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What is going on with the iFly 737 MAX flight model in 2024?

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  • Author
19 minutes ago, LRBS said:
Folks, @Stearmandriver it's right on the money about PIO. 
 
Aside from the bad physics still present in MSFS2020/2024, there are also problems with adjusting peripheral sensitivities, which should have a linear response rather than curves. 
 
After reviewing many YouTube videos (in particular this guy), it's clear that a very high percentage of people continue to overcontrol their flight controls. Yes, at those wx conditions, you will encounter up/down drafts, but not what ASOBO thinks. It's really difficult to understand where they get this, and whether they would ever correct these issues.
 

See 2:13:00 of the same video, as he approaches KSLC. Even with AP on, the plane is being pushed around like it's a Cessna.

You're completely right that Asobo's turbulence is exaggerated, but still, I've flown in the same conditions in other airliners and they do not get tossed around like that. In fact, I flew the Fenix A320 into KLAS yesterday at 40C, and while I definitely felt the thermals on approach and had to make constant small corrections to maintain the flight path, it still behaved like an airliner and not a Cessna. Even the PMDG 737 in MSFS 2020 (which has its own flight model issues) did not get tossed around quite like the iFly did.

The reason why this is so jarring is because the iFly flight model feels so good otherwise.

Edited by RNAVV19R

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  • If anyone is interested,  those changes for Ifly737 will help in wind/turbulence conditions.     [AIRPLANE_GEOMETRY] elevator_elasticity_table = 0:0.5, 50:0.8, 100:1.0

  • I thought the same thing up until last week. The approaches in the above video are anything but stable, though, and it has nothing to do with trim. It's a recent phenomenon that I've noticed

  • Virtual-Chris
    Virtual-Chris

    I’m just saying if you really want to get to the bottom of this, you’ll likely have to do some test flights… with and without the beta, cold vs hot, and maybe even different versions of the files from

49 minutes ago, RNAVV19R said:

See 2:13:00 of the same video, as he approaches KSLC. Even with AP on, the plane is being pushed around like it's a Cessna.

You're completely right that Asobo's turbulence is exaggerated, but still, I've flown in the same conditions in other airliners and they do not get tossed around like that. In fact, I flew the Fenix A320 into KLAS yesterday at 40C, and while I definitely felt the thermals on approach and had to make constant small corrections to maintain the flight path, it still behaved like an airliner and not a Cessna. Even the PMDG 737 in MSFS 2020 (which has its own flight model issues) did not get tossed around quite like the iFly did.

The reason why this is so jarring is because the iFly flight model feels so good otherwise.

Having in view that  @Stearmandriver it is current and qualified in the airplane, his evaluation is very important and should be taken into consideration. I flew the 734 many years ago, and it has nothing to do with this one. 
About other "airliners," we might want to consider that some are more stable than others, even within the same category or type. I will give a few examples of airplanes that I have flown and remember very accurately. A340-200 and 300  are less stable than A340-600 or A380. B747 SP is less stable than the 100, B747-200-300-400, while B748 or B777 is very stable. Of course, all are affected by turbulence to a certain degree, and some fly like "on rails" regardless of size.

747 Captain for the last 39 years, and still learning. 

 

Edited by LRBS

747 Captain for the last 39 years, and still learning. 

 
 

Edited by LRBS

747 Captain for the last 39 years, and still learning. 

If anyone is interested,  those changes for Ifly737 will help in wind/turbulence conditions.  

 

[AIRPLANE_GEOMETRY]

elevator_elasticity_table = 0:0.5, 50:0.8, 100:1.0, 200:0.8, 400:0.5

aileron_elasticity_table = 0:0.5, 50:0.8, 100:1.0, 200:0.9, 400:0.7

rudder_elasticity_table = 0:1.3, 80:1.3, 150:1.0, 600:0.65, 1500:0.0

 

[AERODYNAMICS]

lift_coef_pitch_rate = -12.0  

lift_coef_daoa = 2.0        

side_force_slip_angle = -0.15 

pitch_moment_pitch_damping = -185.0 

yaw_moment_yaw_damping = -2.7  

elevator_scaling_table = -0.758:0.9, -0.524:0.8, -0.175:0.7, 0.0:0.6, 0.175:0.7, 0.524:0.8, 0.785:0.9

aileron_scaling_table = -0.785:0.9, -0.524:0.9, -0.175:0.85, 0.0:0.6, 0.175:0.85, 0.524:0.9, 0.785:0.9

rudder_scaling_table = -0.785:0.9, -0.524:0.9, -0.175:0.85, 0.0:0.8, 0.175:0.85, 0.524:0.9, 0.785:0.9

