Add overspeed PFD warning for the landing gear

Nasal/FMGC/FMGC.nas

@@ -266,6 +266,8 @@ var masterFMGC = maketimer(0.2, func {
 	
 	if (getprop("/systems/navigation/adr/computation/overspeed-vfe-spd") != 1024) {
 		setprop("/FMGC/internal/maxspeed", getprop("/systems/navigation/adr/computation/overspeed-vfe-spd") - 4);
+	} elsif (getprop("/systems/navigation/adr/computation/overspeed-vle")) {
+		setprop("/FMGC/internal/maxspeed", 284);
 	} else {
 		setprop("/FMGC/internal/maxspeed", getprop("/it-fbw/speeds/vmo-mmo"));
 	}

Nasal/Systems/APU.nas

@@ -0,0 +1,67 @@
+# A3XX Auxilliary Power Unit
+# Jonathan Redpath (legoboyvdlp)
+
+# Copyright (c) 2019 Jonathan Redpath (legoboyvdlp)
+
+var APU = {
+	state: 0, # power up, watch, starting, run, cooldown, shutdown
+	nRpm: 0,
+	fuelValve: aircraft.door.new("/controls/apu/fuel-valve", 1),
+	inletFlap: aircraft.door.new("/controls/apu/inlet-flap", 12),
+	listenSignals: 0,
+	start: 0,
+	cancelCheckFlap: 0,
+	new: func() {
+		var a = { parents:[APU] };
+		return a;
+	},
+	setState: func(num) {
+		me.state = num;
+	},
+	powerOn: func() {
+		# apu able to receive emergency stop or start signals
+		me.fuelValve.open();
+		me.inletFlap.open();
+		me.listenSignals = 1;
+		settimer(me.setState(1), 3);
+	},
+	getStartSignal: func() {
+		if (me.listenSignals and me.state < 2 and me.nRpm < 7) {
+			me.start = 1;
+			me.startCheckFlap();
+		} elsif (me.listenSignals) {
+			settimer(me.getStartSignal(), 0);
+		}
+	},
+	startCheckFlap: func() {
+		if (me.inletFlap.getpos() != 1 and me.cancelCheckFlap == 0 and me.state == 1) {
+			settimer(me.startCheckFlap(), 0);
+		} elsif (me.cancelCheckFlap) {
+			me.cancelCheckFlap = 0;
+		} else {
+			me.setState(2);
+		}
+	},
+	getStopSignal: func() {
+		if (me.listenSignals) {
+			me.cancelCheckFlap = 1;
+			me.inletFlap.close();
+			# wait for flap close --> power down relay output
+		}
+	},
+};
+
+var APUController = {
+	_init: 0,
+	APU: nil,
+	init: func() {
+		if (!me._init) {
+			me.APU = APU.new();
+		}
+	},
+	loop: func() {
+		if (me.APU != nil) {
+			APU.update();
+		}
+	},
+};