Aces High Bulletin Board
General Forums => Aces High General Discussion => Topic started by: Skyyr on May 07, 2014, 02:33:13 PM
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A few of us were discussing various aircraft and this thread came up:
http://bbs.hitechcreations.com/smf/index.php/topic,185075.msg2330612.html#msg2330612
There are several references to the "drag model" being updated. What was changed, exactly? Is this is a mistake? Or was it actually updated?
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See Rules #2, #4
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There are several references to the "drag model" being updated. What was changed, exactly? Is this is a mistake? Or was it actually updated?
It refers to the a global flight model update in 2006. Can't remember any technical details at the moment though...
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See rule #4
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We changed methodology to better fit drag curves overt the entire flight envelope.
The net effect was less induced drag.
Beyond that , I will not elaborate on the specifics.
HiTech
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It refers to the a global flight model update in 2006. Can't remember any technical details at the moment though...
Pretty sure it refers to the change that happened in 2000. Version 1.04 IIRC.
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We changed methodology to better fit drag curves overt the entire flight envelope.
The net effect was less induced drag.
Beyond that , I will not elaborate on the specifics.
HiTech
If I may ask (without specifics), was the effect of less induced drag due to a redistribution of the curves? Or was it simply adjusted as needed, in specific ranges of flight envelopes?
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I believe the 190a5 should have the same drag characteristics as 7.62x54rd... If that is not acceptable, I'm good with matching it to a 5.56rd.. thx
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I believe the 190a5 should have the same drag characteristics as 7.62x54rd... If that is not acceptable, I'm good with matching it to a 5.56rd.. thx
That was very helpful. Thanks.
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I believe the 190a5 should have the same drag characteristics as 7.62x54rd... If that is not acceptable, I'm good with matching it to a 5.56rd.. thx
I'd prefer the drag curve over the entire flight envelope to be .14X.222. I win.
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If I may ask (without specifics), was the effect of less induced drag due to a redistribution of the curves? Or was it simply adjusted as needed, in specific ranges of flight envelopes?
Just curious. It was changed 8 years ago, what does it matter?
Wiley.
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Just curious. It was changed 8 years ago, what does it matter?
Wiley.
Curiosity would seem to be enough. Comparing.
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We changed methodology to better fit drag curves overt the entire flight envelope.
The net effect was less induced drag.
Beyond that , I will not elaborate on the specifics.
HiTech
Sounds more like an increase in simulation fidelity, not a "change" per se. Every time fidelity/resolution is improved the end result will differ slightly from previous, less accurate results.
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Sounds more like an increase in simulation fidelity, not a "change" per se. Every time fidelity/resolution is improved the end result will differ slightly from previous, less accurate results.
Hypothetically speaking... If induced drag is modeled improperly by a greater proportion, how is that an improvement?
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Let's not speak hypothetically. If you have a specific issue or grievance, voice it. Don't dance around it with "hypothetical".
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See rule 4
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Hypothetically speaking... If induced drag is modeled improperly by a greater proportion, how is that an improvement?
It was demonstrated that induced drag was too high. HTC fixed that, but nobody, including HTC, claims that AH is perfect. If you think otherwise about induced drag in AH it is all on you to support that claim.
In other words, put up or **** up.
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See rule 4
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Let's not speak hypothetically. If you have a specific issue or grievance, voice it. Don't dance around it with "hypothetical".
:rofl
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See Rule #2
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See Rule #2
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If i am correct, the changes mostly effected the aircraft in the areas of drop tanks,rocket rails and bomb equipment. Even if the Aircraft itself doesn't model the code by eye candy, the effect* is still there. As in, even loading a bomb or DT will "add" that component to the plane, as in increased drag on the drop tank,and rails..as well as weight. Without or without the component being dropped, even if you drop your DT, even having the shakles for it ad's drag and weight. how much? test and find out. ;)
I found my P39Q without .50 gondolas & Dt removed can get better range with constant engine management "and better speed" then it ever could with the DT. Figure that math out.
If i remember the it correctly. :rock
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See Rule #2
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Just curious. It was changed 8 years ago, what does it matter?
Wiley.
Because of this thread:
http://bbs.hitechcreations.com/smf/index.php/topic,358107.0.html
It was mentioned that the actual formula for induced drag was used as the direct code for drag modeling, yet it was mentioned above that "curves" were adjusted. Obviously, you can't have both and have it be 100% accurate, so there is some intermediate modeling going on. My question was what is that modeling and by how much is it adjusted.
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Because of this thread:
http://bbs.hitechcreations.com/smf/index.php/topic,358107.0.html
It was mentioned that the actual formula for induced drag was used as the direct code for drag modeling, yet it was mentioned above that "curves" were adjusted. Obviously, you can't have both and have it be 100% accurate, so there is some intermediate modeling going on. My question was what is that modeling and by how much is it adjusted.
Now I'm curious. Knowing this will help you how? Or are you just wondering about the finer points of flight modeling?
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Now I'm curious. Knowing this will help you how? Or are you just wondering about the finer points of flight modeling?
Call it curiosity at this point.
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Call it curiosity at this point.
(http://i239.photobucket.com/albums/ff107/tymekeepyr/funny-curiosity-killed-cat-head-in-pinata-pics_zpsbafb70a0.jpg) (http://s239.photobucket.com/user/tymekeepyr/media/funny-curiosity-killed-cat-head-in-pinata-pics_zpsbafb70a0.jpg.html)
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See Rule #2
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There's a picture of the numbers over a F4U's wing showing the modelling, sadly I don't have it, but I'm sure that picture that exists would help this discussion if anyone has it.
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Call it curiosity at this point.
He says in a thread about drag models.
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See rule #2
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Call it curiosity at this point.
As I said in my response, I am not speaking any more about the details of how we do modeling.
HiTech
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See rule #2
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As I said in my response, I am not speaking any more about the details of how we do modeling.
HiTech
Without going into specific detail about the drag modeling, could you explain the difference between the old drag model and the updated one?
ack-ack
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See rule #2
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Strange thread... I will say no more, other than: the modeling is closely guarded and it looks like people need to respect that.
So, Skuzzy, why don't you just put this one out of its misery - and I'm not tryin gto back-seat moderate, just asking?
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Without going into specific detail about the drag modeling, could you explain the difference between the old drag model and the updated one?
ack-ack
Sorry I can not Ack Ack, a lot of how we do modeling is fairly unique, and I treat it as a trade secret.
HiTech