update(systems): fuel flow factor, vnav parameter

headwindsim · Nov 7, 2023 · 45607b9 · 45607b9
1 parent 64958f3
commit 45607b9
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Showing 4 changed files with 18 additions and 16 deletions.
diff --git a/hdw-a333x/src/wasm/fadec_a330/src/RegPolynomials.h b/hdw-a333x/src/wasm/fadec_a330/src/RegPolynomials.h
@@ -187,15 +187,16 @@ class Polynomial {
   /// </summary>
   double correctedEGT(double cn1, double cff, double mach, double alt) {
     double outCEGT = 0;
-    cff = cff / 2;  // to account for the A380 double fuel flow. Will have to be taken care of
+    double cff_a330 = 2.7;
 
-    double c_EGT[16] = {3.2636e+02,  0.0000e+00, 9.2893e-01, 3.9505e-02,  3.9070e+02, -4.7911e-04, 7.7679e-03,  5.8361e-05,
-                        -2.5566e+00, 5.1227e-06, 1.0178e-07, -7.4602e-03, 1.2106e-07, -5.1639e+01, -2.7356e-03, 1.9312e-08};
+    double c_EGT[16] = {443.3145034,    0.0000000e+00, 3.0141710e+00,  3.9132758e-02, -4.8488279e+02, -1.2890964e-03,
+                        -2.2332050e-02, 8.3849683e-05, 6.0478647e+00,  6.9171710e-05, -6.5369271e-07, -8.1438322e-03,
+                        -5.1229403e-07, 7.4657497e+01, -4.6016728e-03, 2.8637860e-08};
 
-    outCEGT = c_EGT[0] + c_EGT[1] + (c_EGT[2] * cn1) + (c_EGT[3] * cff) + (c_EGT[4] * mach) + (c_EGT[5] * alt) +
-              (c_EGT[6] * powFBW(cn1, 2)) + (c_EGT[7] * cn1 * cff) + (c_EGT[8] * cn1 * mach) + (c_EGT[9] * cn1 * alt) +
-              (c_EGT[10] * powFBW(cff, 2)) + (c_EGT[11] * mach * cff) + (c_EGT[12] * cff * alt) + (c_EGT[13] * powFBW(mach, 2)) +
-              (c_EGT[14] * mach * alt) + (c_EGT[15] * powFBW(alt, 2));
+    outCEGT = c_EGT[0] + c_EGT[1] + (c_EGT[2] * cn1) + (c_EGT[3] * cff_a330) + (c_EGT[4] * mach) + (c_EGT[5] * alt) +
+              (c_EGT[6] * powFBW(cn1, 2)) + (c_EGT[7] * cn1 * cff_a330) + (c_EGT[8] * cn1 * mach) + (c_EGT[9] * cn1 * alt) +
+              (c_EGT[10] * powFBW(cff_a330, 2)) + (c_EGT[11] * mach * cff_a330) + (c_EGT[12] * cff_a330 * alt) +
+              (c_EGT[13] * powFBW(mach, 2)) + (c_EGT[14] * mach * alt) + (c_EGT[15] * powFBW(alt, 2));
 
     return outCEGT;
   }
@@ -205,10 +206,11 @@ class Polynomial {
   /// </summary>
   double correctedFuelFlow(double cn1, double mach, double alt) {
     double outCFF = 0;
+    double a330_f = 2.7;
 
-    double c_Flow[21] = {-1.7630e+02, -2.1542e-01, 4.7119e+01,  6.1519e+02,  1.8047e-03, -4.4554e-01, -4.3940e+01,
-                         4.0459e-05,  -3.2912e+01, -6.2894e-03, -1.2544e-07, 1.0938e-02, 4.0936e-01,  -5.5841e-06,
-                         -2.3829e+01, 9.3269e-04,  2.0273e-11,  -2.4100e+02, 1.4171e-02, -9.5581e-07, 1.2728e-11};
+    double c_Flow[21] = {-639.6602981, 0.00000e+00,  1.03705e+02,  -2.23264e+03, 5.70316e-03, -2.29404e+00, 1.08230e+02,
+                         2.77667e-04,  -6.17180e+02, -7.20713e-02, 2.19013e-07,  2.49418e-02, -7.31662e-01, -1.00003e-05,
+                         -3.79466e+01, 1.34552e-03,  5.72612e-09,  -2.71950e+02, 8.58469e-02, -2.72912e-06, 2.02928e-11};
 
