I'm not seeing any NaN issues with the TU154b. Though I'm not able to start it - well, not within 10 minutes at least. :) There is a minor issue with incorrect property name though. I've attached a patch. Anyone in contact with the TU154b designers? There's no email in the README. Maybe s.o. can forward the patch.
cheers, Thorsten
--- a/TU154B/engines.nas 2009-05-14 21:11:09.000000000 +0200 +++ b/TU154B/engines.nas 2011-01-09 17:42:10.000000000 +0100 @@ -86,7 +86,7 @@ var eng_1_handler = func{ settimer( eng_1_handler, ENGINE_UPDATE_PERIOD ); -if( getprop( "engines/engine[0]/egt_degf" ) == nil ) return; +if( getprop( "engines/engine[0]/egt-degf" ) == nil ) return; if( getprop( "controls/engines/engine[0]/cutoff" ) == nil ) return; if( getprop( "engines/engine[0]/n2" ) == nil ) return; var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts"); @@ -96,7 +96,7 @@ # EGT delivery to fdm property tree setprop( "fdm/jsbsim/propulsion/engine[0]/egt-degc", - getprop( "engines/engine[0]/egt_degf" ) * 0.55 - 17 ); + getprop( "engines/engine[0]/egt-degf" ) * 0.55 - 17 ); if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return; @@ -134,7 +134,7 @@ if( getprop( "engines/engine[1]/n2" ) == nil ) return; # EGT delivery to fdm property tree setprop( "fdm/jsbsim/propulsion/engine[1]/egt-degc", - getprop( "engines/engine[1]/egt_degf" ) * 0.55 - 17 ); + getprop( "engines/engine[1]/egt-degf" ) * 0.55 - 17 ); if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return; var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts"); @@ -168,7 +168,7 @@ if( getprop( "engines/engine[2]/n2" ) == nil ) return; # EGT delivery to fdm property tree setprop( "fdm/jsbsim/propulsion/engine[2]/egt-degc", - getprop( "engines/engine[2]/egt_degf" ) * 0.55 - 17 ); + getprop( "engines/engine[2]/egt-degf" ) * 0.55 - 17 ); if( getprop( "tu154/switches/startpanel-cold" ) == nil ) return; var pwr = getprop("tu154/systems/electrical/buses/DC27-bus-L/volts");
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