Aircraft/tu154b/Nasal/engines.nas

   1 #
   2 #
   3 # Engine support
   4 #
   5 # Project Tupolev for FlightGear
   6 #
   7 # Yurik V. Nikiforoff, yurik.nsk@gmail.com
   8 # Novosibirsk, Russia
   9 # aug 2008
  10 #
  11
  12 # engine support
  13
  14 var ENGINE_UPDATE_PERIOD = 0.5;
  15 var starter_rpm_1 = 0.0;
  16 var starter_rpm_2 = 0.0;
  17 var starter_rpm_3 = 0.0;
  18
  19 var start_engine = func{
  20         var engine_prop = -1;
  21         # Is start subsystem  serviceable?
  22         if( getprop("tu154/switches/startpanel-start" ) != 1.0 ) return;
  23         if( getprop("tu154/lamps/pump-1") != 1.0 ) return;
  24         if( getprop("tu154/lamps/pump-2") != 1.0 ) return;
  25         if( getprop("tu154/lamps/pump-3") != 1.0 ) return;
  26         if( getprop("tu154/lamps/pump-4") != 1.0 ) return;
  27         if( getprop("tu154/lamps/auto-consumption-failure") == 1.0 ) return;
  28         if( getprop( "tu154/systems/APU/APU-ready" ) == 0 ) return;
  29         if( getprop( "tu154/systems/APU/APU-bleed" ) != 5.0 ) return;   # need bleed
  30
  31         # which engine we want start?
  32         if( getprop("tu154/switches/startpanel-selector-1" ) == 1.0 )
  33                 engine_prop = "controls/engines/engine[0]/starter";
  34         if( getprop("tu154/switches/startpanel-selector-2" ) == 1.0 )
  35                 engine_prop = "controls/engines/engine[1]/starter";
  36         if( getprop("tu154/switches/startpanel-selector-3" ) == 1.0 )
  37                 engine_prop = "controls/engines/engine[2]/starter";
  38         if( engine_prop == -1 ) return; # engine not selected
  39
  40 #let's start selected engine
  41         setprop(engine_prop, 1);
  42 }
  43
  44
  45 var break_start = func{
  46 # which engine we start now?
  47         var engine_prop = -1;
  48         if( getprop("tu154/switches/startpanel-selector-1" ) == 1.0 )
  49                 {
  50                 engine_prop = "controls/engines/engine[0]/starter";
  51                 var engine_cutoff = "controls/engines/engine[0]/cutoff";
  52                 }
  53         if( getprop("tu154/switches/startpanel-selector-2" ) == 1.0 )
  54                 {
  55                 engine_prop = "controls/engines/engine[1]/starter";
  56                 var engine_cutoff = "controls/engines/engine[1]/cutoff";
  57                 }
  58         if( getprop("tu154/switches/startpanel-selector-3" ) == 1.0 )
  59                 {
  60                 engine_prop = "controls/engines/engine[2]/starter";
  61                 var engine_cutoff = "controls/engines/engine[2]/cutoff";
  62                 }
  63         if( engine_prop == -1 ) return; # engine not selected
  64
  65 #break start procedure of selected engine
  66         setprop(engine_prop, 0);
  67         setprop(engine_cutoff, 1);
  68 }
  69
  70 var start_apu = func{
  71 # Is start subsystem  serviceable?
