============================================== AERODYNAMIC KEYS — GROUPED LIST (SF2 BUILD) ============================================== -------- (legend: -------- FLIGHT DYNAMICS PARAMETERS α = AoA (angle of attack, deg): Angle between wing chord and relative wind. β = sideslip (deg): Angle of sideways slide relative to flight path. p = roll-rate (rad/s): Rate of rotation around longitudinal axis. q = pitch-rate (rad/s): Rate of rotation around lateral axis. r = yaw-rate (rad/s): Rate of rotation around vertical axis. S = wing area (m²): Reference surface area for lift/drag calculations. c̄ = MAC (mean aerodynamic chord, m): Average wing chord length. AERODYNAMIC COEFFICIENTS (Force and Moment Multipliers) CL = lift coefficient: Total lift force multiplier (e.g., A-10’s CL rises in turns). CD = drag coefficient: Total drag force multiplier (e.g., F-100’s CD spikes with spoilers). Cm = pitching moment coefficient: Torque rotating nose up/down (e.g., F-4’s Cm balances pitch). Cl = rolling moment coefficient: Torque rotating wings left/right (e.g., F-104’s Cl drives fast rolls). Cn = yawing moment coefficient: Torque rotating nose left/right (e.g., MiG-15’s Cn fights fishtailing). Cy = sideforce coefficient: Lateral force pushing plane sideways (e.g., A-10’s Cy stabilizes slips). SUBSCRIPT MODIFIERS (Coefficient Conditions) a = vs. AoA (α): Effect tied to angle of attack (e.g., CLa for lift slope). 0 = at zero AoA: Baseline effect at α=0° (e.g., CL0 for camber lift). dc = delta control: Change per degree of control surface deflection (e.g., Cldc for aileron roll). b = vs. sideslip (β): Effect from sideslip angle (e.g., Cnb for yaw stability). p = vs. roll-rate (p): Effect from roll rate (e.g., Clp for roll damping). q = vs. pitch-rate (q): Effect from pitch rate (e.g., Cmq for pitch damping). r = vs. yaw-rate (r): Effect from yaw rate (e.g., Cnr for yaw damping). α̇ = vs. AoA-rate: Effect from rate of AoA change (e.g., Cmad for pitch damping). ----------------------------------------------------------------------------------------- READ CONDITIONS • Set HasAeroCoefficients=TRUE in the component. • For wings/tails, usually also set LiftSurface=TRUE. ------------------------------- BASE COEFFICIENTS (LIFT / DRAG) ------------------------------- CLa — Lift-curve slope (dCL/dα): how fast CL rises with α CL0 — Baseline lift at α=0° (camber/trim bias) CD0 — Zero-lift (parasite) drag baseline CDL — Induced/α-related drag (drag from making lift) ------------------------------ LONGITUDINAL (PITCH) STABILITY ------------------------------ Cm0 — Baseline pitching moment (nose-up/down bias) Cmq — Pitch-rate damping (moment vs q) Cmad — Pitch moment vs AoA-rate (α̇) ----------------------------- LATERAL STABILITY (ROLL AXIS) ----------------------------- Clb — Roll moment vs β (dihedral effect) Clp — Roll-rate damping (moment vs p) Clr — Roll moment from yaw-rate r (roll–yaw coupling) | Cross-Coupling -------------------------------- DIRECTIONAL STABILITY (YAW AXIS) -------------------------------- Cnb — Yaw moment vs β (weathercock stability) Cnr — Yaw-rate damping (moment vs r) Cnp — Yaw moment from roll-rate p (adverse yaw) | Cross-Coupling ----------------------------------------------- SIDE FORCE COEFFICIENTS (FUSELAGE / TALL EFFECTS) ----------------------------------------------- Cyb — Sideforce vs β (sideslip) | Fuselage + Vertical Tail Cyp — Sideforce from roll-rate p (cross-coupling) Cyr — Sideforce from yaw-rate r (cross-coupling) ------------------------------------------------------------ CONTROL SURFACE COEFFICIENTS (DELTAS) — from TControlSurface ------------------------------------------------------------ (Defines the CHANGE in a coefficient per degree of surface deflection) CDdc — Drag change per degree. CLiftdc — Lift change per degree. Cmdc — Pitching moment change per degree. Cydc — Sideforce change per degree. Cldc — Rolling moment change per degree. Cndc — Yawing moment change per degree. --------------------------- GEOMETRY / REFERENCE POINTS --------------------------- Xac — Aerodynamic-center X-location (can be tabled vs Mach). Qr — Downwash / relief factor (vs α). DownwashAlphaTable — Downwash effect vs α for downstream surfaces. ------------------------- STALL / ENVELOPE BEHAVIOR ------------------------- CheckStall — Enable stall modeling for this surface. AlphaStall — AoA (deg) where stall onset begins. AlphaMax — Max AoA clamp (deg) AlphaDepart — AoA (deg) where departure / spin may begin CLmax — Max lift coefficient before stall limits apply. StallMoment — Extra pitching moment in stall StallDrag — Extra drag multiplier in stall StallHysteresi — AoA gap between stall entry / exit ======================= ALLOWED AERO TABLE KEYS ======================= [Mach-based tables] — scale vs Mach number • CLaMachTable — scales CLa (lift slope) with Mach • CD0MachTable — scales CD0 (parasite drag) with Mach • CL0MachTable — scales CL0 (zero-AoA lift) with Mach • CmqMachTable — scales Cmq (pitch-rate damping) with Mach ------------------------------------------------------------------------------ NOTE: This is a position shift, not a multiplier) • XacMachTable — **shifts** Xac (position) with Mach ← not a multiplier ------------------------------------------------------------------------------ [Alpha-based tables - for Base Coefficients] • CDLAlphaTable — scales CDL (induced/α-drag) with α • Cm0AlphaTable — scales Cm0 (baseline pitch moment) with α • ClbAlphaTable — scales Clb (roll vs β) with α • ClpAlphaTable — scales Clp (roll-rate damping) with α • ClrAlphaTable — scales Clr (roll from r) with α • CnbAlphaTable — scales Cnb (yaw vs β) with α • CnpAlphaTable — scales Cnp (yaw from p) with α • CnrAlphaTable — scales Cnr (yaw-rate damping) with α • QrAlphaTable — scales Qr (downwash/relief) with α [Alpha-based tables — Control Surface Deltas] • CmdcAlphaTable — scales Cmdc (pitch delta) with α • CldcAlphaTable — scales Cldc (roll delta) with α • CndcAlphaTable — scales Cndc (yaw delta) with α • CLiftdcAlphaTable — scales `CLiftdc` (lift delta) with α [Control Effectiveness Tables - for TControlSurface] • ControlIASTable — scales overall effectiveness vs Indicated Airspeed • ControlMachTable — scales overall effectiveness vs Mach number ---------------- STALL-REGION FX ---------------- StallLiftTable — Detailed CL shaping deep into stall StallDragTable — Detailed CD rise deep into stall StallXacShiftTable — Xac shift vs α in stall