I do not much about it .. except for the video I seen.

 

And, I just Googled "737NG idle reverse" and there are technical discussions about it and its / use /relation to stopping distance with various autobrake settings..

Some pilots mention never using full revers .. very often. Mostly idle reverse (specific range / like 21% to 25%N1) it was.

You say you do not know much about it but tell others who do understand the system they are wrong.

 

You have clearly misunderstood what those pilots you googled were saying. Pilots often use reverse idle after landing. But that does not mean the reverser indication is amber in that case. You only have that FSX 737NG video to back that idea up. The amber and green indication shows the position of the reverser, not the amount of reverse thrust.

 

If you move the thrust levers to reverse idle the thrust reversers deploy fully. They do not stop at an intermediate position.

As long as you keep %N1 21-24 it stays in idle reverse (amber) .. until you select full  full reverse.

If you shift your car in reverse, it still says "R" on the gear select, regardless of what your gas pedal is doing.  The amber Reverse just means "I'm moving to R" and green means "I'm in R."

I just did a short video to show (help explain) idle reverse as I mentioned in the previous posts..
Used during landing when full reverse is not needed.



 

Yeah, that's not how it works RW. You can't move the levers above the interlock until the light is green.

 

I don't know if that's a bug or not, but it's not right.

You say you do not know much about it but tell others who do understand the system they are wrong.

 

You have clearly misunderstood what those pilots you googled were saying. Pilots often use reverse idle after landing. But that does not mean the reverser indication is amber in that case. You only have that FSX 737NG video to back that idea up. The amber and green indication shows the position of the reverser, not the amount of reverse thrust.

 

If you move the thrust levers to reverse idle the thrust reversers deploy fully. They do not stop at an intermediate position.

 

Ok,

I did a video to show the idle reverse .. (above posted).

Ok,

I did a video to show the idle reverse .. (above posted).

Which proves what exactly? On my NGX one touch on F2, or one click on the lever with the mouse, brings the levers up sufficiently to trigger thrust reverser deployment. The reverser opens fully (REV goes amber then green).  Meanwhile N1 hasn't increased at all. It's still about 20.7% at ISA sea level static (it would be more during the ground roll).  As far as I can tell PMDG have got this right, it works just like the aircraft.

 

In the real 737NG, nothing much happens as you raise the thrust reverse levers slowly to the interlock position, as you did in your video. Unlike your video, in the real world N1 does not increase and the reverser does not operate.  Just before you get to the interlock position a microswitch closes and the reverser hydraulic system is pressurised to unlock and deploy the reverser.  If you hold the levers in this position against the interlock the reverser fully deploys (REV green). At that point the interlock is removed and you can then increase N1 and therefore reverse thrust by raising the levers further.  If however you leave the reverse thrust levers there you are in reverse idle, with idle N1 and REV indication green. If the REV indication remains amber something is wrong.

 

You've got a bit of a cheek using video of another 737NG sim in PMDG's support forum in an attempt to show the NGX is incorrect.  Not only that you are telling people with real world experience who know very well how the aircraft works they are wrong too, purely because you are convinced your NG sim is correct. Instead of continuing to argue here using faulty understanding of what the REV indications mean, I would suggest raising a support question to the developers of your 737NG sim and tell them it's not working correctly in this condition. 

Yea, that other product is not exactly the landmark of faithful reproduction of the NG. It's good for what it is, but trying to use it as a benchmark for NGX is... well... nevermind.

 

The final authority to say whether the NGX is right or wrong is the FCOM, and not much else. In this case, the NGX is right: reversers cannot be selected past the first detent while the sleeves are in transit, ie when REV is annunciated amber.

Yes, except he goes further and claims that in reverse idle the REV indication is meant to stay amber.

 

My guess is that in that sim in that condition the reverser hasn't moved at all, and they show REV amber to represent a disagreement condition with the lever. Still not correct to the aircraft but it would explain the indications.

In the real plane the amber REV indication can be though of as a Not In Position Selected (NIPS) indication. It means that you have either commanded the reverser sleeves to the reverse position and they are not there or you have commanded the sleeves to the stow position and they are not there. Nothing more than idle thrust can be commanded while the reverser sleeves are moving to the reverse position. Once they are in the reverse position the REV indications turn green and only then can you increase the thrust. The behavior in the video is not how the real airplane works.