Testing TT in the wind tunnel

A2 Wind Tunnel Tests TT

Category:

Sports

Tags:

• TT
• Nathan
• O'Neill
• Aero
• Aerodynamic
• speed
• position
• Time
• Trial
• windtunnel
• wind
• tunnel
• fast
• testing
• test

[ultramagnusreturns]

seat too high, you're at full extension at bottom of pedal stroke, toes pointed down. It all adds up to loss of power in my book. As others have mentioned, you're looking straight down at front tire. Wind data will be inaccurate. Do the test in actual TT road race position to obtain accurate data. Otherwise, nice position, low and straight. cheeers

[A2WindTunnel]

@ultramagnusreturns @ultramagnusreturns We did exactly that and If you are interested in the test there is a link to the white paper that was written about the comparison and the protocol for wind tunnel testing vs. track testing. Replace () with a period. A2WT()com in our Bicycle section about half way down titled

A2 & Specialized Track Test at Lowe's Motor Speedway

Engineers perform on track testing to validate wind tunnel data

(White paper, Video, Article)

[Technopunkster]

although this is only good for TTs and short distance. alot of wind tunnel is theory because in practical use it doesnt apply.

Youd have to ride the same course. then the exact same effort, power output, cadence, weather conditions and wind resistance... all down to the nuts... to get a true comparison . and in reality that wil never happen. And in theory they say like maybe 2 minutes in a Half Ironman 56 mile course. So it helps yea but 98% of it is way overblown.

[A2WindTunnel]

@Technopunkster We did exactly that and If you are interested in the test there is a link to the white paper that was written about the comparison and the protocol for the testing. Replace () with a period. A2WT()com in our Bicycle section about half way down the page

[A2WindTunnel]

@A2WindTunnel The title in the section is as follows:

A2 & Specialized Track Test at Lowe's Motor Speedway

Engineers perform on track testing to validate wind tunnel data

(There is a video, article, & white papper written about the test)

[daFranch1se69]

I was wondering, would I look like a jerkoff, if I road a regular road bike with a t-shirt and shorts and with one of those TT helmets, is it dumb? Because that helmet will make you very aero even without the whole kit.

[A2WindTunnel]

I would say that what you would gain in a helmet you would kill with loose clothing and a non aero position. I have also seen a road helmet with a rider in an optimized aero position be as good as an aero helmet with the same riders head in a slightly higher position. So just because it is aero, doesnt necessarily mean it will be more aero on you.

[BleedingSunday]

You would. And be pretty pointless too. Training has alot more effect on non pro's.

[gabrielevans999]

@concordatthefort He's on rollers...

[christhesip]

FAGGOTT, ughh my back is really arched.

[flyingtigre1]

@ultramagnusreturns

unfortunately time trial bike are a little different in set up than road bikes.

if you look at his toes yea they are pointing down, but hardly enuff to achieve maximum power. What the rider forgot to do as he probley did not adjust himself once on that set up was to sit up farther on the nose of the saddle. This would have brought his toes in correct position. Im sure a minor error but worth taking note.

[paultrb72]

2 wheel drive ?:)):))=))

[Bregiannis]

@concordatthefort if you watch carefully when he starts to pedal, the back wheel moves first and after his leg :P

[concordatthefort]

how is his front wheel moving?

[saf768]

15 cyclist got hit by a car

[helicart]

@ultramagnusreturns He doesn't have full knee extension when on the aero bars, as his pelvis has tilted anteriorally which moves his acetabulum inferiorally; and he is resting more on the lower stem section so he can get his forearms down into the rests. The TT position usually has the tibial turberosity anterior to the pedal axle, so the saddle could come forward a little more to support the ischium as the pelvis tilts from the tuberosities onto the rami.

[headcheesekid]

The position is ok but not quite bang on. Given that this vid was posted a while ago, I'd imagine you've sorted it out. As your right leg comes to the top of the rev your head bobs forward - not good. S couple of spacers under the stem could solve that. Looks cool though ;)

I'd kill for that bike.

[opmike343]

@Xcelerate2

He doesn't know what he's talking about. Wind Tunnels have their uses, and the engineers and aerodynamicists that utilize them recognize their limitations. This whole "only works in theory" is nonsense, and oft repeated by people with no background in engineering. Theory doesn't mean "100% real world conditions always and forever." Theories are defined and have a scope that may or may not be a 100% practical application. A theory making an outlandish claim is a poor theory.