Hello,One little question I want to ask, will the rudder and aileron control surfaces drop after I turn off the hydraulic system in real NG? In NGX, it seems that they remain still.

I can be wrong, but AFAIK, the control surfaces in the real NG stay still with no hydraulics, just like the NGX. It's been a while since I flew it, but IIRC when you move the yoke with no hydraulics, the trim tabs on the elevators and ailerons are the only things you will see moving.

Hello,One little question I want to ask, will the rudder and aileron control surfaces drop after I turn off the hydraulic system in real NG? In NGX, it seems that they remain still.

The Aileron control surface will not drop due to the fact that the Hydraulic Aileron PCU's are not directly connected to the aileron control surface's, but are connected by control cables that run's from the Left main wheel well where the Aileron PCU's are installed to the Aileron control surface's.The only flight control surface that drop's when hydraulic power is removed are the spoilers when they are up. Because they are directly connected to a hydraulic actuator.

"Just like on the NGX"...It is one of the reason of why I posted a lot of time about the wrong simulation of the manual reversion on the NGX...A lot of people assumed that the flight controls will not move without hydraulics because on the PMDG it works in this way.As stated in the previous post, the 737 (ALL MODELS already in production) including the NG have the primary control surfaces moved by cables by the control yoke in the cockpit, the hydraulic actuators simply acts to reduce force for the pilots and A/P.The only hydraulic powered and operated surface is the rudder.

Andrea, do you think that things have improved with SP1b? I tried doing a manual reversion yesterday and it seems to me that the surfaces have a slightly wider deflection, enough to be able someway to control the airplane. On the other end, if the deflection was wider, nothing would change with respect to the powered control. I think the developers did this way intentionally, so that one could feel how hard it is to move the surfaces with the yoke without hydraulic power.

I'll test again in flight, however in SP1b pmdg fixed (in part) the flight control surface deflection in visual model, but noting changed in flight dynamics.So, I'll test and report soon.Probably pmdg tried to let us feel how hard is to control in manual reversion, but then a lot of people will misunderstand as it is happening now.This is not the first time I hear this, when you have a plane that is rated to be close to the real thing, when you see the sim acting at a certain way, you assume that also the real acts at the same way, or close to it.

"Just like on the NGX"...It is one of the reason of why I posted a lot of time about the wrong simulation of the manual reversion on the NGX...A lot of people assumed that the flight controls will not move without hydraulics because on the PMDG it works in this way.

I feel your pain. I have been in a situation when people told me something was so-and-so because PMDG modelled it that way, and when telling then no it wasnt they accused me of ignorance and told me to learn who PMDG was. I had to quote Boeing to convince them NGX was not always 100% real.On a side note, with PMDG/Boeing partnership, I wonder if it could be interesting if it would be possible/of interest for PMDG and Boeing to certify the NGX as a certified training device in the way of cockpit orientation trainer/procedure trainer. That would be a huge marketing boost I believe. There is already one FS add-on that is certified by OEM in this way.

Tried and confirmed that nothing changed except for visual model.However, with a lot of practice and only if electrical power is still avaiable, it is possible to land the aircraft with a total hydraulic A&B failure....Except for another thing...No manual LG extension, tried SHIFT + G, tried all, but nothing.I remember an old post about it and it seems to be a limitation of the sim, but it is strange...PS: Obviously, with flaps electrically out, the landing was a bit loud due to the aural warning... :(

there is a switch by the copilots knee. That will silence the warning.

Flaps were more than 25 so the cut out switch is useless ;)

RW, if there's a tailwind and the hydraulics are not powered, the rudder pedals and yoke will move with the wind. I don't think I've seen the yoke roll, but it definitely will flop into your lap. It's quite annoying, especially if the CA thinks the world will come to an end if you turn on a pump before push. . .

Andrea, I am not talking about the cutout button but the master GPWS Gear Inhibit switch.FCOM page 15.10.8

The "too low gear" is the less annoying thing... the continous horn is terrible if you know that you are landing without gears...Maybe a simulation of an aural warn. Circuit breaker could help lol !Ops, I found another stupid thing, useless for the simulation, but is there... The circuit breaker panel P6-3 is missing, the texture shows the P6-4 circuit breaker panel 2 times, on the p6-3 position and also on p6-4, so, there is no aural warning circuit breaker. No way to silence it, no way to extend geaars manually, so, we must suffer for a bad day landing :(

Oh, it does not do away with that too? My bad then.

All the warnings like the take off warning, the gear warnings and the fire bell come from the aural warning module.GPWS voices are separate things.However you're rigt about the horn cutout switch for aural warning that is near the copilot left leg, so you are not completely wrong. :)