subs17, I'm a former A4G pilot a very long time ago now (some 35 years) so I know how the RAT (Ram Air Turbine) emergency generator is used. I won't have access to the KAHU version of NATOPS (pilot flight manual) for various reasons - one being the aircraft is still so highly classified that it cannot be sold to a third party even to this day. As you say the KAHUs remain 'wrapped in plastic' (think "Twin Peaks") outside in the weather in New Zealand - unsold. However there are several variations (in quality only) of the A4E/F/G/K (the KAHU was an A4K before being modified) NATOPS at FileFront. The best quality PDF (135Mb) of my actual NATOPS manual (with A4G extra pages) is at:
http://files.filefront.com/A4Gnatops692ppBestQualitypdf/;11720369;/fileinfo.htmlLook on this page for other variations including the PCL (Pocket Check List):
http://hosted.filefront.com/SpazSinbad/page2Anyway after all that you can find the relevant RAT pages explaining that it is manually activated but it knocks out a lot of electrics in operation. Of course it is necessary when there is no engine for an engine restart. However it is tested but deployed just before landing because it is such a hassle to use (for a test). Really just having the RAT deployed serves no purpose for Fsim use. Anyway I'm not the modeller so I can only offer my opinions about how the KAHU will turn out in FSX.
Even in use for test deploying the RAT (with the large yellow black striped handle under & slightly outboard of the HOOK handle on the right side of cockpit) things could go wrong if the pilot mistakenly pulled the 'CANOPY JETTISON HANDLE' (aft both handles mentioned) which was more difficult to reach. This happened to an ex-A4G when in service with the RNZAF. Pilot landed OK without canopy and aircraft repaired. [See Graphic attached.]
The FSX KAHU HUD as seen in the videos at FileFront is excellent and modelled as close as possible (with all the button functions on the keypad underneath) to the real thing. Yes the radar is an F-16 model. You can GOOGLE for info about it online. From Wikipedia here is a synopsis: "Westinghouse AN/APG-66 radar optimized for maritime tracking, HOTAS controls and a 'glass' cockpit (2 large CRT screens), MIL-STD 1553B databus; Litton LN-93 inertial navigation system, Ferranti 4510 wide-angle HUD, the Vinten airborne video recording system, the General Instruments ALR-66 radar warning receiver, and a Tracor ALR-39 chaff/flare dispenser." & here is info about the radar:
http://www.scramble.nl/wiki/index.php?title=Northrop_Grumman_(Westinghouse)_AN/APG-66[attachment deleted by admin]