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Make sure you have CLB thrust selected, TO will blank passing FL150 and ATS will disengage as a result.

After doing a review of the flight model and taking a fine chisel to it I was able to get the Performance more in line with the POH cruise figures. The take off performance seems better but has not been evaluated. This mod is NOT supported by TOGA Simulations. They are aware of it. TOGA Simulations are not obligated to offer any form of technical support to a modified aircraft, so don't contact them. IF YOU CHANGE YOUR ACF YOU ARE ON YOUR OWN. If you are not familiar with modifying the acf file with a text editor you will find this challenging but doable. You will find this very difficult to do if you aren't using notepad++. You will find this very easy if you use a file patching utility (https://www.google.com/search?&q=applying+diff+file+windows) or (https://www.google.com/search?q=applying+diff+file+mac). Things this mod does: 1) New wing airfoils 2) New Prop and prop airfoils 3) New max power 4) Tuned prop governor 5) cruise performance TAS within 1% of POH values 6) Take off behavior more aligned with POH takeoff profile 7) *NEW* Added ventral and wing tank fins Things this mod does NOT do: 1) alter fuel flows *NEEDS TOM* 2) modify the lua code 3) make the airplane easier to fly Things to do: 1) validate takeoff performance 2) validate climb performance 3) Tune EGT more, you will be at 660C at FL200 and cruise power *REQUIRES TOM* 4) Tune CG *DONE* 5) Validate OEI performance 6) validate airfoils xplane parameters (theres some nuanced values which dont affect normal regime flight dynamics but should be adjusted for correctness, these will become more important as stall behavior is validated) *DONE* 7) validate stall behavior - suspected flap aero is the issue, will probably require custom flap lift controller Things used to make this mod: 1) POH and AFM 2) Hartzell Aluminum Blade overhaul manual Things that were tested: 1) Climb and Cruise TAS at POH settings for 10k, FL200 at 11,500lbs, FL310 11,000lbs Instructions: 1) unzip the airfoils zip file into the following folder X-Plane 11\Aircraft\X-Aviation\Mitsubishi MU-2 Marquise v2\airfoils 2) BACK UP YOUR ORIGINAL ACF FILES. For those of you that want to use a patch file open the MU2_mod_unified.diff or the MU2_mod.diff and apply that patch file. MU2_mod_unified.diff is a context 0 unified diff file, the MU2_mod.diff is a WinMerg normal patch file. Proceed to step 4. 3) For the rest, I applaud your dedication, you will need to open the acf and manually modify the following (i highly recommend notepad++ for this) DO NOT under any circumstances use planemaker to make the changes. Plane maker converts all the values on file open then reconverts the values on file save which WILL induce uncontrolled file changes. The more times you open any file in planemaker and save it, the more changes get imparted. a) open the MU2_mod.diff file using notepad++ b) Each section is formatted in the following way [start line number],[end line number]c[start line number],[endlinenumber < old thing --- > new thing so for example 25621,25626c25621,25626 < P _wing/0/_Croot 0.500000000 < P _wing/0/_Ctip 0.583333313 < P _wing/0/_afl_file_R0 Clark-Y (good propeller).afl < P _wing/0/_afl_file_R1 Clark-Y (good propeller).afl < P _wing/0/_afl_file_T0 Clark-Y (good propeller).afl < P _wing/0/_afl_file_T1 Clark-Y (good propeller).afl --- > P _wing/0/_Croot 0.349166662 > P _wing/0/_Ctip 0.678333342 > P _wing/0/_afl_file_R0 NACA-2330.afl > P _wing/0/_afl_file_R1 NACA-2330.afl > P _wing/0/_afl_file_T0 NACA-0003.afl > P _wing/0/_afl_file_T1 NACA-0003.afl there was a change starting at line 25621 through lines 25626 the C means change. The change to be made are all the lines with ">" markers. c) manually replace all the values in the acf with the ">" values. excluding the ">" markers and replace so for example at line 25621 to 25626 your acf will look like this: P _wing/0/_Croot 0.500000000 P _wing/0/_Ctip 0.583333313 P _wing/0/_afl_file_R0 Clark-Y (good propeller).afl P _wing/0/_afl_file_R1 Clark-Y (good propeller).afl P _wing/0/_afl_file_T0 Clark-Y (good propeller).afl P _wing/0/_afl_file_T1 Clark-Y (good propeller).afl after modifying it should look like this: P _wing/0/_Croot 0.349166662 P _wing/0/_Ctip 0.678333342 P _wing/0/_afl_file_R0 NACA-2330.afl P _wing/0/_afl_file_R1 NACA-2330.afl P _wing/0/_afl_file_T0 NACA-0003.afl P _wing/0/_afl_file_T1 NACA-0003.afl 4) Save the file once all the changes have been applied. 5) In xplane adjust your prop lever axis response to go up to 100% per the image below I am very limited in time so I have done my best to explain the process, I highly suggest patching the file instead of manually editing. Enjoy. I will update things as they happen. I have very limited time to offer technical support (troubleshooting) for this, so I leave most of the trouble shooting as an exercise for the reader. Additionally the ods version of the W&B document doesnt contain the text labels that the excel version does (image of the excel version below) airfoils.zip MU2_mod_unified-2022-08-09.diff MU2_mod-2022-08-09.diff W&B.xlsx W&B.ods

