hi , we did a bit of a test to see if there was any differace in aero helmets we have
one is wing dream , one is the wing
done by myself and my partner on a out n back course 1min apart about 9.2k in total (unforunatly she stopped at a different spot slightly short biut at the same spot each time , and also she lapped at the turn around as i lapped the whole out n back )
we both ride exactly the same bike (trek SC gen 3) same PM (power to max) tyres wheels etc , pretty much the same height and weight and a very similar position
we did 4 out n backs 2 with each helmet but rotated each time
out was slightly up hill , but into a slight head wind which did pick up slightly as we went on
from what i can see is that she is slighty more aero than me and also there seems to be no difference in the helmets
if anything the the wing is better for me and the wing dream may be better for her but doesnt seem to be a great deal in it
any thoughts ? or was this just a waste of time
her
A wing dream
9MIN40 4.59k 28.5kph 152np (out)
7 min32 4.43k 35.3kph 151np (back )
B the wing
9min03 4.35 28.8kph 156np (out)
7min51 4.38 33.5kph 147np (back)
Nope, it won’t be. Not enough data, it looks like they were probably getting warm, one direction had an uncharacterized head wind or a hill in one direction.
I did outdoor aero test using the Wing and the Dream. For me the Dream had a lower CdA of .006, which is not insignificant, but you need a good sensor to tease it out.
How did you estimate the 3% improvement on him? Results of Runs C and D “look” identical. While A and B make the Dream “better” but when comparing the pCdA to C and D, it seems as if maybe wind or something else could have been skewing the results?
@Engner66 that’s sorta the way I see it but I have no idea at all , so happy for any thoughts
The wind did pick up on the last two runs but it was a head wind pretty much and not that strong just stronger than the first two runs
@david yes as helmets are very different for each person we where trying to see if there was any differences in the two helmets with myself and my partner
Be good to get some input from others on our “data”
Take this with a grain of salt: I don’t have a ton of experience doing tests other than my own bro-science tests including helmets. In my humble opinion, the differences shown for both of you are not significant enough to have a clear winner between the two. I would go with the Dream simply because it’s a newer helmet and I like the look of it
Next time, for comparison and for fun if you are a nerd like me , try a “Baseline” helmet such as a non-aero with a ton of holes to really get a feel for your test runs accuracy level. You will see a significant difference between the baseline and any of the aero ones.
@Engner66
Yes I’m like u
I have no idea but I think by looking at the data there doesn’t seem to be a lot in it
She likes the dream as it more comfy and the vision is amazing
Will try and add in a “normal “ helmet next time to see the difference
Cheers
I mentioned it because when I did my own testing, could not find much between Javelin, Aerohead (other than heavy and hot), and Rapid Tri. Was worried my test protocol simply wasn’t sensitive enough. However, when I uadded the Air Attack Shield to the roster, the difference was as clear as daylight, the Attack was significantly slower than any of the other three.
, try a “Baseline” helmet such as a non-aero with a ton of holes to really get a feel for your test runs accuracy level. You will see a significant difference between the baseline and any of the aero ones.