Talbot Frameworks PRJCT SLVLSS

Since everyones throwing about aerodynamic theories... Surely at bicycle speeds a thinner leading edge is more important (as tester has said multiple times). In my head I think about a simple practical demo... grab a small diameter wood dowel (4mm?) say, 60cm in length and swing it through the air - you'll notice definite drag and you'll hear a swooshing noise - now grab an equivalent wooden strip - like a wooden ruler with a blunt edge and swing that through the air, thin edge leading and you will feel less drag - even with no shaping to the edge. It's just frontal area.

Paint wise - paint in any colour, flouro as a preference then chuck the thing in a high speed wind tunnel and put abrasive sand in the airstream so you get sandblasted polished sections where the airflow hits first. It'll seem like you've been riding accross the Bonneville salt flats at 500mph.

In my head I think about a simple practical demo... grab a small diameter wood dowel (4mm?) say, 60cm in length and swing it through the air - you'll notice definite drag and you'll hear a swooshing noise - now grab an equivalent wooden strip - like a wooden ruler with a blunt edge and swing that through the air, thin edge leading and you will feel less drag - even with no shaping to the edge. It's just frontal area.

All that's showing is that if you reduce the frontal area you reduce drag, and I don't think anyone is suggesting otherwise. Making a Thing have a pointy front does not reduce the Thing's frontal area. It has no effect on the frontal area if the size of the Thing (such as a headtube) to which you're giving a pointy front stays the same.

Such aero, many metres....

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Is that the down tube for my next bike?

head tube....

Very slippery, vastly expensive...

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so TL:DR...you're making a 14r with gears?

Essentially, yes.

Just more aero, less stiff, more colours, and more expensive.

It's going to fly off the shelves.

Such aero, many metres....

Such aero, few millimetres:

May be of interest if you decide to hand build a two-level cockpit rather than using an OTP aerobar.

@mdcc_tester that is the idea. What is the above drawing from?

His 3T Ventus risers

^This. Still waiting for the machinist to quote for them, but the gist is at http://grafixbyjorj.co.uk/#ventus. Would work with the 3T extension clamps and elbow cups, which you can buy as separate items

I have a pretty sh0rt attention span jorj, and also an implausable timeline, so these may have to wait until after bespoked...

Yeah, I had a feeling you might be cutting it fine to get the frame done, without getting involved in custom bars.

That lock ring is an excellent idea

this
/thread derail

edit: ahhh this thread has moar infos

Stupid head tube doesn't work with my not stupid anvil jig, so making of tooling was required. Which is fine, as I have loads of time...

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.

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Does it barspin (yet)?

@mdcc_tester got any of those slam dat stem jobs left?

Yes, 45mm 46mm 47mm and 48mm ODs are all in stock.

hmmm, going to be too big I fear.

Stupid tubes mean hand mitring....

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Starting to look like a bike.

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Looking pretty aeroz...

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