Morten

The beta team - which are doing a fantastic job by the way - is currently at beta v1.1b3 and things are looking promising so far As most of you know, everyone on the team does this on their spare time besides full time jobs, family and kids. We are doing our best to get v1.1 out to you as soon as we can. M

3B and 3C requires the aircraft is equipped with the rollout function (AP controls the rudder), which the 737CL's do not have - so no...

Right (except nose gear doors, and there is upwash there..), but also the gear itself will create more drag while being retracted (closer to the fuselage/wing) than extended, causing separation/interference drag etc. and this would take place during the time while the situation might be in it's most critical phase. Even on the 737 you can feel the vibrations (atleast in the cabin) from this just as the gear leaves/enters the wheel well

Nice airport Tom, which is that?

From FAA advisory on windshear;

Jan probably should answer this, but from what I understand, retracting the gear may cause temporary increased drag while the gear doors are open.

Impressive the things you guy's notice Not sure, but I know there are differences between aircraft on what illuminates on the fire/overheat test, so might be in this case well. Jan maybe remembers. M

XP 11 is till in beta and will be for a while. At this point (today) most aircraft work with some minor fixes, but who knows tomorrow... Anyway, XP10 quality aircraft will need a major update to work properly in XP11. Especially on the flight model side of things... so we are talking several months atleast before everything is back to normal.

Looks like Austin is still very busy updating the FM. Massive update to the subsonic jet engine model in XP11 just announced! As you know, we already have our own custom very accurate CFM-56-3 jet engine model. Lets cross fingers that he hasn't messed it up for us...

Not quite, there are atleast 4 types of ground effect that starts at different altitudes depending on wing design. The pitch down effect is just one of them.... so you need to know exactly which one of them you are talking about and the wing design. There are a lot of misconceptions about "ground effect", also amongst experienced pilots. M

Well, you said their 747 has "huge increase in lift", if thats the case they have not...

FSX/P3D ground effect is all wrong judging from what I've read about it. They have mixed up two different types off effect. Also be aware that we had reports of problems with ground effect in the latest XP11 bets's

No, not as this point

Well, flaring too early will cause a hard landing (airspeed drops close to a stall), so will flaring to late (high vertical speed). Also at what point you idle the throttles is important. Just before you flare, your vertical speed will be about 700 fpm, or in other words 10-15 feet/sec, so timing the flare just 1 sec +/- wrong will put you 10-15 feet away from where you should be causing a non-smooth landing. Jan can give you much better advice than I can, but I bet he'll tell you a smooth landing is not something real pilots aim for because that can cause you to land too far into the runway (float) which might be dangerous, tail strike, cost extra fuel/time missing exit's, wear on brakes etc.

Laminar has just released a list of data over aircraft use in XP10 and 11. The 737 tops the list for XP11 and is high up in v10 despite it has only been out for 3/4 of a year (XP10 was released in 2012 I think). We are very happy with these numbers since they show that people actually use the 737 a lot and don't just put it in their hangar to dust down http://developer.x-plane.com

Right, Austin is still tinkering with the fuselage/body drag and other things, probably breaking other stuff, so it's too early for us to digg into this. It is important that everyone reports obvious FM errors to Austin at this point to get things back into the ballpark (austinATx-plane.com). We will take it from there. Important when reporting FM issues, use one of the default aircraft as a reference (that also was in v10 for comparison). Not the IXEG 737.

hehe.. well, he'll just blame the aircraft designer if you refer to something else than the default aircraft

Correct, this is a problem with XP's radio altimeter, not the callout. Sent a bugreport to Austin some time ago. (RA will show "0" between 0-6' AGL) Makes you flare a bit early (like +6' high) and also will make auto land float a bit. We decided to wait and see if they fixed it for XP11, if not we'll fix it our selves. Problem is, when we do, it will mess up everyones landings since people have been getting used to flaring late, so not sure it's a good idea M

Yea, Austin usually breaks a few things while implementing new flight model stuff...nothing new there Report all your FM findings to austin(at)x-plane.com. Remember, use the default aircraft as a reference when reporting flight model issues. M

FYI, Jan recorded the one we use himself with a professional sound recorder, as with the rest of the sounds...

Just an example of what I was talking about "moving target". As some might have noticed in the beta 10 release notes; More flight model and AI ground truck improvements. Not alot of info to work on, but we happen to know this time its is about fuselage/body drag. (A bug we discovered 6 years ago that is fixed on our v10 aircraft ) M

PROG page is work in progress

Is it maybe the case of having 2 IXEG aircraft installed? Is your MCP weird as well?

To keep FPS as good as possible, we decided to use just one wing texture. Very few airlines have registration on the wing. We might add this option using a decall later

We are starting to get questions about this so I thought I'd start a topic to explain and clarify how things work in XP and what you can expect ahead. As you know all of us at IXEG are old timers and have been developing aircraft since XPv5 or so, (like 15-20 years ago) and have been through this process many times before. Since it's been years since XP10 got released we assume a big portion of the current user base have not experienced a new XP version run change and what this actually MEANS to your favorite aircrafts. Basically, in a new XP run, it is "tradition" for Austin to implement lots new flight model stuff. Some new stuff, some big stuff, some minor tuning here and there of various things. Typical ones are; Thrust (engine) Lift Drag Ground model Controls etc. Also, this usually takes place throughout the entire beta phase (where we are now), and by experience will continue through to at least XP 11.1 when things start to stabilize. During this phase, XP11 is a moving target flight model wise, and attempts by the designers to chase austin's tail and "fix" flight model related stuff is a waist of time because chances are big things will change again in the next beta. So designers tend to hold off for a while before we start looking at it. THEN at some point we start looking at it, and usually we discover more errors/bugs/new stuff in the new FM, which again leads to debates with Austin and hunt for documentation. Also, it is tradition for Austin to tune stuff that he does not mention in the release notes, so there are usually a few surprises. Further, LR policy is that the designers have to prove they are right, and LR is wrong, not opposite... So sending Austin emails like "Hey, the thrust has changed 20%, fix it!" is not going to change anything. So basically you have 3 choices as a designer; Prove to Austin you are right (takes a lot of time, knowledge, effort and documentation) Reverse engineer your own flight model (Also takes a lot of time and effort) Pretend your aircraft is performing just fine, ignore user reports, and do nothing So basically, as it looks today, all quality aircraft will have issues that needs to get fixed moving from 10 to 11. For those aiming at the highest level of accuracy in the FM (like IXEG) designers *might* need to do a complete recalibration of the aircraft. This is not a trivial task as you can imagine, XP's FM is far more complex than e.g. FSX SOOOoooooo, what do we know at this point about XP11 PB8 that might/will affect us; Drag has changed Ground model has changed Engine model has changed As we digg deeper into XP11 we might find more things, but we'll see. Like I said, this is perfectly normal It is just a phase everyone has to go through and everyone needs to be patient. Kind of like moving from FSX to P3D from a designer point of view. There is no "quick fix", this is hardcore engineering and programming. The good news is we will do all this work for free, and in the mean time, we recommend using XP10 if flight model is important to you M