Bike porn

it's not the properties of the metal i was referring to, rather the dimensions of the tubes.

Steel tubes are of a small diameter. And when ovalised a very small frontal area.

I think the aero benefits of rider position, wheels etc,. are so much larger than those that could be taken away from the limited shape of steel tubes, that they could never be negated or cancelled out.

Not even by riding along with your mouth open?

Frontal area is only one part of the equation though

To offer a more aero position?

Should be setup as geared pursuit?

What would have been hitting the top tube if it was straight and met the head tube at the usual spot?

^What the fuck is that comparison?

They both have white frames? :o$

^^Not really with you on TT strike either? Mad bar spinz CMX frame?

Both are equally fast (thought can be argue that the latter is faster).

Frontal area is only one part of the equation though

Are they supposed to have the same area?

How can the streamlined half be less aero than the full one?

This is really, really nice

Are they supposed to have the same area?

How can the streamlined half be less aero than the full one?

Those don't have the same frontal area. There's a better diagram which shows a wire and a much larger aerofoil which both have the same drag, but I can't find it.

Are they supposed to have the same area?

Yes, in the sense that Cd is dimensionless, so the drag would be in the same proportions as the Cd if they all had the same frontal area.

How can the streamlined half be less aero than the full one?

Because the air has to move around it in a different way, which takes more energy. There is a particular issue with objects placed on static ground planes, which you'll notice if you ever walk past the Euston Tower; because the wind can't go under the object, it gets squished into the path going round it. It gets worse with taller structures because the wind can't effectively go over the object either; it is energetically preferred for the flow to accelerate round the sides of the building rather than climb over it, leading to higher wind speeds adjacent to tall buildings.

I meant the same area as in the cube having the same flat area of the circle and the triangle i.e., which I think is correct.

Thinking about it, the half streamlined would create its own Bernoulli effect and the turbulences associated with it, so it starts to make sense.

Because the air has to move around it in a different way, which takes more energy. There is a particular issue with objects placed on static ground planes, which you'll notice if you ever walk past the Euston Tower; because the wind can't go under the object, it gets squished into the path going round it. It gets worse with taller structures because the wind can't effectively go over the object either; it is energetically preferred for the flow to accelerate round the sides of the building rather than climb over it, leading to higher wind speeds adjacent to tall buildings.

I live nearby, that's what happens when you shape a building like a swastika. God gets angry!

Really starting to think Andy had a good point about this thread..

Happy Valentines... with every breath, i loving this

http://25.media.tumblr.com/tumblr_m6ic5aWEZg1qzimi6o1_1280.jpg

The skrtluvmobile needs a disc

Aww hells No, been off my aerowhel since the winds picked up and will only consider running it on dry sunny days without any crosswinds or where it makes the most sense the track..

sound of the rear disc novelty would grow old real quick

Aww hells No, been off my aerowhel since the winds picked up and will only consider running it on dry sunny days without any crosswinds or where it makes the most sense the track..

sound of the rear disc novelty would grow old real quick

... don't get me wrong, i wouldn't say No to iT

I think he meant a disc brake.
Edit: I obviously got too confused. Now I don't even know what bike you were talking about. haha

i meant the wheel

than i saw that i already Did

^^nope, I meant a disc wheel.

gaston's pellieux is stunning!!

Can't find more pellieux bikes anywhere...
Anyone seen a pellieux piste?

http://www.pignonfixe.com/showthread.php?tid=85210

Gaston, he's our man.

Worth it just for the beautiful photography.