Noctua Airflow Amplifier for Different Fan Sizes (with Gopro and tripod mount)

Updated: 2024/07/29

• Added 180mm version (Silverstone AP181, mounting hole spacing 165mm).

Updated: 2024/06/09

• Remodeled the outer surface so now it can be scaled to more different sizes without making the shell too thin or too thick. It shouldn't have (too much) effect on the airflow behavior.
  Additional sizes: 40mm, 50mm, 60mm, and 200mm(154mm hole spacing).
  (I don't have a 200mm fan but if you have one and tried it please let me know! :) )
• Added two new versions with integrated mounting feature:
  1. Modular Gopro mount. The mounting part is derived from Modular Mounting System / GoPro Arms. It uses M5 fasteners.
  2. Tripod mount. Modeled in ¼"-20 UNC thread (6mm deep), which should be compatible with many tripod screws. It's plastic thread, don't over tighten it!

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The NV-AA1-12 from Noctua is tweaked specifically for there NF-A12x25 fans. 
These are just scaled proportionally to fit different fan sizes.
None of the critical features are adjusted or tweaked.

No CFD simulation done! Different fan models with different sizes behave differently. 
These may make you fan perform better or worse. Use it at your own risk.

If you tried any of these, feedbacks are appreciated.

Refer to the “Differences of the remix compared to the original" section for changes made.

The 120mm version is slightly tweaked:

1. Added bottom chamfers to compensate for elephant foot effect.
2. Replaced a bottom facing fillet with a small chamfer to remove the overhanging perimeter.

• Scaled proportionally to various common fan sizes.
• Added corresponding mounting holes.
• Fixed the base thickness after scaling.
• Added some bottom chamfers specifically for FFF processing.
• Oriented the model to match XY axis direction.