All FC3 aircrafts show GS instead of IAS in wind

If you flying in a crosswind or headwind your IAS (indicated airspeed) is wrong, it shows GS (ground speed) instead! in ALL FC3 aircrafts (other 3:rd party models too)

A fundamental error by ED that I posted about 6 months ago here: http://forums.eagle.ru/showthread.php?t=122636

& here: http://forums.eagle.ru/showthread.php?t=122387

& nothing is being done about that?

This error effects your crosswind landings, stall speed & flight dynamics!

So why isn't ED doing something about it? they claim to have "unmatched flight physics"....?

"A fundamental error by ED that I posted about 6 months ago"

Its true, there are a few bugs that have persisted for longer than some people would like, and I know it's irritating when the one that annoys you personally the most isn't seen as the one with the highest priority by others, but in this case it hasn't been.

"So why isn't ED doing something about it? they claim to have "unmatched flight physics"....? "

Actually, it doesn't change the flight physics any more than an incorrect gauge on a real aircraft would change its physics, but it does make relying on your airspeed indications at landing 'problematic', and should be fixed.

And I'm sure it will be - when they get to that part of the list :)

I was literally just learning about IAS in the Su-27 manual, not knowing that it isn't implemented properly. Is this also a problem for the A-10C, or is it just FC3?

I was literally just learning about IAS in the Su-27 manual, not knowing that it isn't implemented properly. Is this also a problem for the A-10C, or is it just FC3?

I've made a new entry on the subject in the system as a bug.

"So why isn't ED doing something about it? they claim to have "unmatched flight physics"....? "

 

Actually, it doesn't change the flight physics any more than an incorrect gauge on a real aircraft would change its physics, but it does make relying on your airspeed indications at landing 'problematic', and should be fixed.

And I'm sure it will be - when they get to that part of the list :)

How can you be sure? are you an coder of the aerodynamics in DCSW?

The FDM code must take account of the speed of the airplane, what speed I don't know...IAS, CAS, TAS, GS, EAS?

Of course it affects the FDE, if that incorrect speed, assuming it's IAS, is feeded in to the FDE program calculations....it affects Airplanes FDM, missile FDM, bullets and bombs trajectory etc etc etc! Please explain?

Anyway thanx for reporting this bug!

facing wind takeoff, IAS sudden change

Data tools from:

http://forums.eagle.ru/showpost.php?p=2234154&postcount=28

Hi Rod,

"How can you be sure?"

I performed some tests then I gave you the answer they indicated.

"Of course it affects the FDE, if that incorrect speed, assuming it's IAS, is feeded in to the FDE program calculations....it affects Airplanes FDM, missile FDM, bullets and bombs trajectory etc etc etc"

You're assuming the numbers reported in the GUI are the numbers used in the various FM calculations, and yes - if that were true - it would have the potential to impact all those things.

As it turns out, it appears to impact some, and not others.

The FM appears to use the correct figure.

"are you an coder of the aerodynamics in DCSW?"

Now I have to ask you a question - Is that a serious question, or a wind up ?

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"facing wind takeoff, IAS sudden change"

2 things - 1 is the bug mentioned above which seems to be with the values passd back to the player.

The other you might not have noticed, but it seemed from that testing I mentioned above that windspeed drops somewhat as you get quite close to the ground - roughly as you transition through WIG effects, so there may always be a discrepency between what you see as the wind from your instruments while sitting on the ground, the wind as reported by the tower, and the wind set in the ME.

Hi Rod,

 

"facing wind takeoff, IAS sudden change"

 

2 things - 1 is the bug mentioned above which seems to be with the values passd back to the player.

 

The other you might not have noticed, but it seemed from that testing I mentioned above that windspeed drops somewhat as you get quite close to the ground - roughly as you transition through WIG effects, so there may always be a discrepency between what you see as the wind from your instruments while sitting on the ground, the wind as reported by the tower, and the wind set in the ME.

From the in-game data graphic above,

I can not read the 'discrepency' until the takeoff moment.

So, it's a reasonable guess that IAS source is different between 'on ground' and 'in air'.

Another problem in the graphic, TAS > IAS when the plane is flying heading wind , is it right?

Hi Rod,

"are you an coder of the aerodynamics in DCSW?"

Now I have to ask you a question - Is that a serious question, or a wind up ?

It was a serious question. I hoped you could explain the FM coding, what speeds it's based on & so on.

The SU-27 test: http://forums.eagle.ru/showthread.php?t=133727

OK the bug is reported so let's hope for the best!