goose491 0 #26 December 3, 2003 Quote In reality, we're only hoping to slow down the helmet enough so that a: it lands with the expensive parts pointing up, and b: it doesn't kill someone. We could probably get by with a 15 inch pilot chute, rather then a 30 inch. Or less... I wonder how small you would need? Good point! With a sidemounted camera... and a helmet meant to protect from impact, your camera could potentially be saved if only decelerated a small amout if the helmet hits first. My Karma ran over my Dogma!!! Quote Share this post Link to post Share on other sites
goose491 0 #27 December 3, 2003 Quote In reality, we're only hoping to slow down the helmet enough so that a: it lands with the expensive parts pointing up, and b: it doesn't kill someone. We could probably get by with a 15 inch pilot chute, rather then a 30 inch. Or less... I wonder how small you would need? Well, a pilot chute 19 inches in diameter would give you a 1:1 loading on your 2lb setup. Could probably affor a little smaller. Now, how much force would that apply? My Karma ran over my Dogma!!! Quote Share this post Link to post Share on other sites
kallend 2,027 #28 December 3, 2003 QuoteQuotei think ther eis a reson why you shouldnt take loose, heavy, items skydiving. Whut....? We DO take heavey items skydiving, and we hope we don't have to discard them, but that is a risk, one that we all accept. I'd much rather my cuttaway helmet impact a building or person under some kind of canopy. That said, it doesn't have to be a full pilot chute. It seems to me that a helmet and camera probably weighs in around 2 pounds, and there is roughly 5 square feet in a 32 inch pilot chute, which gives it a wingloading of .4 - we could get by with something much smaller then a standard pilot chute. In reality, we're only hoping to slow down the helmet enough so that a: it lands with the expensive parts pointing up, and b: it doesn't kill someone. We could probably get by with a 15 inch pilot chute, rather then a 30 inch. Or less... I wonder how small you would need? _Am There are some nice, small parachutes designed for high speed openings used by the high power (model)rocket community. Of course, since 9/11 the government has been doing its best to put an end to that hobby.... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
DJL 235 #29 December 3, 2003 I don't own a camera helmet but was thinking about this just because that's what I do. What I thought would work is to construct the padding of the helmet so that the PC is inside a sleeve within the helmet padding. When you cut away, you would also extract the sleeve from the helmet and as the helmet fell the PC would come out. No springs, and nothing complicated. The only way is would come out is if the helmet were off because you cut it away. I call this the Doug-Hook-Camera-Helmet-RSL. Edit: Speaking of modified helmet cutaways. Ask psw097 to post pics of his cutaway. Pretty nifty."I encourage all awesome dangerous behavior." - Jeffro Fincher Quote Share this post Link to post Share on other sites
