I've said it once, I'll say it again: Leonardo SH MD-82. As someone said earlier, couple that with FS2Crew's marvelous piece of software and you've got a almost fully (and realistically) operating MD-80; that is "as real as it gets", literally.Also, as Chuck said, Aeroworx 200 is also a nice piece of aircraft simulation. I've learned lots from it.PT Tu-154 was too hard for me to take. Name a reason? I don't speak Russian :( ...and I know squat about Russian navigation systems

Addendum:1. Aeroworx B200.I don't know too many people who have not disabled the hot start failure when spooling up the engines. This plus extreme taxi speeds makes this bird one tough prop to fly.2. Flight 1 ATR72-500Although complex at first, it becomes routine until you add FS2Crew to the mix. Personally it added such a level of complexity that I found disabling FS2Crew for the ATR to be more the norm rather than the exception.As for the Tu-154, I think the language barrier is too much of a challenge for me to really want to get into it. It's an exceptional model and probably a dream to fly like all the others (eventually), but I'm still working on mastering other planes to have much room left over.Others have mentioned the Boeing series AC in various flavors. Although at one time I would have agreed with you, I found that if you can master the Wilco PIC 737-300/500, the PMDG 737-600/800 and LD 767 are pretty much the same in their start up procedures (notable exceptions for the 767 of course, but it's not like you're learning a completely new process). I have to hand it to Boeing.. they have lowered the curve when a pilot transitions between their 7 series compared to a pilot that has to migrate from the MD80 to the 737 (as AAL is currently doing IRL).

Most complex for me:1) PT Tu-154: I know nothing of those Russian planes. Absolutely nothing. I still want to learn and master this plane, because I think it's one of the most beautiful planes ever produced, but it'll take some time before I'll get the chance. On the bright side, I have the entire manual printed out and had it bound into a nice booklet.2) Leonardo Maddog: I dare say this plane is as complex as the PT Tu-154, yet it's still less complex. Why? Because the cockpit is in English.Speaking about Russian jets, before I even start with the PT Tu-154, I will first try to master the SD Yak-40, mostly because it seems easier to me and I get a chance to learn the terminology. The SD Yak-40 has an option to turn all Russian into English, which is great for people who don't know any Russian. That way, by flicking he language switch, you can learn the terminology pretty quickly. And besides, the model is beautiful and system simulation is great. Plus, it's short-range, so your flight won't be too long, which is good for those that don't have much time.Concerning Boeing aircraft, I feel I sort of "know them" after trudging through the PMDG 747. I don't think they are all that different, and I found I generally know how to operate the LDS767 with my PMDG 747 knowledge. As a result, I also understand the 757 somewhat. Concerning the 737, I still have to work on that, mainly because of the radically different switch positions. And believe it or not, it's the 737-200 and 727/707 cockpits that keep eluding me the most. I just can't get my head around that ancient 737-200 A/P. I always seem to do something wrong. Oh well, with time comes knowledge...

Overall I've found the most complex aircraft to fly is the old well modeled three man cockpit setups (Russian airliner are on a whole other level):- Ready For Pushback's 742- Dreamfleets 727- SSTSim's ConcordThe more moderen aircraft like the 737NG and 744 are a piece of cake by nature as so much is automated and it only takes two pilot's to fly them. There's also commonality with glass panel cockpits versus what you get with the older three man steam gauge cockpits.The aircraft that is the most unforgiving, gratifying, and down right fun is (in other world the best FS model you can get):- Leonardo's MaddogFor me the Maddog is the most outstanding effort I've ever seen because just like the real world not paying attention can get you in trouble fast:- Forgetting to set 'autobraking' on approach can have you rolling off the runway on your landing roll. Manual braking on final can cause the brakes to over heat and thus cancel all braking power.- On takeoff you can blow out an engine if you don't manage your thrust correctly. There's nothing like loosing an engine just after wheels up.- Care has to be taken with taxing as you'll overheat your brakes and loose the ability to stop.- Taking care to make sure your after startup checks are done because all too often one engine hasn't started up correctly requiring you to shut down that engine and request maintenance. The list goes on and on that's why the Leonardo Maddog is the best of the best in FS for airliner realism...Taking a turn to GA the plane that I've found has the best feel when landing is:- Flight1's CommanderDon't ask me why, this bird just feels right in those seconds right over the runway. If you land the right way as you would in the real world to me this birds feel is spot on more than any other GA bird in my hanger. That aside the best most complex GA's you can buy is:- Dreamfleet's Baron/A36- Aeroworx's Kingair- Digital Aviation's PA31T CheyenneRealistic Corporate Jet flying has two main developers with the best work:- Feelthere- Eaglesoft

I'm surprised nobody mentioned the VRS F/A-18. I find it to be the most realistic aircraft in my hangar. Given, I don't own the more recent PMDG offerings, but the VRS is in a league with few othersIt is followed closely by the Level-D 767 and the Ready for Pushback 742. Both have great systems and still hold their own despite their age.

