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This was between my first and second release. It wasn't fully tested, and it's only for the curious. It suggests a potentially more effectient way of implementing auto speedbrakes, relative to what FG uses now. As best I understand, the current version checks for landing every 0.2s.

This was in two files, as marked.

The CDATA is just for XHTML compliance, not part of the script <![CDATA[ # FILE 1 of 2 - BEGIN # Nasal script for FlightGear (2.10.0.3, although it should work in 2.8.0.5 and maybe earlier) # by Kwynn Buess # this is to assist with landing drills--this automatically "presses" the many buttons you need before landing # I discuss in detail on my web site at kwynn.com # THIS VERSION HAS BEEN SUPERCEDED. IT'S IS ONLY FOR THE CURIOUS # print("Kwynn landing drill script v0.2.5, 2013/04/06 11:23pm EDT"); var getPropNode = func(prop) { return props.globals.getNode(prop,1); } var mySet = func(prop, val) { var prop = getPropNode(prop); prop.setValue(val); } var getVal = func(prop) { var prop = getPropNode(prop); return prop.getValue(); } var ATT = 130; var ATL = nil; var sbSet = 0; var initOnce = func { # print( "init once" ); mySet("/controls/flight/flaps",1); mySet("/controls/gear/gear-down", 1); mySet("/controls/flight/speedbrake-lever",1); mySet("/instrumentation/afds/inputs/AP",0); mySet("/instrumentation/afds/inputs/AP-disengage",1); mySet("/instrumentation/afds/inputs/FD",1); mySet("/autopilot/autobrake/step",1); mySet("/instrumentation/efis/mfd/mode-num",0); mySet("/instrumentation/afds/inputs/autothrottle-index",5); } var kwynnAT = func { var at = getVal("/instrumentation/afds/inputs/autothrottle-index"); # print("ati = " ~ at); if (at == 0) { # mySet("/instrumentation/afds/inputs/at-armed" ,0); # mySet("/instrumentation/afds/inputs/at-armed[1]",0); if (ATL != nil) removelistener(ATL); ATL = nil; } if (at == 2) mySet("/instrumentation/afds/inputs/autothrottle-index",5); } var sbDo = func { var sb = getVal("/controls/flight/speedbrake"); var speed = getVal("/instrumentation/airspeed-indicator/indicated-speed-kt"); print ("a.nas sb = " ~ sb); if ( ((sb == 1) or (sbSet == 1)) and (speed > 85) ) { sbSet = 1; mySet("/controls/flight/speedbrake",1); } var agl = getVal("/position/gear-agl-ft"); if ((speed <= 85) and (agl <= 0)) { sbSet = 0; mySet("/controls/flight/speedbrake",0); } if (getVal("/sim/replay/replay-state") == 1) { if (sbL != nil) removelistener(sbL); sbL = nil; } } var reinitL = nil; var replayL = nil; var sbL = nil; var frameL = nil; var frameCount = 0; var replayState = 0; var frame = func { frameCount = frameCount + 1; if (frameCount > 2) { if ( (frameCount != 8) and (frameCount != 18) and (frameCount != 35) and (frameCount != 50) ) return; } var cur = getVal("/autopilot/settings/target-speed-kt"); # if (cur != nil) print(frameCount ~ " AT = " ~ cur); if ((cur == ATT) and (frameL != nil) and (frameCount > 30)) { removelistener(frameL); frameL = nil; } doSettings(); } var kwynnReInit = func(from) { initOnce(); frameCount = 0; if (frameL == nil) frameL = setlistener("/sim/signals/frame", frame, 1, 1); } var doSettings = func { mySet("/sim/rendering/glide-slope-tunnel",1); mySet("/sim/fuel-fraction",0.065); mySet("/controls/gear/gear-down", 1); mySet("/autopilot/settings/target-speed-kt", 130); mySet("/instrumentation/afds/inputs/lateral-index",4); mySet("/instrumentation/afds/inputs/vertical-index",6); sbSet = 0; activate2ndL(); } var activate2ndL = func { if (ATL == nil) ATL = setlistener("/instrumentation/afds/inputs/autothrottle-index", kwynnAT, 1, 1); if (sbL == nil) sbL = setlistener("/controls/flight/speedbrake", sbDo, 1, 1); } if (reinitL == nil) reinitL = setlistener("/sim/signals/reinit", kwynnReInit, 1,1); # # # ******************** END FILE 1 **************************** # # # ******** BEGIN WHAT MUST BE A SEPARATE FILE ************ var getPropNode = func(prop) { return props.globals.getNode(prop,1); } var mySet = func(prop, val) { var prop = getPropNode(prop); prop.setValue(val); } var getVal = func(prop) { var prop = getPropNode(prop); return prop.getValue(); } var sbSet = 0; print("b 8:26pm"); var watchSB = func { if ((getVal("/position/gear-agl-ft") <= 0) and (sbSet == 0)) { print("sb deploy / up"); mySet("/controls/flight/speedbrake",1); sbSet = 1; } } var setTime = func { print("Kwynn setTime"); if (sbSet == 1) return; watchSB(); var agl = getVal("/position/gear-agl-ft"); var nextCheck = 4; var tti = 1; var dv = getVal("/velocities/speed-down-fps"); if (dv == 0) nextCheck = 0.1; else { tti = agl / dv; nextCheck = tti * 0.6; } if (nextCheck > 4) nextCheck = 4; if (nextCheck < 0.1) nextCheck = 0.1; print("next Check = " ~ nextCheck); settimer(setTime, nextCheck); } var sbDo = func { var sb = getVal("/controls/flight/speedbrake"); var speed = getVal("/instrumentation/airspeed-indicator/indicated-speed-kt"); print ("b.nas sb = " ~ sb); if ( ((sb == 1) or (sbSet == 1)) and (speed > 85) ) { sbSet = 1; mySet("/controls/flight/speedbrake",1); } var agl = getVal("/position/gear-agl-ft"); if ((speed <= 85) and (agl <= 0)) { sbSet = 0; mySet("/controls/flight/speedbrake",0); } if (getVal("/sim/replay/replay-state") == 1) { if (sbL != nil) removelistener(sbL); sbL = nil; } } var reset = func { if (sbL == nil) sbL = setlistener("/controls/flight/speedbrake", sbDo, 1, 1); sbSet = 0; settimer(setTime, 4); } var resetL = nil; var sbL = nil; if (resetL == nil) resetL = setlistener("/sim/signals/reinit", reset, 1,1); # END SECOND FILE ********** # THE FOLLOWING IS THE END OF THE CDATA, NOT PART OF THE SCRIPT ]]>