Did you have the nosewheel staying off the ground after touchdown without pushing the nose forward? If I’m not doing anything it keeps pulling “wheelies”.
Not at <70 KIAS no. Just before Vr there are some small wheelies though. I haven’t really played around with the CofG so maybe that is the cause?
Well I haven’t flown the TBM in real life but it doesn’t seem realistic behavior to me no matter where the CG is located (within limits of course). I normally use 2 people up front, the rest empty so relatively forward CG…
Well, propeller drag is not modeled and the Asobo stock airplane flight models are - say it polite - average. I use the following workaround in my flight model mods: increase drag_coef_zero_lift. Use the Drag Coeff sub-parameter in flaps point.X parameter. Increase drag_coef_gear.
How does it work? More drag_coef_zero_lift worsens the polar glide curve. To compensate I increase thrust_scalar. This results in too good acceleration/deceleration. As you bring out gear and flaps you increase drag even more. If I set values correct, I can fake a realistic landing, even if the means I use are not based on propeller drag or ground effect.
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Hello douglas9648, I made a flight model mod for the Asobo Boing 747-8. I did not change the lift_coef_ground_effect_mach_table value. For me there is NO ground effect in MSFS 2020. The main reason for floating in my opinion is bad (L/D)max for all airplanes and missing propeller drag for the propeller airplanes.
See MSFS 2020 sailplane for my flight model mods and see Daher TBM 930 flight model mod • Flight Simulator 2020 for a “cookbook recipe” for fixing Asobo airplanes.
There is already a thread about this: [REPORTED] World Update 3 has broken flight dynamics, exhibit A - #5 by Rev20105189
This thread seems to be from November 2020 though 
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I read your workaround “recipe” with great interest, and I have read a great many of your posts. You are one of handful of clear thinkers in the forum who have the knowledge, experience, and perspective to understand what’s going on in the big picture.
We know that float in ground effect is only one, minor symptom of the changes to the core flight model. My testing has revealed other subtle changes as well, including ground handling. Asobo’s release notes and subsequent statement about lift issues indicates that they intentionally released some changes, and made a mistake by unintentionally releasing other changes prematurely.
To be objective, there are many things that still need to be improved in the sim, the development environment, the release procedures, and in the communications. Oh, well. It is what it is. And that means for quite a while yet, we’re going to have to rely on mods and tweaks to make it through.
Like you, I have no aversion to diving into the technical details and making tweaks where possible. I have the TBM flying very well just using FSUIPC and my own config file tweaks. I just passed my PilotEdge CAT-3 rating yesterday in it, having to fly three right traffic patterns using proper ATC procedures. It was a lot of fun.
I think we both know that just decreasing the lift on the flaps is not all that is needed. The flaps should add more lift than they did, but when adding extra lift, you also have to account for the flap pitch moment, which causes the exaggerated nose up behavior. It also causes the exaggerated nose down behavior. Each plane is going to behavior differently, especially now that they are changing the core flight model to be more realistic. And until they model drag more completely, we still have the slow down problems. I made gear drag 6 times greater and the TBM flies very much like a Piper Arrow with the gear down, even with the flap lift unchanged.
Right now, the biggest behavior that annoys me is the extreme nose drop in any turn. It’s unrealistic, and has been a problem since the beginning. I bank to 20 degrees and without a lot of attention and about a 7 degree nose up attitude, I end up in a 2000 fpm descent. I’ve been trying to figure out what parameters to tweak to offset that behavior, but just can’t seem to nail it using stability and so on. I might resort to FSUIPC LUA code to programmatically stabilize turn behavior if Sim Update 3 doesn’t present an easy solution.
Keep up the good work you’re doing. There are a great many simmers on here that shouldn’t be messing with the config files. They need good mods to just install and forget, and spend their time flying rather than complaining on here. Good mods will buy us enough time for Asobo to give us the core behaviors and controls (interfaces and config file parameters) we need to have realistic base planes. And after that, third parties will be able to provide us with the high quality planes we so desperately desire.
Brian (Yeti64)
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Well, I started the flaps topic with sailplanes. Sailplanes use flaps not for lift or drag, but for different airspeeds. With this background I set lift_coef_flaps = 0 in most of my flight model mods. And these mods need no flight dynamics bug workaround 
Well, this is the perfect recipe for the next disaster. Today Pa can do self-teaching with this nice video https://www.youtube.com/watch?v=ZuTVpXaryTc
Sooner or later Pa and nobody else will know what his set-up is. Then Asobo fixes their bug. And Pa is frustated again. Because now the fixed bug is the reason for his frustration. What will Asobo do? Maybe say “this is not a bug, it is a feature” and change the documentation like this: “do not enter the correct value, but half of the correct value, because we have this feature in the flight dynamics engine that multiplies the value by two”.
Believe me, software that is around for some time is full of these quirks. And good software has honestly documented quirks. 
