2 A Create A Spreadsheet To Calculate The Iocation Of The Centre Of Gravity B Write Down The Formula For The Neutral 1 (107.41 KiB) Viewed 36 times
2) a) Create a spreadsheet to calculate the Iocation of the centre of gravity, b) Write down the formula for the neutral point. c) Is the neutral point in (b). stick free or fixed? d) Calculate the location of the neutral point for an aircraft shown in the schematic below. Take the aerodynamic center to be 400 mm. All dimensions in mr CMO0=−0.125 Taiplane is symmetric ε0=0dαdε=0.0333 (approx.) a1 W=4.77/rada1 T=6.098/radSW=0.69 m2 ST=0.07 m2 m. a.c. =0.23 m Wing Span =3 m Tailplane span =0.6 m Tail chord =0.12 m Oswald efficiency factor =0.8
(e) Define static margin? (f) Should we calculate Stick-free or fixed given the data we have above? (g). What does it mean if CM0 is negative? NB lift curve slopes are for 2D wing sections and must be modified for 3D, finite, wings. a3D=[1+πARea2D]a2D
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