First let me say, I don't want to sound too ruff or stern, on you.
Give 'ead a shake mate!
What are you going to 'make' a helmet for?
Go out and buy one!
You talkin' about protectin' the ol' brain box, the noggin', the day ol' jelly doughnut!
This piece of equipment is not something to be messing around with, in terms of safety.
What ever you make will be unproven. And the only way you will prove it, is if you walk away, or not.
I look ridiculous when I kite. I've got a big old orange life-jacket--It's the vest, not the really old head through the keyhole type!--(people laugh until they have a problem and need to tread water, control their board and fix lines or just sit there and wait for the wind to come up. I just relax floating.) and I wear a bicycle helmet!
Super light, cheap and does the trick!
I've taken some real crashes and was in shallow water and the impact really stunned me. I blew of the plastic on the bike helmet somehow somewhere, too.
I've even tried a hockey helmet and it works just fine, too.
I've seen guys with snowboard helmets and kayak helmets.
Do yourself a favour and just go buy one.
How about this: you are hooked on an unproven kite! Gosh. It's unproven! Not certified!
You can only walk away if you did not break a neck. And of that my friend, helmet will not protect you...I would know, I'm a paragliding pilot.
Soooo many ppl I knew never walked away. It' a false security thinking a helmet will save you. And than, being a 100% paraplegic below a neck is a bit less bad than a 100% brain injured.
Think Christopher Reeve.
I would rather have a titanium helmet than a cycling one. Titanium would be really cool hey?!
Btw titanium is a material of choice for cranioplasty.
I've asked here coz we build stuff. We are not an average street joe's who just buy, buy and buy more stuff...