Try to beat this for stupidity! In a situation that I had saved I thought the engines were running, so once it was loaded I just slammed the throttles. Ouch! Parking brake set and flaps zero... And not only that, the engines weren't even running! The only thing that happened was that an intermittent horn started to complain of my piloting skills :-)Now, in a previous post I mentioned that in cases where I would expect the take off configuration warning to come on, I could sometimes hear one short tone, nothing more. In this case, with the engines NOT running, I did hear what I think is the take off configuration warning.Out of curiosity I just tried it with one engine running, the sound would come on! Two engines running, one short tone at best.So, is it possible that when the engines are running, the sound of the engines spooling up gets in the way of the sound of the horn?Or is it just me?Would someone be so kind as to check this on their machine? Just set the parking brake when you're ready for take-off and slam the throttles, see what happens.Thanks,Leo Bakker

Same result ;-)Andr

"So, is it possible that when the engines are running, the sound of the engines spooling up gets in the way of the sound of the horn?"Does it interfere in PIC, too, Leo? I don't know if this is an option or not, but warnings of this nature (including A/P disconnect) usually go on long and loud until the pilots have taken corrective action. MSFS users have it way too easy ;-) Some warnings are extremely loud and persistent.... and indentifying the source and finding the correct reset switch/method takes time , especially if you are not familiar with the aircraft type (the noise doesn't help your concentration/memory any, either!).Some Boeings don't need to see the engines running before they trigger the config warnings. E.g. the 747 Classic. Others do. The T/O config warnings on the 737NG appear to be generated by simple microswitches on the thrust lever mechanism (i.e. at 20 degrees thrust lever angle, a switch (or two) is made... and this sends a signal to the warning computer). On the 747-400, I recall that actual engine rpms need to be seen.Anyway, if I remember, I'll try pushing the levers forward at the gate to see what happens. I recall on the Classic 737, the warnings are triggered with the engines off.Cheers.Ian.

Hi guys,Thanks for trying, Andre. So it's not a matter of me having the wrong sound card, I guess.And Ian, just checked in PIC767. What happens with engines not running is nothing at all. With the engines running I get three tones by the time the engines have spooled up to about 90 % N1, so they're fairly loud already. And since there is also a warning light in the 767, I think these three sounds are all I'm supposed to hear and this time, the engine noise is not "in the way", as it were.I get the impression that what I thought was a bug is not, that is, in the 737NG the warning SHOULD come on even with the engines off.On the other hand, it would be nice if the sound could also be heard if the engines ARE running. Could prevent some nasty things inadvertently happening to my lovely PMDG Boeing :-)Leo Bakker

"And Ian, just checked in PIC767. What happens with engines not running is nothing at all."I just checked my 767 notes and this is correct, Leo. The T/O Config Warning Module in the Warning Electronics Unit needs to see either engine's N1 actually at 66.7% (no position switches on the thrust lever mechanism as in the case of the 737)."With the engines running I get three tones by the time the engines have spooled up to about 90 % N1, so they're fairly loud already."On the real 767, the siren will continue indefinitely (you can only cancel the Master Warning Lights, not the sound). The 767 config warning is extremely loud and irritating on our aircraft (the PIC aurals are very tame by comparison). When we do an EICAS display test it is triggered. A while back, I tried to record them, but I got too much distortion. The aurals should cancel at liftoff, or if you correct the faulty config or pull back on the throttles.Still looking into the 737 aurals....Cheers.Ian.