+++ /dev/null
-#!/usr/bin/env nickle
-
-void main () {
- real R = 22.16 * 12; /* in lbf / lbm (gas constant for ffff powder */
- real T = 3307; /* combustion temperature for BP */
- real d_mm; /* diameter(mm) */
- real l_mm; /* length(mm) */
- real f_N; /* force(N) */
- real f_lb;
- real A_mm²; /* area of bulkhead (mm²) */
- real A_in²;
- real V_mm³; /* free volume (mm³) */
- real V_in³;
- real M_lb; /* mass of BP in lb */
- real M_g;
- real P_Nmm²; /* pressure (N/mm²) */
- real P_lbin²; /* pressure (psi) */
-
- if (dim(argv) != 4) {
- File::fprintf(stderr,
- "usage: %s diameter(mm) length(mm) force(N)\n",
- argv[0]);
- exit(1);
- }
-
- d_mm = string_to_real(argv[1]);
- l_mm = string_to_real(argv[2]);
- f_N = string_to_real(argv[3]);
- f_lb = f_N * 0.22480894;
-
- A_mm² = pi * (d_mm/2) ** 2;
- V_mm³ = A_mm² * l_mm;
-
- A_in² = A_mm² / (25.4**2);
- V_in³ = V_mm³ / (25.4**3);
-
- P_Nmm² = f_N / A_mm²;
-
- P_lbin² = P_Nmm² * 0.22480894 * (25.4 ** 2);
-
- M_lb = (P_lbin² * V_in³) / (R * T);
- M_g = M_lb * 453.59237;
-
- printf ("Input parameters:\n");
- printf (" Diameter: %.1g (mm) %.3g (in)\n",
- d_mm, d_mm / 25.4);
- printf (" Length: %.1g (mm) %.3g (in)\n",
- l_mm, l_mm / 25.4);
- printf (" Force: %.1g (N) %.3g (lb)\n",
- f_N, f_lb);
-
- printf ("Chamber values:\n");
- printf (" Area: %.0f (mm²) %.3g (in²)\n",
- A_mm², A_in²);
- printf (" Volume: %.0f (mm³) %.3g (in³)\n",
- V_mm³, V_in³);
- printf (" Pressure: %.2g (lb/in²) %.5g (N/mm²)\n",
- P_lbin², P_Nmm²);
-
- printf ("Results:\n");
- printf (" FFFF powder: %.3g (g)\n", M_g);
-}
-
-main();