Home made aero helmet

Looking good.

They laughed at Obree... Looks who's laughing now.

i hope you didn't use the daily mail else you might find the right wing is more prominent than the left.

At this point I was pretty happy with the overall shape of the thing. But it still needed some work to get the surface even and smooth.

I experimented with applying strips of differing thickness, more glue, less glue, lots of small pieces, bigger pieces.

Getting rid of those ripples was tricky.

Looking at these pictures again now I remember how much glue I got all over my fingers every night for several nights and that satisfying feeling of peeling and rubbing from one's fingers dried on PVA.

I used to love picking PVA out of my hair when I used it for my mohawk.

I experimented with applying strips of differing thickness, more glue, less glue, lots of small pieces, bigger pieces.

Please spare us of your technical mumbo jumbo

man, let me second that.

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I have just finished (in conjunction with a jnr-ru) a papier mache viking ship. The hull looked very similar to this.

technical details
I find wallpaper paste to be a better fixative.

/csb

Getting rid of those ripples was tricky.

Mightn't those ripples actually provide some kind of aero effect? See the LG vortice:

I am enjoying this thread. Most excellent

I am indescribably excited by this thread on three or four totally separate levels.

At the time of this there were no terms in my head like laminar flow, turbulent flow or separation. I was just doing what I thought looked and felt best.
Having since read a little about aerodynamics, I would say that I was aiming for a low Reynolds number and maximum laminar flow.

I will consider intentional turbulent flow in any future projects.

I wasn't really taking it that seriously.
But I knew I wanted those ripples gone. Smooth, smooth, smooth it must be smooth and flowing was what I had in my head. I knew, intuitively perhaps, that those ripples would 'trip up' the air.

It's an interesting area - I've done just enough reading about aerodynamics to be able to get LOADS of things wrong about it.

Anyway- the thing that I initially found counter intuitive was the smooth flow vs turbulent flow issue- smooth flow being what I thought should be better, as it sounded faster.

I've been covering my car in small dents ever since I read about it, in an effort to decrease drag.

golf balls are dimpled innit - and they must be designed to cut through the air as much as possible

^^
http://static1.fjcdn.com/thumbnails/comments/Those+are+speed+holes+they+make+the+car+go+faster+_194150a9337e65ca65c7801be58bd632.jpg

I've been covering my car in small dents ever since I read about it, in an effort to decrease drag.

Why do you think the French have hammered mudguard in the first place?

They think of everything (and handlebar bag make good flaring).

Smooth flow is best, but turbulent flow has better adhesion. Adhesion is good. Separation means low pressure where you don't want it. I think I understood this somehow and that's what the tail is so long and pointy; it decreases the need for good adhesion. I think.

That does not agree with what I took from my reading, but I'll leave it there as I am shockingly ignorant of these things.

Do you think you can put crochet on the helmet to give you that dimple advantage?

crochet on the helmet

Ed, I am disappoint. You had a perfect opportunity to post an illustration, and you failed.

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