231 lines
8.1 KiB
Text
231 lines
8.1 KiB
Text
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# Manages the engine
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#
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# Fuel system: based on the Spitfire. Manages primer and negGCutoff
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# Hobbs meter
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# =============================== DEFINITIONS ===========================================
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# set the update period
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var UPDATE_PERIOD = 0.3;
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# =============================== Hobbs meter =======================================
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# this property is saved by aircraft.timer
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var hobbsmeter_engine_160hp = aircraft.timer.new("/sim/time/hobbs/engine[0]", 60, 1);
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var hobbsmeter_engine_180hp = aircraft.timer.new("/sim/time/hobbs/engine[1]", 60, 1);
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var init_hobbs_meter = func(index, meter) {
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setlistener("/engines/engine[" ~ index ~ "]/running", func {
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if (getprop("/engines/engine[" ~ index ~ "]/running")) {
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meter.start();
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print("Hobbs system started");
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} else {
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meter.stop();
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print("Hobbs system stopped");
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}
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}, 1, 0);
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};
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init_hobbs_meter(0, hobbsmeter_engine_160hp);
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init_hobbs_meter(1, hobbsmeter_engine_180hp);
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setlistener("/sim/time/hobbs/engine[0]", func {
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# in seconds
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var hobbs_160hp = getprop("/sim/time/hobbs/engine[0]") or 0.0;
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var hobbs_180hp = getprop("/sim/time/hobbs/engine[1]") or 0.0;
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# This uses minutes, for testing
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#hobbs = hobbs / 60.0;
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# in hours
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hobbs = (hobbs_160hp + hobbs_180hp) / 3600.0;
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# tenths of hour
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setprop("/instrumentation/hobbs-meter/digits0", math.mod(int(hobbs * 10), 10));
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# rest of digits
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setprop("/instrumentation/hobbs-meter/digits1", math.mod(int(hobbs), 10));
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setprop("/instrumentation/hobbs-meter/digits2", math.mod(int(hobbs / 10), 10));
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setprop("/instrumentation/hobbs-meter/digits3", math.mod(int(hobbs / 100), 10));
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setprop("/instrumentation/hobbs-meter/digits4", math.mod(int(hobbs / 1000), 10));
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}, 1, 0);
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# ========== primer stuff ======================
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# Toggles the state of the primer
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var pumpPrimer = func {
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var push = getprop("/controls/engines/engine/primer-lever") or 0;
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if (push) {
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var pump = getprop("/controls/engines/engine/primer") or 0;
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setprop("/controls/engines/engine/primer", pump + 1);
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setprop("/controls/engines/engine/primer-lever", 0);
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}
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else {
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setprop("/controls/engines/engine/primer-lever", 1);
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}
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};
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# Primes the engine automatically. This function takes several seconds
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var autoPrime = func {
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var p = getprop("/controls/engines/engine/primer") or 0;
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if (p < 3) {
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pumpPrimer();
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settimer(autoPrime, 1);
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}
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};
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# Mixture will be calculated using the primer during 5 seconds AFTER the pilot used the starter
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# This prevents the engine to start just after releasing the starter: the propeller will be running
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# thanks to the electric starter, but carburator has not yet enough mixture
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var primerTimer = maketimer(5, func {
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setprop("/controls/engines/engine/use-primer", 0);
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# Reset the number of times the pilot used the primer only AFTER using the starter
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setprop("/controls/engines/engine/primer", 0);
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print("Primer reset to 0");
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primerTimer.stop();
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});
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# ========== Main loop ======================
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var update = func {
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var leftTankUsable = getprop("/consumables/fuel/tank[0]/selected") and getprop("/consumables/fuel/tank[0]/level-gal_us") > 0;
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var rightTankUsable = getprop("/consumables/fuel/tank[1]/selected") and getprop("/consumables/fuel/tank[1]/level-gal_us") > 0;
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var outOfFuel = !(leftTankUsable or rightTankUsable);
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# We use the mixture to control the engines, so set the mixture
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var usePrimer = getprop("/controls/engines/engine/use-primer") or 0;
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var engine_running = getprop("/engines/current-engine/running");
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if (outOfFuel and (engine_running or usePrimer)) {
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print("Out of fuel!");
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gui.popupTip("Out of fuel!");
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}
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elsif (usePrimer and getprop("/engines/engine/oil-temperature-degf") <= 75) {
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# Mixture is controlled by start conditions
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var primer = getprop("/controls/engines/engine/primer");
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if (!getprop("/fdm/jsbsim/fcs/mixture-primer") and getprop("/controls/switches/starter")) {
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if (primer < 3) {
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print("Use the primer!");
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gui.popupTip("Use the primer!");
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}
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elsif (primer > 6) {
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print("Flooded engine!");
