In my experience it rarely works the way you would like. I tried to smooth the area at the bottom of the aerobars to get the air to cleanly move under that bars and pads, rather than just having a messy area where some air would be hitting the pad holders and the misc un-aero stuff around there. I tested it in the wind tunnel and it was a bit slower. Probably two reasons. 1) You are increasing frontal area and drag is CdA. 2) the air that is coming off you forearm area tends to like to flow under your elbows, along the top tube, and out past the seat post. Fairing this area tends to push the airflow onto other bits of the frame.

I am not saying this can't work, but it isn't straight forward or a likely aero gain.

Thanks, I thought that might be the case, best to try and keep that area clean then.

+1

It’s why we all aren’t running one of these: https://www.bikeradar.com/...key-and-bauer-12593/

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

Check out the rules of what you make as it can be open to the officials discretion on the day of what is deemed legal or not and you may have to pull it off. Read the article of my mate who made a similar thing for Kona and after review he had to pull it off on race day. Read the article and check the link in the comments to his mosh too.

http://www.slowtwitch.com/Interview/The_tinkerer_Isaac_Tonello_4730.html