taken in feet and degrees unless specified otherwise. Digital DATCOM provides commands for outputting the dynamic derivatives (DAMP) as well as the stability coefficients of each components (BUILD). Output Digital DATCOM produces a copious amount of data for the relatively small amount of inputs it requires. By default, only the data for the aircraft is output, but