6 hours ago, blingthinger said:

I was actually talking about generating a CFD grid around the landing gear: very complicated...but the landing gear/momentum discussion is good dirt!

I know you did not exactly talk about that, but I found it was fitting in a way. Honestly, I don't fully understand the problem with the landing gear when he refers to it as "on the ground" vs "in flight". Is it about drag?

5 hours ago, tweekz said:

I know you did not exactly talk about that, but I found it was fitting in a way. Honestly, I don't fully understand the problem with the landing gear when he refers to it as "on the ground" vs "in flight". Is it about drag?

First of all, you quoted what looks like a forum post. Do you also have the source URL?

I wondered that same thing. I think there's also a bit of translation difference too: I think "momentum" maybe should be "moment". But either way, it sounds like they are describing a nose-down rotation being applied to all aircraft to simulate the landing gear being extended, though they make it sound like it's also there when the gear is up?? That doesn't make sense though because aircraft noses pitch up when gear is raised in all the aircraft I've flown. So it must be reduced or turned off when gear is raised. And when it's extended, the nose is artificially rotated downwards. This would obviously also contribute a downward force on the gear itself and would change friction effects on the struts and tires when on the ground. So it would pretend to be a drag force because the gear is on the bottom of the fuselage which would drag the nose down: negative pitching moment.

1 hour ago, blingthinger said:

First of all, you quoted what looks like a forum post. Do you also have the source URL?

https://forums.x-plane.org/index.php?/forums/topic/139883-flight-factor’s-dev-opinion-on-xplane-flight-dynamics/

Didn't provide the original source.

Edited September 15, 20223 yr by tweekz

10 hours ago, tweekz said:

https://forums.x-plane.org/index.php?/forums/topic/139883-flight-factor’s-dev-opinion-on-xplane-flight-dynamics/

Didn't provide the original source.

Mmm...unfortunately that isn't a source either. They copied from somewhere else too but didn't provide their actual source. They supposedly quote Austin but then declare they want to know his opinion? If it's flight factor talking, I would think it would be in their forums somewhere. I definitely have questions though if it is real.

The fact that the lead FM developer / programmer from 1C / 777 - Petrovich - just joined ASOBO is really fresh air for a team where real understanding of flight dynamics and overall aircraft systems is not up to the level of the graphics / scenery...

This is probably the biggest step in making MFS more stable / plausible in terms of flight dynamics that MS / ASOBO has made. Let's hope for Petrovich to feel inspired... I believe he'll have to review much of what and how it's being used which will surely take it's time, but will probably converge into something really interesting.

I still consider the flight dynamics in IL-2 an example.

Edited September 16, 20223 yr by jcomm

35 minutes ago, jcomm said:

The fact that the lead FM developer / programmer from 1C / 777 - Petrovich - just joined ASOBO is really fresh air for a team where real understanding of flight dynamics and overall aircraft systems is not up to the level of the graphics / scenery...

This is probably the biggest step in making MFS more stable / plausible in terms of flight dynamics that MS / ASOBO has made. Let's hope for Petrovich to feel inspired... I believe he'll have to review much of what and how it's being used which will surely take it's time, but will probably converge into something really interesting.

I still consider the flight dynamics in IL-2 an example.

That is interesting. Although I’m not a rl pilot, IL2’s fm feels most intuitively real to me out of all the sims (although I haven’t played about with it’s weather and subsequent effects very much).

Edited September 16, 20223 yr by scotchegg

2 hours ago, scotchegg said:

That is interesting. Although I’m not a rl pilot, IL2’s fm feels most intuitively real to me out of all the sims (although I haven’t played about with it’s weather and subsequent effects very much).

Indeed @scotchegg, my preferred flight simulator in terms of feel of flight, even superior as a combat flight sim, less the helicopters and modern jet fighters, to DCS World.

My only problem with playing IL2 is "mental" - it is hard for me to play with something that represents such a dark side of Human Kind... War ..., athough I have special admiration / interest in WW2 aircraft of all types, from gliders to bombers ...

From time to time, when I get frustrated with the limitations of the FMs in the other sims, I load IL2 for a few circuits, under different weather conditions, and it feels really Special / Unique!

Edited September 16, 20223 yr by jcomm

Yesterday I watched a stream from V1 flying the ToLiss in XP12 and I have to say, honstly I think the flight dynamics of the Fenix are actually better. There is something that I think was already there in the XP11 version. At rotation the ToLiss seems to glue on the runway and after coming loose, the nose rises too fast. At landing it seemed almost as floaty as MSFS.

Only thing that is definitely better than in MSFS is less tilting around the CG, which is just unrealistic for a aircraft that is a dozens tons heavy. Also watch how smooth the takeoff-roll looks compared to MSFS.

Here's the video, starting from takeoff:

 

Edited September 16, 20223 yr by tweekz

3 hours ago, jcomm said:

The fact that the lead FM developer / programmer from 1C / 777 - Petrovich - just joined ASOBO is really fresh air for a team where real understanding of flight dynamics and overall aircraft systems is not up to the level of the graphics / scenery...

This is probably the biggest step in making MFS more stable / plausible in terms of flight dynamics that MS / ASOBO has made. Let's hope for Petrovich to feel inspired... I believe he'll have to review much of what and how it's being used which will surely take it's time, but will probably converge into something really interesting.

I still consider the flight dynamics in IL-2 an example.

Great move! This will most definitely help Asobo improve the flight model where it's still lacking, and probably take the lead in this crucial area. Might take a while till the results come to fruition, but ultimately this will satisfy even the most demanding simmer, I guess (or hope?)

Thanks for letting us know!

Edited September 16, 20223 yr by pstrub

5 minutes ago, pstrub said:

Thanks for letting us know!

It was actually something I learned yesterday from the linked post at  AVSIM's Hangar Chat forum 🙂 

2 minutes ago, jcomm said:

It was actually something I learned yesterday from the linked post at  AVSIM's Hangar Chat forum 🙂 

Deserves its own thread here in the MSFS corner 😉 

ok, I saw @rka asked to move the thread from Hangar Chat to here, but this hasn't happened yet.

Edited September 16, 20223 yr by pstrub

29 minutes ago, tweekz said:

Yesterday I watched a stream from V1 flying the ToLiss in XP12 and I have to say, honstly I think the flight dynamics of the Fenix are actually better. 

I know nothing of the toliss but if the fenix is better then it’s in really bad shape.

The fenix has takeff pitch wrong, roc wrong, drag wrong, FF wrong, pitch/power curve wrong….can be easily observed if you go for “unreliable airspeed “ procedure or just for fun attempt to simulate an engine failure.

8 minutes ago, ha5mvo said:

I know nothing of the toliss but if the fenix is better then it’s in really bad shape.

The fenix has takeff pitch wrong, roc wrong, drag wrong, FF wrong, pitch/power curve wrong….can be easily observed if you go for “unreliable airspeed “ procedure or just for fun attempt to simulate an engine failure.

Just watch the rotation. Another thing I noticed back in XP11 days. When initiating the descend it went rapidly down to -4000ft/min, before slowly revovering to about 2000ft/min. Not an Airbus pilot, but that doesn't seem like what I feel as a passenger.

The Flight Factor is much better. It uses an external flight model.

Edited September 16, 20223 yr by tweekz

If that YouTuber is a "Real Airbus Captain" please let me know what airline he flies for so I can avoid it in future 😉

Switching runways at the last moment?

Unstable approach - GO AROUND

Too low - four reds - GO AROUND

Edited September 16, 20223 yr by TrafficPilot

Judging a flight model from watching a video?...Hmmm