Air flow and coil placement in RDA

Regarding air flow in RDAs, I have been wrong. Well, most of us have. I have made a wind tunnel, or a mock-up of several RDAs. This video explain it all with footage and drawings.

The speed we vape at:

I have now quantified some of my findings. My vacuum cleaner for my air chamber experiments, is dragging in air at 24 mph. A human sneeze is about 39 mph. I managed to blow at 33 mph only once. 28 mph is my average max for blowing. My max average for inhaling is 21 mph.
A steady 5 secund blow or inhale has the average speed of 16 mph. I tested 4 adult non-smokers and myself.
We tested two straws also, with the combined opening of a Dead Rabbit RDA. The average speeds for 5 sec inhale/ exhale was still 15 mph. Opening did not change the speed of the air.
All this means that the effects of turbulence you see in my air chamber experiments, is worse in an RDA. Placement, and a more or less smooth surface on your coils is very important. Clapton coils should never have a thicker wrap wire than 36-40g, and never be stapled or tiger'ed or anything fancy. Twisting and counter twisting wire is the worst you can do. My experiments show that the air behave like hitting a flat wall in those cases.