Planform — Tailless Flying Wing Designer

Controls

00Preset planform

Loads a simplified, approximate starting geometry — everything stays fully editable afterward. Not a scale drawing of any specific aircraft.

01Drawing units

Sweep reference line

LE 1/4c 1/2c TE

02Planform — wing

Wingspan (full, tip–tip)

Root chord

Sweep — inboard panel

deg

Cranked (two-panel) planform

Tip chord

03Twist & dihedral

Logged in the title block and applied as spanwise twist/dihedral in the 3D model. Not drawn on the 2D line planform.

Washout (wingtip, − = reflex up)

deg

Dihedral

deg

04Fuselage / center-body

Include fuselage section

Include fuselage in MAC / CG calc

05Airfoils (3D)

Standard NACA 4-digit sections only. Shape blends smoothly from root to tip across the span in the 3D model; twist from Section 03 is applied on top.

Root airfoil (NACA 4-digit)

Root reflex (TE deflection)

deg

Tip airfoil (NACA 4-digit)

Tip reflex (TE deflection)

deg

Positive reflex = trailing edge deflected up, typical for a stable tailless section. Over the fuselage width the root airfoil is held constant.

06Notes

MAC and CG% are computed by exact spanwise integration of the drawn panels. The shaded band on the planform marks 10–25% of local chord at every station — a common conservative static-margin range for tailless aircraft, not a guarantee of stability for any specific design. Verify against your own stability analysis before building.

Fuselage Wing outline 10–25% local chord band MAC Station probe