1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 Purpose: Encapsulates the nozzle object
8 ------------- Copyright (C) 2000 Jon S. Berndt (jsb@hal-pc.org) -------------
10 This program is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free Software
12 Foundation; either version 2 of the License, or (at your option) any later
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 You should have received a copy of the GNU General Public License along with
21 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
22 Place - Suite 330, Boston, MA 02111-1307, USA.
24 Further information about the GNU General Public License can also be found on
25 the world wide web at http://www.gnu.org.
27 FUNCTIONAL DESCRIPTION
28 --------------------------------------------------------------------------------
31 --------------------------------------------------------------------------------
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
40 static const char *IdSrc = "$Id$";
41 static const char *IdHdr = ID_NOZZLE;
43 extern short debug_lvl;
45 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
47 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
50 FGNozzle::FGNozzle(FGFDMExec* FDMExec, FGConfigFile* Nzl_cfg) : FGThruster(FDMExec)
54 Name = Nzl_cfg->GetValue("NAME");
55 cout << " Nozzle Name: " << Name << endl;
56 Nzl_cfg->GetNextConfigLine();
57 while (Nzl_cfg->GetValue() != "/FG_NOZZLE") {
61 cout << " Nozzle Exit Pressure = " << PE << endl;
62 } else if (token == "EXPR") {
64 cout << " Nozzle Expansion Ratio = " << ExpR << endl;
65 } else if (token == "NZL_EFF") {
67 cout << " Nozzle Efficiency = " << nzlEff << endl;
68 } else if (token == "DIAM") {
70 cout << " Nozzle Diameter = " << Diameter << endl;
72 cout << "Unhandled token in Nozzle config file: " << token << endl;
79 if (debug_lvl & 2) cout << "Instantiated: FGNozzle" << endl;
82 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
86 if (debug_lvl & 2) cout << "Destroyed: FGNozzle" << endl;
89 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
91 float FGNozzle::Calculate(float CfPc)
93 float pAtm = fdmex->GetAtmosphere()->GetPressure();
95 Thrust = (CfPc + (PE - pAtm)*ExpR) * (Diameter / ExpR) * nzlEff;
100 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
102 float FGNozzle::GetPowerRequired(void)
107 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
109 void FGNozzle::Debug(void)
111 //TODO: Add your source code here