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I have made my living developing software and teaching Software Engineering for over 40 years, and I will completely confirm your statement!!!
All software is a living, breathing, evolving thing right up to when the authors discontinue it. Then it becomes a dying, gasping, mutating thing, kept barely alive on life support by third parties or creative users. But at least they finally have a stable code base.
And once it dies, at least a few hard core users take it to software heaven. Bruce’s original flight simulator is still being run once in a while on ancient computers and modern PC hardware simulators. Others talk fondly about it for many years, like those people who reminisce about the days before the first airplane, or before cars, or before cell phones.
If the current forum content is any indication, this new sim has already been condemned by the masses to go to the opposite of software heaven. But even if it never improves from here, it can take comfort in the fact that at least one person will fondly remember it for the amazing technological achievements, its beauty, and the fact that it gave me goose bumps on more than one occasion because it made me believe I was actually flying again!
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Two old men sitting at a virtual camp fire … Yes, I have 40+ years in software, too. I started with Intel 8080, Zilog Z80 and so on.
I think MSFS 2020 is a winner. I do not think that the competition has the money and the manpower to have their own “world in the box” as background.
Yes, many users in the forum complain. But have you seen how many liveries are on flightsim.to? And behind every “paint job” is a person who spend hours, days, weeks to make it.
I think the livery builders will stay. The hot heads will go or will calm down. We have already update number 3 for free.
And I think Asobo is learning serious project management as “learn through pain”. I did it, and the Asobo team will do it, too. They are intelligent people!
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I was born in 1955 and have witnessed us go from literally no computers at all to putting a man on the moon.
In 1977, I started my professional career with the original Trash 80, 4K memory, monochrome monitor, and a cassette recorder for storage. I was a former sales manager for Powell Ford in Ft Lauderdale, and started a business where we maintained a list used cars at most local dealers. We advertised in the local paper and people could call us and find available cars and prices. Kind of like EBay or Craigslist today.
We are SO privileged to have lived the thrill of moon missions to Star Trek to GPS and cell phones to unbelievable PC flight simulators affordable to the unwashed masses to — [sound of destructive record scratch] — all this negativity and vitriol on the forum.
I spent many, many hours and a LOT of money building an RC P-51 (my favorite plane), only to see it crash on its maiden flight because of a radio malfunction in the controller. Somehow, I just can’t get worked up over a minor, fixable, flight model glitch.
Excuse me for a minute, but I’m going to go cry over the loss of my beautiful P-51 model that bevy got a chance to fly with the eagles as she was designed to do.
I have the same problem. Asobo is aware of the problem and is working on a fix. Stay tuned.
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Well, I have no P-51D model for you. But I have at lot of 1s and 0s that together make a MSFS 2020 P-51D. Download it from my home page MSFS 2020 sailplane
And don’t tell the kids that this airplane can really go fast. Only my Extra 330LT mod has better acceleration, but lower maximum speed.
My children were born into a world with computers. You and I have a memory of before computer and after computer.
I’ll check it out – probably this coming weekend!
Just a little off-topic question. I’ve been meaning to ask this for some time. Is a "software engineer’ the same as a ‘computer programmer’?
It’s like the difference between a bookkeeper and a Certified Public Accountant.
A programmer might be self-taught and typically focuses on coding assigned tasks in one or two languages as part of a larger team.
A software engineer usually describes someone who has a college degree in Computer Science. That degree requires courses in business, accounting, calculus, and numerous courses in database management, several different coding languages and language concepts like object oriented and procedural techniques. You learn networking, communication, code management, QA, and a little project management.
Software Engineering encompasses the roles of Architect, Designer, Programmer / Coder, and QA, all operating within a team framework and coordinated by Product and Project Managers.
In my opinion if you say (software) engineer you think of a person with formal education from an university. If you say computer programmer you imply no formal education.
The big confusion is “Microsoft certified engineer”. For me this “learn to press buttons the Microsoft way” is no formal education. But is has a nice sound …
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I see. In my day (60’s & 70’s) I believe that would have been a Computer Systems Analyst. No one I knew had a degree in the field. Most had attended some type of computer technical school. Of course that was all business/manufacturing applications.
Yes. Remember there were no mainstream computers at all until the moon missions at the end of the 60’s. Business “mainframes” were the norm in the early 70s – mostly Fortran and COBOL number crunchers and database managers at very large companies, government, and educational facilities. No word processing or spreadsheet applications until the advent of “micro-computers” in the mid to late 70’s. Even in the early 80’s, most colleges at most offered degrees in Data Processing on mainframes – like the IBM 360 system – with Fortran, COBOL, and RPG (Report Program Generator) being the main languages that were taught. It was only some years later that the IBM PC came out, Windows 3.0 became a standard, and Computer Science became a thing.
And now here we are decades after that, with Microsoft Windows on PCs running a beautiful flight sim that is a pretty amazing achievement other than things like the excessive float in ground effect (on topic!!!).