Scenario: Spoilers are armed and plane touches down. The spoilers extend automatically. The throttle is advanced a bit later either to taxi or to abort the landing.Does anyone know what triggers the automatic retraction of the spoilers after landing when the power is re-applied? Is there an offset that controls this behaviour or is that logic built-in the main FS program? If there is no offset for this, how does the program know that the throttle has been advanced? In a real throttle, there may be a switch to indicate that, but this is not required in FS. So, there must be a way for FS to know that the throttle has been advanced & that the spoilers need to be retracted.I am asking because in the 737 throttle assembly I built, I incorporated a servo motor to extend the spoilers after touch down. This works perfectly and the spoilers used to retract as well when I re-applied the power. But now, for some reason, the retraction is intermittent. Sometime it works and sometimes not and this is happening now that I'm using Project Magenta software. With the default FS9 software, everything works as it should, but it seems that PM may be affecting this functionality in some way.Does anyone have any ideas/suggestions about this?Thanks,

Hi Maurice,FS9 has some very peculiar behaviour w.r.t. to spoilers when on the ground. Especially when "arming" them.Now, when you "arm" the spoilers during final approach, the spoilers will extend automatically when you touchdown, provided the .air file has the "auto-deploy" parameter set.But, when you throttle up after touchdown, FS9 itself will NOT retract the spoilers itself. (there may, however, be a gauge that does this). But a default aircraft surely will not.However, if you "arm" the spoilers again after touchdown (with throttles idle), nothing will happen (i.e. the spoilers will remain extended). BUT: if you now throttle up, the spoilers WILL be retracted auomatically. So what seems to be happening, is that "something" causes the spoilers to be armed again after touchdown.I don't frequently visit this forum, so if you want to know more, sent me a PM.Cheers, Rob Barendregt