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Double raDouble racks for AIM-120 and additional missiles have no drag


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Posted (edited)

Both configuration of Hornet:

 

2 x AIM9 + 6 x AIM120 on single racks = 455kts TAS / 1.0Ma max speed

(track attached)

2 x AIM9 + 10 x AIM120 on double racks = 455kts TAS / 1.0Ma max speed

(track attached)

 

Identical speed thus supersonic drag. (default weather, no wind, 20000 ft standard day Cauasus in this case)

 

Why? Are 4 additional AMRAAMs dragless? Not exactly.

 

Because single racks have massively bigger drag than double racks in DCS at this moment.

f5414674d1b5f.jpg

cb0ac5bc954b7.jpg

 

Clean config + 4 single empty racks = 517kts TAS / 1.14Ma

(track attached)

Clean config + 4 double empty racks = 553kts TAS / 1.22Ma

(track attached)

 

 

Which is impossible IRL for double rack to be less draggy because double rack is the same LAU-115 single rack with additional 2 sub racks on it.

vfa151-27b.jpg

Hornet 6x120+2x9 drag.trk

Hornet 10x120+2x9 drag.trk

Hornet 4 single racks drag.trk

Hornet 4 double racks drag.trk

Edited by bies
  • 2 months later...
Posted

Just want to bump this. Did my own tests recently and the results seem to match OP. I can post track files if requested.

 

I don't know how the drag modeling system is designed under the hood, but I do find it interesting that the single-racked versions of the LAU-115 for the AIM-120 and AIM-7M are named "LAU-115" in the mission editor, while the equivalent for single-racked Sidewinders and other Sparrow variants is named "LAU-115C". Maybe that has something to do with it?

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