I made some search to see if CdA of same rider with different yaw was available.
Because it make sense to test at some yaw. In real life, in most case some wind not in the same direction as we are, so 5° yaw is probably more realistic than 0° yaw.
At least for a triathlete, not a pursuiter.
And all comparisons at same yaw make sense.
I mean, if Mistral is 2w faster than S-Works at 30mph 5°yaw, will be same on the road.
If this suit faster than this one at 5° yaw, will be same on the road.
But my question was : is 5° yaw deliver better or worse CdA than 0° yaw ?
Just to know.
And especially, can I compare Allan very low CdA to other CdA at 0°yaw, or calculated from real conditions ?
So, find this :
https://www.researchgate.net/...n_Experimental_Study Interesting research done at 0, 15, 30, 45° ... until 90°.
Worst CdA is at 15°, but :
not a lot of granularity in measurements
CdA increase much at 15° if torso is higher, not as much if torso is lower
And also this :
https://forum.slowtwitch.com/...da_target_P5496638-5 Graph from Andrew Coggan (page 5) show that :
for Superman position, CdA increase at yaw (5 and 10°)
while
for classic aero position, CdA decrease at yaw (5, 10 and 15°)
OK, so conclusion is..... it depend....
Most probably Allan CdA at 5° yaw is probably very similar to his CdA a 0° yaw.
Slightly higher or lower... don't know.
Side note : was also very surprised to see for "bike only measurements" some drag graph (not CdA graph, but drag in grams) lowering at yaw, some other going up at yaw... strange.