Depends on how you define complex.+1 The Leonardo Maddog 2008 simulates ALOT, from icing, braking action. failures, etc. I picked it up for less than PMDG's stuff.

Depends on how you define complex.+1 The Leonardo Maddog 2008 simulates ALOT, from icing, braking action. failures, etc. I picked it up for less than PMDG's stuff.

Maddog 2008, hands down! ...for all the reasons already listed!

I'm surprised nobody mentioned the VRS F/A-18. I find it to be the most realistic aircraft in my hangar. Given, I don't own the more recent PMDG offerings, but the VRS is in a league with few othersIt is followed closely by the Level-D 767 and the Ready for Pushback 742. Both have great systems and still hold their own despite their age.

Amen, VFS F/A-18 is complex (high fidelity) as and as polished as Maddog MD80PMDG747/FPMDG MD80F1 ATR72DA CheyenneLDS763DA Do27DF A36RA SF260Honorable mention goes to FT's CitationX, ERJ135, Aeroworx King Air B200, and PSS777.Pat

Amen, VFS F/A-18 is complex (high fidelity) as and as polished as Maddog MD80PMDG747/FPMDG MD80F1 ATR72DA CheyenneLDS763DA Do27DF A36RA SF260Honorable mention goes to FT's CitationX, ERJ135, Aeroworx King Air B200, and PSS777.Pat

As mention too many times in this tread the Maddog 2008 Pro is not forgiving. It is the only plane I cannot walk away from my desk longer than 10 minutes and comeback to see the sim has reset and not from aircraft collision. This plane has to be monitored at all times. I only fly her when I have devoted time to fly without any interruptions. I DO NOT put this plane on pause or accelerate the sim. I own and have 80% of all the planes mention before. I just recently turn on the failure generator because the normal operation was hard enough. Carl Perry 7+ year sim pilot

Has anyone tried out the multi-user panel on the MD82 yet? That's one area I think would be awesome to try with someone else.

Has anyone tried out the multi-user panel on the MD82 yet? That's one area I think would be awesome to try with someone else.

I forgot about that feature. I feel I would not be up to par enough to fly with anyone else. I would get a pilot who cannot find the fuel levers or a "Real World MD pilot" flying sim barking out orders that I could not possibly keep up or follow. We need to set some kind of skill level measure to use that feature.Carl Perry 7+ year sim pilot

I forgot about that feature. I feel I would not be up to par enough to fly with anyone else. I would get a pilot who cannot find the fuel levers or a "Real World MD pilot" flying sim barking out orders that I could not possibly keep up or follow. We need to set some kind of skill level measure to use that feature.Carl Perry 7+ year sim pilot

2 heads couldn't do any worse than 1 I would think. I've got enough hours and a few landings under my belt that I could hold my own. Combine that with some sort of voip server (Teamspeak or Ventrilo) and you have yourself the makings of an interesting afternoon.

2 heads couldn't do any worse than 1 I would think. I've got enough hours and a few landings under my belt that I could hold my own. Combine that with some sort of voip server (Teamspeak or Ventrilo) and you have yourself the makings of an interesting afternoon.

Then you have to get a pilot in the same mood. One who follows all the procedures or one who is ready to fly and skip some of the procedures. I have skipped a few test just to get into the air from time to time.Carl Perry 7+ year sim pilot

That aside the best most complex GA's you can buy is:

Buy, buy ,buy...... as someone who flies the freeware Project Tupolev TU-154M without the manual and from memory . (Not speaking Russian has nothing to do with learning to fly this incredible aircraft IMHO....just practice)I found the hardest aircraft to keep up in the air was a freeware Yak-18T.....so much so I re-wrote all the gauges without failures! :( If you want a cute GA that punishes you if you do not look after her...his one has been out for years.

1. Aeroworx B200.[...] This plus extreme taxi speeds makes this bird one tough prop to fly.

Adjust your condition levers to low idle and you won't have any extreme taxi speeds. But I agree - The B200 is definitely on the list. Not avionics-wise but when it comes to depiction of turboprop characteristics within FS9 limits. And if you upgrade with GNS430/530W you can even fly the WAAS approaches easily.