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Bianchi Hyperbike w/ air deflectors
 

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dan emery
Joined: 11 Jan 2004
Posts: 6739
Location: Maine

10/21/22 8:24 AM

Bianchi Hyperbike w/ air deflectors

My brother sent me this:

https://www.designboom.com/technology/bianchi-oltre-rc-hyperbike-uses-air-deflectors-10-19-2022/


He still has a celeste '74 Bianchi.

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Sparky
Joined: 08 Dec 2003
Posts: 18640
Location: PDX

10/21/22 9:36 AM

Yeah, thread about that one went rogue on Paceline..

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Nick Payne
Joined: 10 Jan 2004
Posts: 2582
Location: Canberra, Australia

10/21/22 4:29 PM

In this country, the price of the top-specced version is apparently going to be just under $A30000.

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RCoapman
Joined: 09 Feb 2005
Posts: 4905
Location: Back in the snowy homeland

10/24/22 5:15 AM

Soooo....if I glue some plastic bits to my headtube I'll be faster?

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Sparky
Joined: 08 Dec 2003
Posts: 18640
Location: PDX

10/24/22 10:21 AM


quote:
Soooo....if I glue some plastic bits to my headtube I'll be faster?


Where do we sign up?

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RCoapman
Joined: 09 Feb 2005
Posts: 4905
Location: Back in the snowy homeland

10/24/22 11:52 AM

Terrible write up

https://www.designboom.com/technology/bianchi-oltre-rc-hyperbike-uses-air-deflectors-10-19-2022/


quote:
the air deflectors channel the airflow and create a low-pressure zone at the rear of the tube itself


Um....a low pressure zone at the rear of the tube is the very definition of aerodynamic drag in cycling...so how is this advantage? This is precisely the same effect as the camber of a plane's wings that creates lift in the direction of the low pressure area...so really they are saying this will slow you down. Derp.

Now, not saying the bike isn't fast or that this gimmick (I'm assuming it's a gimmick) doesn't work because I have no evidence one way or the other but the way they've written it shows some serious lack of understanding.

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Sparky
Joined: 08 Dec 2003
Posts: 18640
Location: PDX

10/24/22 12:08 PM

The proportion of total drag of the rider and machine of this aspect, well I have a hard time seeing it as being cumulatively beneficial.

That said, how many here have been riding aero wheels 20_ years? And know the windy day ride effect is notably less dangerous on last 10ish years worth of wheels than prior..

I note the ones I have with no point at the spoke bed are not nearly as terrible...

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KerryIrons
Joined: 12 Jan 2004
Posts: 3180
Location: Midland, MI

10/25/22 3:27 PM

Business physics


quote:
Um....a low pressure zone at the rear of the tube is the very definition of aerodynamic drag in cycling...so how is this advantage?


It's what I learned in my career as "business physics." It exists in the marketing department and ad copy, but not in the real world. It is unencumbered by actual physics and of course costs a lot less to study and implement.

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Nick Payne
Joined: 10 Jan 2004
Posts: 2582
Location: Canberra, Australia

10/26/22 7:02 PM

I notice that the UCI have stated that it can't be used in any of their races...

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Sparky
Joined: 08 Dec 2003
Posts: 18640
Location: PDX

10/26/22 7:11 PM

It is so fast the UCI won't allow it in competition, quick.. get in line....

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PLee
Joined: 08 Dec 2003
Posts: 3700
Location: Brooklyn, NY

11/9/22 3:26 PM

It might actually reduce the eddies behind the head tube, resulting in a drag reduction.

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Sparky
Joined: 08 Dec 2003
Posts: 18640
Location: PDX

11/9/22 4:17 PM

What, .0007% total drag improvment?

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RCoapman
Joined: 09 Feb 2005
Posts: 4905
Location: Back in the snowy homeland

11/10/22 3:27 PM


quote:
What, .0007% total drag improvment?


That's worth several thousand dollars to some people

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KerryIrons
Joined: 12 Jan 2004
Posts: 3180
Location: Midland, MI

11/10/22 3:42 PM


quote:
What, .0007% total drag improvement?


Come on. It's at least 0.0008%. Don't be such a cynic.

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