     outCFF = c_Flow[0] + c_Flow[1] + (c_Flow[2] * cn1) + (c_Flow[3] * mach) + (c_Flow[4] * alt) + (c_Flow[5] * powFBW(cn1, 2)) +
              (c_Flow[6] * cn1 * mach) + (c_Flow[7] * cn1 * alt) + (c_Flow[8] * powFBW(mach, 2)) + (c_Flow[9] * mach * alt) +
@@ -217,7 +219,7 @@ class Polynomial {
              (c_Flow[16] * cn1 * powFBW(alt, 2)) + (c_Flow[17] * powFBW(mach, 3)) + (c_Flow[18] * powFBW(mach, 2) * alt) +
              (c_Flow[19] * mach * powFBW(alt, 2)) + (c_Flow[20] * powFBW(alt, 3));
 
-    return 2 * outCFF;
+    return outCFF * a330_f;
   }
 
   double oilTemperature(double energy, double preOilTemp, double maxOilTemp, double deltaTime) {

diff --git a/hdw-a339x/src/systems/fmgc/src/guidance/vnav/EngineModel.ts b/hdw-a339x/src/systems/fmgc/src/guidance/vnav/EngineModel.ts
@@ -238,7 +238,7 @@ export class EngineModel {
                     + (coefficients[17] * mach ** 3) + (coefficients[18] * mach ** 2 * alt) + (coefficients[19] * mach * alt ** 2)
                     + (coefficients[20] * alt ** 3);
 
-        return flow * 2.7;
+        return flow * 2.4;
     }
 
     // static getCN1fromUncorrectedThrust(thrust: number)

diff --git a/hdw-a339x/src/systems/fmgc/src/guidance/vnav/FlightModel.ts b/hdw-a339x/src/systems/fmgc/src/guidance/vnav/FlightModel.ts
@@ -2,11 +2,11 @@ import { MathUtils } from '@flybywiresim/fbw-sdk';
 import { Common, FlapConf } from './common';
 
 export class FlightModel {
-    static Cd0 = 0.0200;
+    static Cd0 = 0.0280;
 
     static wingSpan = 209.97;
 
-    static wingArea = 5010;
+    static wingArea = 3892.23;
 
     static wingEffcyFactor = 0.72;
 

diff --git a/hdw-a339x/src/wasm/fadec_a330/src/RegPolynomials.h b/hdw-a339x/src/wasm/fadec_a330/src/RegPolynomials.h
@@ -187,7 +187,7 @@ class Polynomial {
   /// </summary>
   double correctedEGT(double cn1, double cff, double mach, double alt) {
     double outCEGT = 0;
-    double cff_a330 = 2.7;
+    double cff_a330 = 2.4;
 
     double c_EGT[16] = {443.3145034,    0.0000000e+00, 3.0141710e+00,  3.9132758e-02, -4.8488279e+02, -1.2890964e-03,
                         -2.2332050e-02, 8.3849683e-05, 6.0478647e+00,  6.9171710e-05, -6.5369271e-07, -8.1438322e-03,
@@ -206,7 +206,7 @@ class Polynomial {
   /// </summary>
   double correctedFuelFlow(double cn1, double mach, double alt) {
     double outCFF = 0;
-    double a330_f = 2.7;
+    double a330_f = 2.4;
 
     double c_Flow[21] = {-639.6602981, 0.00000e+00,  1.03705e+02,  -2.23264e+03, 5.70316e-03, -2.29404e+00, 1.08230e+02,
                          2.77667e-04,  -6.17180e+02, -7.20713e-02, 2.19013e-07,  2.49418e-02, -7.31662e-01, -1.00003e-05,