I guess I'd go 6 tapes, small mesh ring vent for stability while still having zp at the apex. I might even name it something like "nuclear" because it would kind of look like a toxic waste symbol ;)
I'd go for a 46 in size, maybe 48. Seems to be about the size where unless you're able to sprint and pre-inflate, you start to reach the point of diminishing returns for pc inflation time/ distance to enough snatch force to do what you want.
Zp non vented might be a tad faster, but off of low solid objects I'd start worrying about heading performance.
I'm the attached picture, the seams on the ring vent are on block. Most pilot chutes are a single piece of material, so it's hard to say it's really built on block of bias as there are likely more than 4 tapes. I'm not sure that on that small of a piece of material with as many tapes as are present that there is a huge amount of difference in each panel (gore) like on a big round. Someone smarter than me probably has a better answer about that though.
(This post was edited by hjumper33 on Jul 12, 2017, 7:04 PM)
Solid Object versus Tail Wind might affect one's decision to use a vent, so far I have seen four different types of vents . . .
Options for Type of Material changes when you add the caveat of ONLY ONE JUMP . . .
As for Size, I could do a dissertation on the topic, but the four variables I would want to know before I answered is the jumper's exit weight, canopy details, field elevation, and yes even the expected temperature.
As in the perfect PC for Jesse Hall to freefall a 150 foot antenna in Tallahassee in Winter is different than the ideal PC for Tree to freefall a low cliff in Moab in Summer...
It's weird, almost everything in base has a lot of brand loyalty, but lots of people jumping non asylum gear still love toxics. I think they're fantastic. With your gear, free falling 200 ft and even down to 180 shouldn't be an issue with most standard apex vented pilot chutes. I used a standard 46 for most of my low freefalls.
Good to know and thanks for the advice. I have a 42" toxic and love it. so say we change the scenario slightly and now I'm stepping off with an underhand toss PC S folded all the way. would I then benefit from a 48" with my weight and gear or do you think I would still be better off with a 46"?
Also have people pretty much decided that 52" is not beneficial anymore? after reading DW ultra low freefall writeup many times it seems like it may really depend on your setup whether it will help or hurt your opening height.
Jul 13, 2017, 6:52 AM
Post #15 of 56
Re: [wasatchrider] Crowd Sourcing R & D ??
[In reply to]
Its just a scenario but thanks for your input. also are you suggesting people don't jump freestanding antennas in low to no wind conditions? cause I imagine it happens quite frequently...
Also just to clarify once again I have no specific jump in mind. I'm just looking for positive suggestions as to what could be done to build the ultimate low freefall PC. if you have ideas crazy, far-fetched, or whatever I would like to hear them.
ok sorry 65F is 65 degrees Fahrenheit... it has nothing to do with the height of the object lol I was responding to GreenMachine and he asked for specifics on the scenario regarding Jumper, gear, ASL, Temperature. I thought 65F was pretty clear. As far as I believe to FF 65 feet you wouldn't need a PC or any other gear for that matter because it wouldn't help...
(This post was edited by nbpmich87 on Jul 13, 2017, 7:08 AM)
If you're only using it once, you could just use a rocket deployment system, maybe with some kind of ballistic spreader for the canopy.
I think the rocket deployment system that Peter Gambs had cost something around $1000 per deployment, but I saw video of him getting full inflation from things that were probably low enough to survive (landing on solid ground) without a parachute.