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  1. 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
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