Pslide - the sketch you did looks quite cool though I can see where the Nova body kit comments come from. Not sure I'd want anything that's out of MAX Power stuck on my face.
I have to say, the D2 I have does give good ventilation but I do notice it on climbs, and I've noticed it more recently as my fitness slips into non existence. You're right about were MTB is at the moment, I'm not sure any major brake throughs will happen for a while though.
Look at gearboxes. Surely the perfect thing for all MTB applications, yet still very few manufacturers are taking up the challenge. Instead focusing on different ways of bending and shaping tubes.
If you can make a helmet proven to make a difference then I think you'd find a few world riders knocking on your door, but for joe public, the type of R&D you'd have to put in would no doubt make the unit cost out of their league. Don't give up on it, but don't focus on it, if you get me. I don't think MTB is ready for it yet.
its ok
i'm suprised troy lee hasnt snapped u up already
possibly a little bit of work could go into making that chin & mouth guard stopping the dirt and s**t going into ur mouth
Trouble is (directed at Pslide) you'd then end up with a compromise again, no better than what is already out there. As soon as you block it up to prevent cack getting in, bang goes your air flow.
Erm, did I say mountain bike company? I meant bike company...

I arrived at the 5% number by comparing my red blood cell count from blood samples directly after doing runs with both full face and dirt jump helmet on.

Of course it's just a number out of the air. Someone else with far more medical knowledge than me already posted a biomedical response.
Man, you guys just love ripping apart people's ideas. I must admit, I've learned a lot about the SDH community from this thread...
One word of advice - don't go on dragons den then! It'll make this lot seem like a bunch of kittens!
Were we simply supposed to pat you on the back and congratulate you on an amazing fix to a non-existant problem?
I like how if you don't have the problem, then it must be non-existent...

It is interesting to me though that there are only a few people who have responded that have experienced the same thing I have. Anyway, it doesn't have to be a big problem to be improved. Otherwise we'd all still be riding single pivot bikes...
'Ere, isn't your bike a linkage actuated single pivot?! Don't slag em off, can't stand the way linkage bikes feel under you and I've never felt the single pivot of my Gemini or Judge hold me back.