  72
  73 if( getprop( "tu154/switches/APU-starter-selector" ) != 1.0 ) return;
  74 if( getprop("tu154/systems/electrical/indicators/apu-ready-to-start") != 1.0 ) return;
  75 #let's start selected engine
  76         setprop("controls/engines/engine[3]/starter", 1);
  77         setprop("tu154/systems/electrical/indicators/apu-start", 1.0 );
  78 }
  79
  80 var stop_apu = func{
  81         setprop("controls/engines/engine[3]/starter", 0);
  82         setprop("controls/engines/engine[3]/cutoff", 1);
  83 }
  84
  85
  86 var eng_1_handler = func{
  87 settimer( eng_1_handler, ENGINE_UPDATE_PERIOD );
  88
  89 if( getprop( "engines/engine[0]/egt-degf" ) == nil ) return;
  90 if( getprop( "controls/engines/engine[0]/cutoff" ) == nil ) return;
  91 if( getprop( "engines/engine[0]/n2" ) == nil ) return;
  92 var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
  93 if( pwr == nil ) return;
  94 # check 27V and blank lamps and exit if power off
  95 if(  pwr < 13.0 ) { check_lamps_eng(); return; }
  96
  97 # EGT delivery to fdm property tree
  98 setprop( "fdm/jsbsim/propulsion/engine[0]/egt-degc",
  99                 getprop( "engines/engine[0]/egt-degf" ) * 0.55 - 17 );
 100
 101
 102 if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return;
 103
 104 if( getprop( "controls/engines/engine[0]/cutoff" ) == 1 )
 105  if( getprop( "engines/engine[0]/n2" ) > 20.0 )
 106       if( getprop( "tu154/switches/startpanel-cold" ) == 1 )
 107          if( getprop( "engines/engine[0]/starter" ) == 1 )
 108                 setprop( "controls/engines/engine[0]/cutoff",0 );
 109 # indicator support
 110  if( getprop( "engines/engine[0]/oil-pressure-psi" ) < 20 )
 111         setprop("tu154/systems/electrical/indicators/engine-1/p-oil", 1.0 );
 112  else setprop("tu154/systems/electrical/indicators/engine-1/p-oil", 0.0 );
 113
 114  if( getprop( "engines/engine[0]/n2" ) < 40 )
 115         setprop("tu154/systems/electrical/indicators/engine-failure-1", 1.0 );
 116  else setprop("tu154/systems/electrical/indicators/engine-failure-1", 0.0 );
 117
 118  if( getprop( "controls/engines/engine[0]/throttle" ) > 0.8 )
 119         setprop("tu154/systems/electrical/indicators/throttle-levers-unlocked", 1.0 );
 120  else setprop("tu154/systems/electrical/indicators/throttle-levers-unlocked", 0.0 );
 121
 122  if( getprop( "engines/engine[0]/n2" ) > 48.5 )
 123                  starter_rpm_1 = getprop( "engines/engine[0]/starter" );
 124  else starter_rpm_1 = 0.0;
 125
 126  setprop("tu154/lamps/hi-starter-rpm", starter_rpm_1 + starter_rpm_2 + starter_rpm_3 );
 127
 128
 129 }
 130
 131 var eng_2_handler = func{
 132 settimer( eng_2_handler, ENGINE_UPDATE_PERIOD );
 133 if( getprop( "controls/engines/engine[1]/cutoff" ) == nil ) return;
 134 if( getprop( "engines/engine[1]/n2" ) == nil ) return;
 135 # EGT delivery to fdm property tree
 136 setprop( "fdm/jsbsim/propulsion/engine[1]/egt-degc",
 137                 getprop( "engines/engine[1]/egt-degf" ) * 0.55 - 17 );
 138
 139 if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return;
 140 var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
 141 if( pwr == nil ) return;
 142 if(  pwr < 13.0 ) return;
 143
 144 if( getprop( "controls/engines/engine[1]/cutoff" ) == 1 )
 145  if( getprop( "engines/engine[1]/n2" ) > 20.0 )
 146       if( getprop( "tu154/switches/startpanel-cold" ) == 1 )
 147          if( getprop( "engines/engine[1]/starter" ) == 1 )
 148                 setprop( "controls/engines/engine[1]/cutoff",0 );
 149 # indicator support
 150  if( getprop( "engines/engine[1]/oil-pressure-psi" ) < 20 )
 151         setprop("tu154/systems/electrical/indicators/engine-2/p-oil", 1.0 );
 152  else setprop("tu154/systems/electrical/indicators/engine-2/p-oil", 0.0 );
 153
 154  if( getprop( "engines/engine[1]/n2" ) < 40 )
 155         setprop("tu154/systems/electrical/indicators/engine-failure-2", 1.0 );
 156  else setprop("tu154/systems/electrical/indicators/engine-failure-2", 0.0 );
 157
 158  if( getprop( "engines/engine[1]/n2" ) > 48.5 )
 159                  starter_rpm_2 = getprop( "engines/engine[1]/starter" );
