Think you're aero?

Individual and Team TT

Think you're aero?

Postby JV911 » Mon May 04, 2009 4:16 pm

<---LACC--->
<---BMC SLR01--->

User avatar
JV911
 
Posts: 5451
Joined: Mon Sep 01, 2008 1:22 pm
Location: Sydney, Australia

by BNA » Mon May 04, 2009 4:38 pm

BNA
 

Re: Think you're aero?

Postby Ant. » Mon May 04, 2009 4:38 pm

I'm surprised anyone can be so aero with his lack of saddle-bar distance.
Cervélo R3
Cervélo P3C
BT Blade
Ant.
 
Posts: 758
Joined: Sun Oct 26, 2008 8:34 am
Location: Perth

Re: Think you're aero?

Postby Andrew69 » Mon May 04, 2009 5:46 pm

Have a look for some of the photos of Jayson Austin (Masters 1 hour WR holder who I posted about in the general discussion section) and check out his position.
Jayson doesnt run much drop, but also has a CdA of ~0.185 (very, very aero)
2007 Orbea Aspin
2008 Cervelo P3C
User avatar
Andrew69
 
Posts: 300
Joined: Thu Jun 07, 2007 6:36 pm

Re: Think you're aero?

Postby sogood » Mon May 04, 2009 5:51 pm

I understand that width matters when it comes to CdA.
Bianchi, Ridley, Montague, GT, Garmin and All things Apple :)
RK wrote:And that is Wikipedia - I can write my own definition.
User avatar
sogood
 
Posts: 16968
Joined: Thu Aug 31, 2006 7:31 am
Location: Sydney AU

Re: Think you're aero?

Postby Ant. » Mon May 04, 2009 6:43 pm

I know that, but for Levi to be that low, he must have some fairly short humerus's or something. If my saddle-bar drop distance was similarly like that, I'd look like an age-grouper triathlete... :shock:

I've noticed the pro and presumed better TT positions (Levi, Zabriskie, etc) are fairly crouched up - knees close to scraping elbows. Maybe this guy (RIP) could've done with shorter extensions (among other things like number, wristbands, shoe covers etc)
Cervélo R3
Cervélo P3C
BT Blade
Ant.
 
Posts: 758
Joined: Sun Oct 26, 2008 8:34 am
Location: Perth

Re: Think you're aero?

Postby Andrew69 » Fri May 08, 2009 8:45 pm

sogood wrote:I understand that width matters when it comes to CdA.

I would be interested for Alex to chime in here, but Im pretty sure that some of the guys that are looking for a super narrow elbow position are wasting their time as their hip width is their limiting factor. John Cobb has stated previously that having elbows in any narrower than hip width is pointless for most people and can be counter productive (handing more than aero)
2007 Orbea Aspin
2008 Cervelo P3C
User avatar
Andrew69
 
Posts: 300
Joined: Thu Jun 07, 2007 6:36 pm

Re: Think you're aero?

Postby Alex Simmons/RST » Fri May 08, 2009 10:06 pm

sogood wrote:I understand that width matters when it comes to CdA.

Frontal area matters but so does coefficient of drag.

As for elbows (and hands) wide v narrow, really it is an individual thing and there is no one rule that works for all.
Same with arms pointing up (slightly) or horizontal.
Same when comparing aero helmets (for some there can be a sizeable difference, for others it matters less) - depends on relative head position.

Yaw angles can also change things somewhat.
User avatar
Alex Simmons/RST
Expert
 
Posts: 3443
Joined: Fri May 02, 2008 3:51 pm

Re: Think you're aero?

Postby Kalgrm » Fri May 08, 2009 10:45 pm

Yeah, I think I'm aero.

But I ride a 'bent. ;)

Cheers,
Graeme
Think outside the double triangle.
---------------------------------------
My web site: www.scenebyhird.com
---------------------------------------
The Bicycle Transportation Alliance
User avatar
Kalgrm
Super Mod
Super Mod
 
Posts: 9236
Joined: Fri May 25, 2007 5:21 pm
Location: Spearwood, 9km SE of Fremantle, WA

Re: Think you're aero?

Postby moosterbounce » Fri May 08, 2009 11:46 pm

Ant. wrote: Maybe this guy (RIP) could've done with shorter extensions (among other things like number, wristbands, shoe covers etc)


You need to learn to let go... :(

Nice kit :D
moosterbounce
Moderator
Moderator
 
Posts: 2478
Joined: Tue May 17, 2011 8:06 pm
Location: Rivervale WA


Return to Time Trial

Who is online

Users browsing this forum: No registered users



Popular Bike Shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Ebay Ebay AU

“Bicycles BNA Twitter
“Bicycles BNA Facebook
“Google+ BNA Google+
“Bicycles BNA Newsletter

> FREE BNA Stickers
> BNA Cycling Kit