Aerodynamics / Aerodynamic Cost / Aero parts

OmegaX looks shit on a classic P3

And on a P2, apparently :-)

You can get it tight to the fork crown like the original one if you use a hanger:

Yeah it that. Speaking of hangers, are you making an integrated topcap/hanger for for Nutshell?

are you making an integrated topcap/hanger for for Nutshell?

I've done my bit, just waiting for the miller to do his. I'm hoping they'll be finished soon, they're already two weeks overdue.

Milling has started

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One-off, or available to the hoi-polloi?

One-off, or available to the hoi-polloi?

Nutshell will have a few spare ones for sellz

Someone on TTF was asking about angling the extensions up and this article was linked to.

Has anyone experimented?

Having just bought Ventus, I'm hoping to hear it's rubbish...

It's very individual. You can achieve that position on Ventus with reverse mounted 30/40/50 degree USE extensions though.

Reading that article it does say that a degree or two makes a big difference.

reverse mounted 30/40/50 degree USE extensions

I get what you meant now (in your CP I think): you turn them around, back-to-front.

And thinking about it, I had the Vuka angled up as it was more comfortable.

@mdcc_tester Those hangers are designed to integrate TriRig OmegaX with your low stack headset cover and the head-tube of older Cervelo models (P2,P3 etc.), right?

@Scilly.Suffolk When I went to see Xav we tried slightly raised hands and they seemed to work for me but I haven't been able to fit new extensions yet. The photos in that article show that they've also been rotating the angle of the pads so that they remain parallel to the extensions, however in other photos (e.g. Mork?) I've seen them keep the angle of the parallel to the ground and just raising the hands. I'm not sure what I'd prefer from a comfort/handling perspective.

I can't think having the extensions and the pads at different angles is very comfortable. I suppose you could bulk-up the pads with some more foam.

I'd like to try "ski-jump" extensions at some point, which will give me the opportunity to raise my forearms and I'll find out then just what the limit is with horizontal pads.

Those hangers are designed to integrate TriRig OmegaX with your low stack headset cover and the head-tube of older Cervelo models (P2,P3 etc.), right?

Yes.

They're off the mill and have gone up to Uxbridge to have a bath

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Ooooh... very pretty, how many did you make? How much faster will OmegaX make me compared to a set of standard Ultegra brakes?

How much faster will OmegaX make me compared to a set of standard Ultegra brakes?

I think we're talking a couple of watts at whatever speed Dr Coggan's mini wind tunnel does.

There are 5 of the hangers, I don't know how many Nutshell wants to sell or what he wants to charge for them.

Out of interest, does anyone know (or could make an educated guess at) what difference to aerodynamics a set of 45mm SKS Longboards will make?

Just found the original Omega white paper which says about 5second gain over 25mile TT. That probably isn't worth £130 at the moment, but the hanger is a neat design :-).

...

the hanger is a neat design

It's photographed from its best side

very rough estimate:

ignoring interference and shielding (from the tyre):
Front fender drag coefficient : 2.3
(shape 20)

area: 0,045m x 0,4m = 0,018m2
cda of front fender= 2.3 x 0,018 = 0,0414
which is (via drag to watts calculator at the bottom of the page)

= about 14 watts at 30km/h so less than that :) (because it is behind the tyre)

if only considering the 2 cm it sticks out wider than the tire: about 6 watts at 30km/h for the front fender

edit:
or apparently buy Bicycle Quarterly Vol. 6, No. 1 and Vol. 6, No. 3. and find out ->
https://janheine.wordpress.com/2012/05/02/aerodynamics-of-real-world-bicycles/

http://djconnel.blogspot.dk/2011/04/aero-road-frame-versus-front-fender.html

there is also these:

http://www.bikerumor.com/2015/09/02/eb15-birzman-guards-against-spray-with-worlds-most-aero-fender/

most aero fender least unaerodynamic fender

Bicycle Quarterly done a test in a wind tunnel actually, will find the article when I can

Cheers for all the mudguard opinions/facts/estimates. Looking forward to more info, is the rear mudguard (assuming 50% coverage of the wheel) pretty much aero-neutral?