 160  else starter_rpm_2 = 0.0;
 161
 162 }
 163
 164 var eng_3_handler = func{
 165 settimer( eng_3_handler, ENGINE_UPDATE_PERIOD );
 166
 167 if( getprop( "controls/engines/engine[2]/cutoff" ) == nil ) return;
 168 if( getprop( "engines/engine[2]/n2" ) == nil ) return;
 169 # EGT delivery to fdm property tree
 170 setprop( "fdm/jsbsim/propulsion/engine[2]/egt-degc",
 171                 getprop( "engines/engine[2]/egt-degf" ) * 0.55 - 17 );
 172
 173 if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return;
 174 var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
 175 if( pwr == nil ) return;
 176 if(  pwr < 13.0 ) return;
 177
 178 if( getprop( "controls/engines/engine[2]/cutoff" ) == 1 )
 179    if( getprop( "engines/engine[2]/n2" ) > 20.0 )
 180          if( getprop( "engines/engine[2]/starter" ) == 1 )
 181                 setprop( "controls/engines/engine[2]/cutoff",0 );
 182 # indicator support
 183  if( getprop( "engines/engine[2]/oil-pressure-psi" ) < 20 )
 184         setprop("tu154/systems/electrical/indicators/engine-3/p-oil", 1.0 );
 185  else setprop("tu154/systems/electrical/indicators/engine-3/p-oil", 0.0 );
 186
 187  if( getprop( "engines/engine[2]/n2" ) < 40 )
 188         setprop("tu154/systems/electrical/indicators/engine-failure-3", 1.0 );
 189  else setprop("tu154/systems/electrical/indicators/engine-failure-3", 0.0 );
 190
 191  if( getprop( "engines/engine[2]/n2" ) > 48.5 )
 192                  starter_rpm_3 = getprop( "engines/engine[2]/starter" );
 193  else starter_rpm_3 = 0.0;
 194
 195
 196 }
 197
 198 var apu_handler = func{
 199 settimer( apu_handler, ENGINE_UPDATE_PERIOD );
 200 var param = 0.0;
 201 if( getprop( "controls/engines/engine[3]/cutoff" ) == nil ) return;
 202 if( getprop( "engines/engine[3]/n2" ) == nil ) return;
 203 var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
 204 if( pwr == nil ) return;
 205 # stop APU if 27 V failure
 206 if(  (pwr < 13.0) or (getprop( "tu154/switches/APU-starter-switch" ) != 1 ) )
 207         {
 208         setprop("tu154/systems/electrical/indicators/apu-ready", 0.0 );
 209         setprop("tu154/systems/electrical/indicators/apu-oil-pressure", 0.0 );
 210         setprop("tu154/systems/electrical/indicators/apu-fuel-pressure", 0.0 );
 211         setprop("tu154/systems/electrical/indicators/apu-start", 0.0 );
 212         setprop("tu154/systems/electrical/indicators/apu-levers-open", 0.0 );
 213         setprop("tu154/systems/electrical/indicators/apu-ready-to-start", 0.0 );
 214         setprop( "controls/engines/engine[3]/cutoff",1 );
 215         return;
 216         }
 217
 218 if( getprop( "controls/engines/engine[3]/cutoff" ) == 1 )
 219  if( getprop( "engines/engine[3]/n2" ) > 20.0 )
 220       if( getprop( "tu154/switches/APU-starter-selector" ) == 1 )
 221          if( getprop( "engines/engine[3]/starter" ) == 1 )
 222                 setprop( "controls/engines/engine[3]/cutoff",0 );
 223 # indicator support
 224   if( getprop( "engines/engine[3]/oil-pressure-psi" ) < 20 )
 225         setprop("tu154/systems/electrical/indicators/apu-oil-pressure", 1.0 );
 226   else setprop("tu154/systems/electrical/indicators/apu-oil-pressure", 0.0 );
 227
 228   param = 0.0;
 229
 230   if( getprop( "tu154/systems/APU/APU-damper" ) > 0.95 )
 231         setprop("tu154/systems/electrical/indicators/apu-levers-open", 1.0 );
 232   else setprop("tu154/systems/electrical/indicators/apu-levers-open", 0.0 );
 233   if( getprop( "tu154/systems/electrical/indicators/apu-levers-open" ) == 1.0 )
 234         param = param + 1;
 235    if( getprop( "tu154/systems/electrical/indicators/apu-fuel-pressure" ) == 1.0 )
 236         param = param + 1;
 237     if( getprop( "tu154/systems/APU/APU-bleed" ) < 4.8 )
 238         param = param + 1;
 239  if( param == 3.0 )
 240         setprop("tu154/systems/electrical/indicators/apu-ready-to-start", 1.0 );
 241  else setprop("tu154/systems/electrical/indicators/apu-ready-to-start", 0.0 );
 242
 243   if( getprop( "engines/engine[3]/n2" ) > 90.0 )
 244         {
 245         setprop("tu154/systems/APU/APU-ready", 1.0 );
