Drag modeling - what was changed?

[Skyyr]

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?

[craz07]

See Rules #2, #4

[Lusche]

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...

[Skyyr]

See rule #4

[hitech]

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

[Karnak]

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.

[Skyyr]

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?

[kappa]

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

[Vraciu]

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.

[Changeup]

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.

[Wiley]

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.

[Vraciu]

Just curious.  It was changed 8 years ago, what does it matter?

Wiley.

Curiosity would seem to be enough.   Comparing.   

[GScholz]

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.

[Vraciu]

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?

[GScholz]

Let's not speak hypothetically. If you have a specific issue or grievance, voice it. Don't dance around it with "hypothetical".