togglereverser = func {
r1 = "/fdm/jsbsim/propulsion/engine";
r2 = "/fdm/jsbsim/propulsion/engine[1]";
r3 = "/controls/engines/engine"; 
r4 = "/controls/engines/engine[1]"; 
r5 = "/sim/input/selected";
rv1 = "/engines/engine/reverser-pos-norm"; 
rv2 = "/engines/engine[1]/reverser-pos-norm"; 

val = getprop(rv1);
if (val == 0 or val == nil) {
interpolate(rv1, 1.0, 1.4); 
interpolate(rv2, 1.0, 1.4);  
setprop(r1,"reverser-angle-rad","1.7");
setprop(r2,"reverser-angle-rad","1.7");
setprop(r3,"reverser", "true");
setprop(r4,"reverser", "true");
setprop(r5,"engine", "true");
setprop(r5,"engine[1]", "true");
} else {
if (val == 1.0){
interpolate(rv1, 0.0, 1.4);
interpolate(rv2, 0.0, 1.4);   
setprop(r1,"reverser-angle-rad",0);
setprop(r2,"reverser-angle-rad",0);
setprop(r3,"reverser",0);
setprop(r4,"reverser",0);
setprop(r5,"engine", "true");
setprop(r5,"engine[1]", "true");

  }
 }
}