So I have owned the MU-2 for two days and I have to write this - the plane is great and I can see and appreciate a lot of love and a lot of work put into it. Flying the MU-2 is pure pleasure, although it is a very "restive" individual ;-) Thank you very much for this plane, and the fact that it is very FPS friendly, despite its excellent modeling, deserves additional great recognition. Apart from a few necessary tweaks to make VR flying more perfect, which I hope will come soon, it's a great pleasure to use the MU-2. P.S. It was probably already reported: TAXI lights after switching off - bulbs remain lit and the light beam disappears ;-)

Just a developer commentary to any who may also read this. CaptCrash did discuss these with me and I am happy he is looking at the performance and I am also keen to improve the performance numbers; however, the relative work (relative to everything else required to be done to get 95% of the customers happy) ... to get the last 15% of performance accuracy is such that I have always found it best to do those final refinement tweaks last, after everything else is working. This is generally because the final performance tweaks can be made quite quickly....with all due respect to the FLIGHT TESTING...which is not very quick though. As soon as the obvious issues slow down, I'll will take a deep breath and start on the fun stuff, which includes performance. Call it.."round 2" of V2 work! -TK

Quick note: IRL the use of ATS during go-around is technically prohibited (AFM limitation). The expanded language states 'pilots must manually set thrust to override ATS. ATS may be used to trim final N1 once manually set. Advance thrust levers to the predetermined go around N1 setting (this target should have already been set to TO) while simultaneously pressing TOGA and ATS DISC. Note: ATS must be disengaged as thrust levers are advanced. If ATS is NOT disengaged and the pilot overrides the ATS as the levers are advanced, the ATS may advance to the forward stop - triggering an exceedance. Flight Spoilers (if extended) RETRACT Rotate smoothly at a speed not less than Vref towards command bars Set pitch attitude to achieve a speed not less than V2+10 as the flaps are retracted in next step to 20 Flaps 20 When climb is positive - Gear UP (there is a note that if a turn is required in MAP, delay this turn until gear is fully retracted) Retract flaps 'on schedule' (At a safe altitude not less than 400 AGL and speed not less than Vfto-5, flaps UP) Thrust Reversers OFF Continue normal climb procedures These are from the FCOM. This should be practiced and accomplished as a combined set of actions. You commit to the GA pressing TOGA, and then in a series of coordinated steps you press ATS DISC and advance the thrust levers as you're pitching up into command bars. You're verifying the spoilers are retracted and calling for Flaps 20. Things happen quick - you're going to see positive rate pretty fast and you'll ask for gear up. You'll be fine tuning your N1 manually to the TO thrust target. If you were flying green needles on the approach you'll also be asking for your Nav source to be switched back to the FMS (or doing it yourself - I have a button mapped for this) so you'll have the appropriate lateral mode available to fly the MAP. You'll then ask for (or select) NAV and VS. (If you prefer you can press sync to select PITCH, or select FLC but see note below) As you're climbing away you'll be asking for or selecting "AP engage" and setting the speed target to a procedurally appropriate speed - typically the same as a normal climb profile, 190-200 knots. At this point you can engage the ATS as part of the 'normal climb procedures step. Note, Selection of FLC mode during GA is prohibited unless the altitude pre-select is set higher than current altitude when ATS is engaged. This is small gotcha that can bite you on a GA if you don't sequence things correctly.