 

[FLIGHT_TUNING]

cruise_lift_scalar = 1.15    

induced_drag_scalar = 1.35   

elevator_effectiveness = 0.95 

aileron_effectiveness = 0.92    

rudder_effectiveness = 0.95   

pitch_stability = 1.1        

roll_stability = 1.15          

yaw_stability = 1.1             

pitch_gyro_stability = 2.2    

roll_gyro_stability = 2.2      

yaw_gyro_stability = 2.2       

ground_crosswind_effect_zero_speed = 8 

ground_crosswind_effect_max_speed = 101

ground_high_speed_steeringwheel_static_friction_scalar = 0.5  

ground_high_speed_otherwheel_static_friction_scalar = 0.85      

enable_high_accuracy_integration = 1    

ground_new_contact_model_gear_flex = 0   

ground_new_contact_model_gear_flex_damping = 0  

ground_new_contact_model_up_to_speed_lateral = 8000    

ground_new_contact_model_up_to_speed_longitudinal = 8000   

ground_new_contact_model_rolling_stickyness = 0.2

 

[STALL_PROTECTION]

stall_protection = 1

off_limit = 0.95

on_limit = 0.85

timer_trigger = 2.0

Edited by LRBS

747 Captain for the last 39 years, and still learning. 

  • Author

I saw a recent stream from another individual landing in KLAS at 40C and the iFly did not exhibit this behavior, so it looks like there might be another issue that is causing this for some users. Maybe the presence of some other addon is causing the issue, though I am not using FSRealistic or any weather addon.

The iFly is only experimental in MSFS 2024 anyways. Hopefully this won't be a problem once the fully native MSFS 2024 version drops.

Edited by RNAVV19R

  • 2 months later...

Hmm , i am having a weird issue only with this one. 

The HUD is deployed in cold and dark state and as soon as i connect the GPU the aircraft 1-2 seconds after starts pushing back. No brakes works

Michael Moe

Michael Moe

 

fs2crew_747_banner1.png

Banner_FS2Crew_Emergency.png

14 hours ago, Michael Moe said:

Hmm , i am having a weird issue only with this one. 

The HUD is deployed in cold and dark state and as soon as i connect the GPU the aircraft 1-2 seconds after starts pushing back. No brakes works

Michael Moe

Reinstall fixed it

Michael Moe

Michael Moe

 

fs2crew_747_banner1.png

Banner_FS2Crew_Emergency.png

On 8/10/2025 at 9:23 PM, 11bee said:

Honesty, to me, the MAX is great to hand fly.  Very stable, you just need to use decent amounts of trim to smooth out climbs and descents. 

you cannot be flying the same Ifly plane.  The approaches are unstable and the ILS tracking is off a bit.

3 hours ago, Tierborn said:

you cannot be flying the same Ifly plane.  The approaches are unstable and the ILS tracking is off a bit.

Got a RL 737 Max pilot who concurs that the flight model is close to spot-on.   It's an issue with your controllers or technique.    Good luck... 

I am interested in getting the ifly 737. From what I have seen or read, I am not convinced yet. A330 Driver a real airline pilot says the flight director has trouble intercepting the ILS.

 

Flight Sim Software/Hardware: MSFS 2020 Premium Deluxe | MSFS 2024 Aviator | X-Plane Mobile 12 | X-Plane 12 |  Thrustmaster TCA Captain Pack Airbus Edition | Thrustmaster TCA Yoke Pack Boeing Edition | Honeycomb Alpha Flight Controls | Honeycomb Bravo Throttle Quadrant | Turtle Beach Velocity One Rudder | Xbox wireless controller | Stream Deck + | Flight Radar 24 Gold | Navigraph | Simbrief | WINCTRL PAP 3 MAG, 3N PDC, 3M PDC & PFP 7 Wingflex A320 EFIS, RMP & FCU Cube | 3rd Party Hanger: Fenix: A319, 320, 321 | Flight Factor: 777-200ER with engine variants | Flight FX: HondaJet HA420 FlyJSim: Dash 8 Q400 | Hot Start: Challenger 650 | iFly: 737 Max | iniBuilds: A350 |  PMDG: 737-800, 777-200ER, 777-300ER, DC-6 | Toliss: A321 with engine variants | Zibo: 737-800 Computer Equipment: Intel i7-13000K | Asus Tuf Z790 | 64 GB Corsair Ram | 2 TB NVMe OS Drive | 4 TB NVMe Game Drive | 3 X 4TB SATA Data Drives | Windows 11 | Asus Dual RTX 4070 CAE Full Motion Flight Simulator Experience: Boeing 737, Boeing 767, Boeing 787 Real Aircraft Flying Experience: Schempp-Hirth Janus, Cessna 172 and Cessna 185

https://www.youtube.com/@CYVRAviation

4 hours ago, Tierborn said:

you cannot be flying the same Ifly plane.  The approaches are unstable and the ILS tracking is off a bit.

