So the basic objectives were:
1) to keep the sun entirely off your neck and ears.
2) Also to allow maximum air ventilation and through-put while moving or not.
3) Panels must not rub on ears, neck, or shoulders of rider, even underway, even while turning head underway.
4) Must not create any whistling effect even on fast decents, or any other weird drag.
5) All components must be detach easily in a crash.

What was accomplished (Yes, it works!):
1) Sun totally shielded from neck and ears (assuming you wear a shirt with a bit of collar--I wear white soccer jerseys). You still need sunscreen on your cheeks, chin, and front of neck.
2) Air flows through panels just the same as "normal" helmet, if you are underway. If you are stopped, air flows through about the same, unless you are sidways to the wind, but it still vents. Everything is spacered away from everything else.
3) Panels on side and rear do not touch rider's neck, ears or shoulders while in static mode. Sometimes panels touch shoulders slightly, or base of the neck, when head is twisted far over (as in looking behind you), and the friction on the bottom edges causes an unwelcome rasping sound. However, it doesn't touch my ears even when twisting.
4) No whistling, no weird drag, no oscillating, even on fast descents (45mpg), even with windshear, even while turning head.
5) Detachable in a crash!? Who knows!! Well, seirously, I did my best to make it that way. I used shortened, blunted dry-wall anchors to attach the panels to the foam. All other parts are blunt and flexible.

So this was first draft. If I tweak it or build another, I'll use that gold-covered mylar material that's used for fire survival blankets to create the reflective surfaces on the side-panels. Done right, it should look good--or at least not more outlandish than the "average" one-or-two function bike helmet.

Now for helmet manufacturers to get off their akoles and build something better than one-trick egg-crates!

I understand the desire to protect yourself from the sun, but what do you need a helmet for.

OZ aside, how many really desert states like Cali NM, Arizona, Florida, have helmet laws. Just wondering, I mean up here where it is often too cold they still require helmet use though the makers haven't made too many that integrate well with a parka.

I think most states leave it up to cities and counties whether to make foamlids mandatory.

There're plenty of western states where it's "only" super hot a few months at a time. Can take just a couple of hours, let alone months, to get heat stroke, hence the need to adapt, the more ways the better. Like those little rabbits in the Mojave, radiating heat in the shade from their enormous ears.

I was thinking of starting a list of current helmets that integrate or accessorize with anything, above and beyond a visor, without a lot of modification. It'd be a short list. Shorter still helmets with >2 features.

this helmet features an integral face mask and maybe some evil touring powers.

https://upload.wikimedia.org/wikipedi...5c/DVader.jpeg

Honestly, seeker333, first you advocate an any-rag-n-bucket-will-do philosophy, now you present us with . . . . Darth Vader's helmet. Tut-tut.

Hey if your design works for you, go with it Drakonchik!