A serious bug has crept into the drag calculation system for Microsoft Flight Simulator 2024’s Sim Update 7 release that affects some (or perhaps all) third party aircraft. If you’ve taken out an aircraft on a recent flight and been having trouble slowing down for landing…. its not just you.

Problem reported, a fix on the way

Raul, the lead developer behind FSReborn, reported a bug on October 12 indicating that drag profiles for aircraft had been thrown significant out in the Sim Update 7 release than from previous releases. The test example was his Phenom 300E business jet:

Phenom max speed at FL450 is match .78, with SU7 is going .793 and in occasions well into the RED tape.

Alex from SimWorks Studios followed up confirming the problem with their products as well.

I can confirm that our testers see vastly different numbers in SU7 vs SU6 with the FS24 PC-12. Cruise speeds are 5-20kts faster, with error increasing with altitude. Power off gliding was also much better than it should be.

Users have reported issues across other products as well so the problem appears to be widespread with some users saying its all of their aircraft that are affected.

For their part, Microsoft and Asobo have been fast in responding with Eric from Asobo registering the bug after a few questions back and forth on the forums.

Hi everyone,

We have identified an issue in the drag calculation and a fix candidate is being tested.

I dont’t have an ETA for this fix right now.

Best regards,

Eric / Asobo

Let’s hope that issue is resolved quickly. You can see the commentary on this forum thread.

Other issues have also cropped up with Sim Update 7 with products like Flight FX’s Hawker 800XP and its Working Title based PL21 having seen its NAV/FMS1 guidance broken when entering arrival information. Flight FX have reported that Asobo is aware of the issue.

Hopefully, we’ll see these avionics glitches and drag performance problems sorted out in a hotfix!