I just tried a flight from PHX to LAS, and the plane handled flawlessly. It followed the localizer and glide scope and a perfect flair, spoiler deployment. Also tried another flight from ENSB to LIMC also went perfect.

Bill McIntyre

Asus StrixB650E-F Gamer, AMD Ryzen 9 7900X3D, Corsair Titanium DDR5 64GB, Samsung 990 PRO-4TB M.2, (4) 2TB SSD's, Corsair H1150i liquid cooler, RTX 2080TI Founders Edition, (2) LG 34" HD Curved Monitor, Sound Blaster Audigy X, 1Kw PC Power & Cooling Power Supply, Corsair Obsidian Full tower Case. MSFS 2024, WIN11 Pro x64                                                                                                                                             

58 minutes ago, carlanthony24 said:

Flew the IFly in 24 yesterday no problems

x2.   I fly it all the time, no issues.   I find it to be at the same level as the PMDG NG's.  It's got a couple of minor glitches specific to 2024 but nothing that has any real impact on the overall experience.   Once these guys release their long-awaited update, with the new EFB and kill those remaining FS2024 bugs, this thing will be right up with Fenix. 

On 8/12/2025 at 2:44 AM, LRBS said:

If anyone is interested,  those changes for Ifly737 will help in wind/turbulence conditions.  

 

[AIRPLANE_GEOMETRY]

elevator_elasticity_table = 0:0.5, 50:0.8, 100:1.0, 200:0.8, 400:0.5

aileron_elasticity_table = 0:0.5, 50:0.8, 100:1.0, 200:0.9, 400:0.7

rudder_elasticity_table = 0:1.3, 80:1.3, 150:1.0, 600:0.65, 1500:0.0

 

[AERODYNAMICS]

lift_coef_pitch_rate = -12.0  

lift_coef_daoa = 2.0        

side_force_slip_angle = -0.15 

pitch_moment_pitch_damping = -185.0 

yaw_moment_yaw_damping = -2.7  

elevator_scaling_table = -0.758:0.9, -0.524:0.8, -0.175:0.7, 0.0:0.6, 0.175:0.7, 0.524:0.8, 0.785:0.9

aileron_scaling_table = -0.785:0.9, -0.524:0.9, -0.175:0.85, 0.0:0.6, 0.175:0.85, 0.524:0.9, 0.785:0.9

rudder_scaling_table = -0.785:0.9, -0.524:0.9, -0.175:0.85, 0.0:0.8, 0.175:0.85, 0.524:0.9, 0.785:0.9

 

[FLIGHT_TUNING]

cruise_lift_scalar = 1.15    

induced_drag_scalar = 1.35   

elevator_effectiveness = 0.95 

aileron_effectiveness = 0.92    

rudder_effectiveness = 0.95   

pitch_stability = 1.1        

roll_stability = 1.15          

yaw_stability = 1.1             

pitch_gyro_stability = 2.2    

roll_gyro_stability = 2.2      

yaw_gyro_stability = 2.2       

ground_crosswind_effect_zero_speed = 8 

ground_crosswind_effect_max_speed = 101

ground_high_speed_steeringwheel_static_friction_scalar = 0.5  

ground_high_speed_otherwheel_static_friction_scalar = 0.85      

enable_high_accuracy_integration = 1    

ground_new_contact_model_gear_flex = 0   

ground_new_contact_model_gear_flex_damping = 0  

ground_new_contact_model_up_to_speed_lateral = 8000    

ground_new_contact_model_up_to_speed_longitudinal = 8000   

ground_new_contact_model_rolling_stickyness = 0.2

 

[STALL_PROTECTION]

stall_protection = 1

off_limit = 0.95

on_limit = 0.85

timer_trigger = 2.0

Although I saw that change bit late, it definitely adds more realistic control on ifly738 max. However I noticed that the lnav mode became bit more unstable after those changes. I mean lnav starts the turn,overshoot and turn back to a track to the next point. 

Did you also notice same behavior? Or maybe you did more fine tuning later?

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