input parameters of this program with more than 600 code line is as following:
type: this variable is a upercase string (text) variable. that detemines standard type used for drawing plots. if General Aviation
Standards is intended the phrase 'GA', and if Military Standards is intended the phrase 'MIL', will be used. in the case of using
MIL the negative load coefficient (nNeg) will be calculated by application with relation provided in military standards and input nNeg
is unused.

m or mTO: is float numerical variable that equals to aircraft weight in phase forwhich vn is plotted. like cruise phase or takeoff and
the unit is in kg.

sigma: is float numerical variable that equals to ratio of air density at intended flight phase height to air density at sea level this
value depends on height and is a number between 0 to 1. it is considered number 1 at sea level, for example.

vG: is float numerical variable that equals to designed velocity for maximum intensity of gust that never exceed vH and couldnot be
less than obtained velocity from intersection of c.l.max.pos line and gust line. the unit is in m/s.

vH: is float numerical variable that equals to maximum level speed of aircraft. infact this speed is obtained from intersection of Drag or
required thrust and available thrust versus velocity graphes. (second intersected point). the unit is in m/s.

vD: is float numerical variable that equals to desined dive speed which usually is considered as 1.05x vH to 1.15x vH. the unit is in m/s.

nPos: is float numerical variable that equals to positive load coefficient limit (the positive horizontal line at vn graph without effect of Gust).

nNeg: is float numerical variable that equals to negative load coefficient limit (the negative horizontal line at vn graph without effect of Gust).
in case of selecting of MIL it has no effect and can be considered 0 but can't be empty.

cLMaxPos: is float numerical variable that equals to maximum lift coefficient for whole of aircraft, in state of positive load coefficient.

cLMaxNeg: is float numerical variable that equals to maximum lift coefficient for whole of aircraft, in state of negative load coefficient.

sRef: is float numerical variable that is considered equals to reference area, that for aircraft it is usually wing area. the unit is in m^2.

MAC: is float numerical variable that equals to Mean Aerodynamics Chord as length reference that usually is for wing. the unit is in m.

cLalpha: is float numerical variable that equals to slope of linear graph of lift coefficient versus angle of attack. for whole of aircraft
the unit is in rad^-1

in plotting of vn diagram for velocity it must considered that: vG<vH<vD
after running of application 3 output files like following graphs will be saved in folder which program run with .fig suffix

 

then with adding DataCursor at intended points a graph as below is obtained:

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