I agree with this. However I’ve only seen a handful of data points: one here, two from aerocoach, and one from TTUK forums.

Who?

We’re actually trained up as independent tunnel operators so collect and process the raw data differently than Boardman personnel. There are two organisations operating out of the tunnel - AeroCoach are separate from Boardman and so our sessions have blacked out windows etc (as we work with other bicycle companies and manufacturers in the industry, we have an agreement that Boardman don’t have access to our sessions or the data).

I’m not sure how Boardman collect or process their data but I doubt it’s too different to ours. We’ve been really happy with how the data has tracked with our indoor velodrome, outdoor velodrome and outdoor field/race day data - and worked with Boardman and KWSP (who built the tunnel) before it opened, to check protocols and perform testing to ensure everything was fine. If it wasn’t we wouldn’t be using it!

We can’t release identifiable info about our clients individual CdAs (except for team/sponsored riders), but I can say that we’ve seen <0.160 on the indoor velodrome and outdoor velodrome for both men and women and also <0.160 in the tunnel. When you see something low like 0.17x or under you can often tell! We had a 183cm team rider down at 0.168m^2 recently, that sort of thing does require a lot of attention to detail however.

At the moment we have a fair bit of public data out already/coming out on our 2019 (UCI legal!) clothing project with Nopinz (mostly Facebook and Instagram), including the ubiquitous “arm on a stick” this week! We've also done public disc wheel data and the Conti GP 5000 aero data too.

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AeroCoach UK
http://www.aero-coach.co.uk

 
Hello

183cm guy (6') at 0.168 SCx/CdA is impressive indeed.
I suppose it was disk wheell front and back, track bike, and specific speed suit fabric (UCI compliant ?).

I'm sure progress in textile fabric will continue to bring a lot.

Yes track bike with double discs and UCI legal kit. All the new stuff we're doing is UCI legal as well (thankfully, as we were well underway before the rules got changed!)

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AeroCoach UK
http://www.aero-coach.co.uk

A couple of the HUUB/WattBike boys showed some results in the .15 range on Instagram a few weeks back.

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Alex Arman

Strava

Thanks Xavier

In 2015 I did calculated Alex Dowsett at 0.174 during its Hour Record (also a 183cm guy). Was it near ?

Seemed very low, given relatively "classic" position, but then Dan Bigham said he was .175, so it seems realistic.

Which ones? Not the Tanfields surely....

And note that removing brakes and derailleurs does result in a substantial reduction.

Bigham looks a lot more aero to me. Dowsett has some "magic" aero going on I think...

If Xavier mention 0.168 as the better perf he saw for a 183cm guy on a track bike with double disk, then a CdA below 0.160 come from a smaller guy (or girl). Probably below 175cm.

Yes it was low for his hour record ride - I was track centre at the time with a weather sensor and it started raining outside right before he started, so the air density absolutely plummeted! I think he might have been using a road P2M for the stated 358w.

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AeroCoach UK
http://www.aero-coach.co.uk

Any time frame for the new 2019 skinsuits?

I hope a low yaw version is ready by June. Elite track nationals starts July 2nd.

He was lucky with air density, more than Wiggo :-)
However, 53km/h with 358w is impressive.

Alex was the only one (to my knowledge) revealing HR power average ?

Here is the picture with the very low figures : https://www.instagram.com/p/BpnGuiMFViF/

The comment mention Dan Bigham CdA. The one designated by the finger ?
I don't think so. Dan is 183cm / 75kg (from British Team site), so I guess Dan is the CdA 0.168 183cm guy mentioned by Xavier.
1 or 2 years ago Dan indicated being .175, so make sense.

The figures from the pictures are at yaw ? Don't know.
Sometime 5° and 10° yaw CdA lower than 0°yaw CdA, see this post :
https://forum.slowtwitch.com/...da_target_P5496638-5

About UCI rule (pad / tip of aerobar height being +/-10cm), don't know if it is still valid, but looking at Dan and other Huub Wattbike riders, know how they avoid it to go high mantis :
1) 2 or 3 fingers lay above the top of the bar : 3 to 4 cm gain
2) pad is situated upper in the bar, elbow being significantly below bottom of pad : 3 or 5 cm more...

In LD tri, life is easier for high mantis :-)