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[Vasya]

Перепроверил фм для И-180, оказалось "угадал",
потому как - если нарысовать крывые -
попадает близко к полярам И-15/И-153.
Осталось только подтереть пару цифр для уточнения лтх.

[Aircraft]
  Type 1
  Crew 1
  Wingspan 10.09
  Length 6.88
  Seaplane 0
  Canard 0
  Jet 0
  JetHiV 0
[Mass]
  Empty 1960.0
  TakeOff 2550.0
  Oil 40.0
  Fuel 300.0
[Controls]
  CAileron 1
  CAileronTrim 1
  CElevator 1
  CElevatorTrim 1
  CRudder 1
  CRudderTrim 1
  CFlap 1
  CFlapPos 2
  CDiveBrake 0
  CInterceptor 0
  CEngine 1
  CVectoredThrust 0
  CUndercarriage 1
  CLockTailwheel 1
  CStabilizer 0
  CArrestorHook 0
  CWingFold 0
  CCockpitDoor 0
  CAileronThreshold 380.0
  CRudderThreshold 400.0
  CElevatorThreshold 430.0
  DefaultAileronTrim -0.014
  DefaultElevatorTrim -0.00
  DefaultRudderTrim -0.0667
[Squares]
  Wing 16.11
  Aileron 1.4
  Flap 1.63
  Stabilizer 1.84
  Elevator 0.92
  Keel 0.8
  Rudder 0.54
  Wing_In 3.00
  Wing_Mid 2.50
  Wing_Out 2.75
  AirbrakeCxS 0.0
[Arm]
  Aileron 3.5
  Flap 1.3
  Stabilizer 4.2
  Keel 4.16
  Elevator 4.65
  Rudder 4.75
  Wing_In 1.25
  Wing_Mid 2.50
  Wing_Out 4.10
  Wing_V 6.30
  GCenter 0.03
  GCenterZ 0.00
  GC_AOA_Shift 0.20
  GC_Flaps_Shift 0.15
  GC_Gear_Shift -0.15
[Toughness]
  AroneL 100
  AroneR 100
  CF 450
  Engine1 350
  Engine2 350
  Engine3 350
  Engine4 350
  GearL2 200
  GearR2 200
  Keel1 170
  Keel2 170
  Nose 170
  Oil 100
  Rudder1 100
  Rudder2 100
  StabL 170
  StabR 170
  Tail1 120
  Tail2 100
  Turret1B 100
  Turret2B 100
  Turret3B 100
  Turret4B 100
  Turret5B 100
  Turret6B 100
  VatorL 100
  VatorR 100
  WingLIn 100
  WingLMid 100
  WingLOut 100
  WingRIn 100
  WingRMid 100
  WingROut 100
  Flap01 100
  Flap02 100
  Flap03 100
  Flap04 100
[Engine]
  Engine0Family M-82_Series(MOD):I_180_FM
  Engine0SubModel M-88B/I-180
[Gear]
  H 1.774966
  Pitch 14.450
  SinkFactor 400.0
  SpringsStiffness 0.5  
[Params]
  CriticalAOA 17.00
  CriticalCy 01.36
  CxCurvature 00.45
  CxStraightness 00.10
  CriticalAOAFlap 17.00
  CriticalCyFlap 01.55
  SpinTailAlpha 16.50
  SpinCxLoss 0.075
  SpinCyLoss 0.025
  Vyfac 0.8
  Tfac 1.13
  Vmin 160.0
  Vmax 463.0
  VmaxAllowed 720.0
  VmaxH 575.0
  HofVmax 6550.0
  VminFLAPS 130.0
  VmaxFLAPS 270.0
  Vz_climb 19.0
  V_climb 270.0
  T_turn 18.0
  V_turn 300.0
  K_max 9.0
  Cy0_max 0.14
  FlapsMult 1.0
  FlapsAngSh 11.0
  G_class_coeff 22.0
  G_class 12.0
  ReferenceWeight  25.0
  Range 600.0
  CruiseSpeed 330.0
  SensYaw 0.46
  SensPitch 0.65
  SensRoll 0.34
[Polares]
  lineCyCoeff 0.090     // Cy (0.38+ -0.34)=0.72:8*=0.090   
  AOAMinCx_Shift 0.4
  Cy0_0 0.14
  AOACritH_0 16.5
  AOACritL_0 -15.0
  CyCritH_0 1.32
  CyCritL_0 -0.83
  CxMin_0 0.029
  parabCxCoeff_0 5.0E-4
  Cy0_1 0.625
  AOACritH_1 15.0
  AOACritL_1 -22.0
  CyCritH_1 1.547752
  CyCritL_1 -0.77
  CxMin_1 0.0926
  parabCxCoeff_1 6.4E-4
  Decline 0.010
  parabAngle 4.7
  Decline 0.010
  maxDistAng 37.0
  draw_graphs 0
  mc3 -18.691,-13.962,-6.0476,-21.73,-7.3847,10.433,35.813,58.928
  mc4 41.96,26.054,12.154,98.939,119.72,10.045,-144.86,-341.56
  mm 0.574,0.707,0.781,0.732,0.716,0.678,0.636,0.603
  mz 0.246,0.305,0.329,0.159,0.089,0.09,0.094,0.093
[SOUND]
  Engine fw_190
  Start p_start
  Prop fw_prop

CyCritH_0 1.32 - взял от Миг-3.
Так как закрылки там (на И-180) "потрясные", как хвост северного песца, то взял среднюю цифру.
CyCritH_1 1.547752
Без рысованной поляры после продувки можно только гадать
на кофейной гуще.
Возможно от 1.53 до 1.56.
Если взять еффективность закрылков/щитков за 0.8 от щитков Миг-3,
то выходит Су_крит. - 1.53+++.
То есть Су_крит. на посадке выше 1.54 может и не быть.