 246         setprop("tu154/systems/electrical/indicators/apu-ready", 1.0 );
 247         setprop("tu154/systems/electrical/indicators/apu-start", 0.0 );
 248         }
 249   else {
 250         setprop("tu154/systems/APU/APU-ready", 0.0 );
 251         setprop("tu154/systems/electrical/indicators/apu-ready", 0.0 );
 252         }
 253
 254 if( getprop( "engines/engine[3]/n2" ) > 90.0 and getprop( "tu154/systems/electrical/indicators/apu-fuel-pressure") < 0.2 ) stop_apu();
 255
 256 }
 257
 258 var check_lamps_eng = func{
 259         var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
 260         if( pwr == nil ) return;
 261         var param = getprop( "tu154/systems/electrical/checking-lamps/engine-panel" );
 262         if( param == nil ) param = 0.0;
 263         if(  pwr < 13.0 ) param = 0.0;
 264         setprop("tu154/systems/electrical/indicators/autothrottle-on", param );
 265         setprop("tu154/systems/electrical/indicators/throttle-levers-unlocked", param );
 266         setprop("tu154/systems/electrical/indicators/engine-1/egt-danger", param );
 267         setprop("tu154/systems/electrical/indicators/engine-1/egt-stop", param );
 268         setprop("tu154/systems/electrical/indicators/engine-1/filter-clog", param );
 269         setprop("tu154/systems/electrical/indicators/engine-1/low-oil", param );
 270         setprop("tu154/systems/electrical/indicators/engine-1/metal-in-oil", param );
 271         setprop("tu154/systems/electrical/indicators/engine-1/overflow-oil", param );
 272         setprop("tu154/systems/electrical/indicators/engine-1/p-fuel", param );
 273         setprop("tu154/systems/electrical/indicators/engine-1/p-oil", param );
 274         setprop("tu154/systems/electrical/indicators/engine-1/revers-dampers", param );
 275         setprop("tu154/systems/electrical/indicators/engine-1/revers-lock", param );
 276         setprop("tu154/systems/electrical/indicators/engine-1/t-bearing-danger", param );
 277         setprop("tu154/systems/electrical/indicators/engine-1/vibration", param );
 278         setprop("tu154/systems/electrical/indicators/engine-2/egt-danger", param );
 279         setprop("tu154/systems/electrical/indicators/engine-2/egt-stop", param );
 280         setprop("tu154/systems/electrical/indicators/engine-2/filter-clog", param );
 281         setprop("tu154/systems/electrical/indicators/engine-2/low-oil", param );
 282         setprop("tu154/systems/electrical/indicators/engine-2/metal-in-oil", param );
 283         setprop("tu154/systems/electrical/indicators/engine-2/overflow-oil", param );
 284         setprop("tu154/systems/electrical/indicators/engine-2/p-fuel", param );
 285         setprop("tu154/systems/electrical/indicators/engine-2/p-oil", param );
 286         setprop("tu154/systems/electrical/indicators/engine-2/t-bearing-danger", param );
 287         setprop("tu154/systems/electrical/indicators/engine-2/vibration", param );
 288         setprop("tu154/systems/electrical/indicators/engine-3/egt-danger", param );
 289         setprop("tu154/systems/electrical/indicators/engine-3/egt-stop", param );
 290         setprop("tu154/systems/electrical/indicators/engine-3/filter-clog", param );
 291         setprop("tu154/systems/electrical/indicators/engine-3/low-oil", param );
 292         setprop("tu154/systems/electrical/indicators/engine-3/metal-in-oil", param );
 293         setprop("tu154/systems/electrical/indicators/engine-3/overflow-oil", param );
 294         setprop("tu154/systems/electrical/indicators/engine-3/p-fuel", param );
 295         setprop("tu154/systems/electrical/indicators/engine-3/p-oil", param );
 296         setprop("tu154/systems/electrical/indicators/engine-3/revers-dampers", param );
 297         setprop("tu154/systems/electrical/indicators/engine-3/revers-lock", param );
 298         setprop("tu154/systems/electrical/indicators/engine-3/t-bearing-danger", param );
 299         setprop("tu154/systems/electrical/indicators/engine-3/vibration", param );
 300 }
 301
 302 eng_1_handler();
 303 eng_2_handler();
 304 eng_3_handler();
 305 apu_handler();
 306
 307 print("Engines support started");