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gui.popupTip("Flooded engine!");
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}
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else {
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print("Check the throttle!");
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gui.popupTip("Check the throttle!");
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}
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}
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}
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};
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var autostart = func (msg=1) {
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if (getprop("/engines/current-engine/running")) {
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if (msg)
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gui.popupTip("Engine already running.", 5);
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return;
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}
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setprop("/controls/switches/magnetos", 3);
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setprop("/controls/engines/current-engine/throttle", 0.2);
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setprop("/controls/engines/current-engine/mixture", 1.0);
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setprop("/controls/switches/master-bat", 1);
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setprop("/controls/switches/master-alt", 1);
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setprop("/controls/switches/master-avionics", 1);
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setprop("/controls/lighting/nav-lights", 1);
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setprop("/controls/lighting/strobe", 1);
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setprop("/controls/lighting/beacon", 1);
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setprop("/consumables/fuel/tank[0]/selected", 1);
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setprop("/consumables/fuel/tank[1]/selected", 1);
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# Set the altimeter
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setprop("/instrumentation/altimeter/setting-inhg", getprop("/environment/pressure-sea-level-inhg"));
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#c172p.autoPrime();
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setprop("/controls/engines/engine/primer", 3);
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if (msg)
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gui.popupTip("Hold down \"s\" to start the engine", 5);
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};
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setlistener("/controls/switches/starter", func {
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if (!getprop("/fdm/jsbsim/complex"))
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autostart(0);
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var v = getprop("/controls/switches/starter") or 0;
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if (v == 0) {
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print("Starter off");
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# notice the starter will be reset after 5 seconds
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primerTimer.restart(5);
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}
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else {
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print("Starter on");
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setprop("/controls/engines/engine/use-primer", 1);
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if (primerTimer.isRunning) {
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primerTimer.stop();
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}
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}
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}, 1, 0);
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# ================================ Initalize ======================================
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# Make sure all needed properties are present and accounted
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# for, and that they have sane default values.
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# =============== Variables ================
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controls.incThrottle = func {
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var delta = arg[1] * controls.THROTTLE_RATE * getprop("/sim/time/delta-realtime-sec");
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var old_value = getprop("/controls/engines/current-engine/throttle");
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var new_value = std.max(0.0, std.min(old_value + delta, 1.0));
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setprop("/controls/engines/current-engine/throttle", new_value);
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};
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controls.throttleMouse = func {
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if (!getprop("/devices/status/mice/mouse[0]/button[1]")) {
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return;
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}
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var delta = cmdarg().getNode("offset").getValue() * -4;
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var old_value = getprop("/controls/engines/current-engine/throttle");
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var new_value = std.max(0.0, std.min(old_value + delta, 1.0));
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setprop("/controls/engines/current-engine/throttle", new_value);
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};
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controls.throttleAxis = func {
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var value = (1 - cmdarg().getNode("setting").getValue()) / 2;
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var new_value = std.max(0.0, std.min(value, 1.0));
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setprop("/controls/engines/current-engine/throttle", new_value);
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};
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controls.adjMixture = func {
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var delta = arg[0] * controls.THROTTLE_RATE * getprop("/sim/time/delta-realtime-sec");
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var old_value = getprop("/controls/engines/current-engine/mixture");
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var new_value = std.max(0.0, std.min(old_value + delta, 1.0));
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setprop("/controls/engines/current-engine/mixture", new_value);
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};
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controls.mixtureAxis = func {
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var value = (1 - cmdarg().getNode("setting").getValue()) / 2;
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var new_value = std.max(0.0, std.min(value, 1.0));
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setprop("/controls/engines/current-engine/mixture", new_value);
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};
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# key 's' calls to this function when it is pressed DOWN even if I overwrite the binding in the -set.xml file!
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# fun fact: the key UP event can be overwriten!
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controls.startEngine = func(v = 1) {
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if (getprop("/engines/current-engine/running"))
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{
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setprop("/controls/switches/starter", 0);
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return;
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}
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else
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setprop("/controls/switches/starter", v);
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};
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setlistener("/sim/signals/fdm-initialized", func {
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var engine_timer = maketimer(UPDATE_PERIOD, func { update(); });
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engine_timer.start();
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});
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