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Planning on jumping off a 1000ft A. Ideal delay off this object is from 4 - 6 sec. Im planning a 5 sec delay, but iv only got 3 pcs (all bought brand new btw).
Base book says for a 5 - 7 sec delay that 34 - 38" pcs are ideal. But it says factors depend on canopy size and weight. I assume from this chart that for a 5 sec delay the 38" is ideal and the 34" is ideal for 7 sec delay.
Im wondering if i can use my 36 " vented pc for the 5 sec delay (hastle free) or should i go with the 6 sec delay? Concerned with the snatch force.
Iv only got a 46", 42"vented and a 36" vented pc. So the 36" will be used unless i go with a shorter delay (Not planning on it tho). I jump a seven 260ft and my wing loading (with all my gear) is .69 .

Your not by chance an engineer are you? BASE is never as exact as it may sound in the textbooks. Put on a 36-42 inch PC and go jump. Also may want to fix your thread title, as I would not use any of those PC's for a 100 foot jump

Woops, was wondering what you meant by 100ft

ye base is not as exact as that but i tought id post it anyway. Better to ask than find out im not as bounceproof as i think

the 42" isnt a problem with snatch force. might be helpful if u want to get off the object lower for whatever reason. then your not sweating if u have the 36" on.. either will do really.

i use a 36 vented with outside pvc handle from 1600' with an 8 sec delay.
my buddy used a 42 vented no handle on the same obj with the same delay. no issues

if you have never jumped that particular object and have low experience on 1K jumps, I would recommend going with a 42, just cause you are much more likely to panic pull earlier.

If you do put a 36" on, you should still survive. Hopefully... (let this haunt you !)

To funny, I just had a 10 second conversation about this yesterday. There are several threads on here somewhere about this if you search for them.

Using your fall rate of 9.80665 m/s2 (approx. 32.174 ft/s2) at 5 seconds you're moving just over 100 mph and starting to feel your track. I think if you search around you can find a generic snatch force chart for PC's around here somewhere.

Edit: And btw, your wing loading has nothing to do with how fast your PC drags your canopy out of the container.

For what its worth, I use a 38 zp for a 700 ft slider up jump with a 260 seven on a very regular basis. Use whatever your most comfortable with, itll work. Just dont use one of those pilot chutes with a hat on it, I freaking hate those things.

I forget but at the go fast games in 07/08 wan't a 42 required? No more then a 5 second delay and it's a 1000'object....

that said I *may* have taken that same pack job / pc combo on a heli bandit load during the 07 event, which far exceeded a 5 second delay. The opening was 'positive'

_justin

Go with 42"

yep

with a 260' canopy, a 42" PC is your best friend. you can literally jump anything with it. you should have two.

42" is also my favorite pc to go stowed with from 300 to 1500. Maybe because mine has a nifty skull and crossbones and matches my rig better. But I wouldn't have any problem using my 38 from 700 to terminal. 36 is cool too but I own a 38 and don't see much of a point in buying anything smaller if its not gonna make a difference. Below 300 I put on a 46 for everything down to 200, and then in that ballpark I static line so it doesn't matter anymore what I've got on as long as there's something there IMO.

http://www.blincmagazine.com/forum/wiki/Delay_Chart

I use a 38 for such jumps. I've done it hundreds of times without issue.

Why you say 42?

multiple opinions obviously exist. none matter, other than yours. gear fear sucks.

the best way to avoid gear fear is to build from your own experiences.

Thing is, if you use a 42", what's the worst that can happen? Nothing besides a hard openeing. I've jumped a 42 at full terminal once, no problem
Main point here is that a big PC ain't a small PC

Definitely the 42" given the object height,
likely exit point, his three pilot chutes, his
experience level, and my own experiences.

He said:
3 PC's: 46", a 42" vented and a 36" vented
Planning on jumping off a 1000ft A
Book, Chart, Delay, blah blah
seven 260ft wing loaded .69

Well in my opinion, those big ass PC's
(pretty much anything from 43" to 52")
are not meant to be stowed, they are
for hand held jumps, usually done low.

That leaves the 42" and the 36".
Hmmm, well both are vented and
good for being stowed but....we have
180 pounds of newbie doing a jump
where he is consulting 3 sources to
decide (which is good, and fun, the
time spent planning a good jump is
like foreplay so I am not knocking
that) and is wrestling between the
delay being 6 or 7 seconds long.

If it was Miles, yeah, we'd all say
use the 36" and take a F A T 7.

But for this guy, and myself, I'd
recommend using the 42" and
try to take an honest 7 seconds.

If him or I do accidentally take a
shorter delay than intended then
the extra PC might help to get
the wing open before it can turn.

As said earlier, the only downside
is a possibly stiff opening, plus I
like that Blitzkreig said with a 260
you can jump anything with a 42".

cuz' this persons profile says they have 4 jumps off of 2 different objects. 1,000' isn't that tall to a new jumper, and by chance if they pitch early it's made a little better by a 42", IMO. this discussion could go a 100 different ways depending on experience level, but my answer is tailored to the "4 BASE jumps" person asking the question.

Thanks for all the replies. Im going to take the 42" with slider up configuriation for a 5 sec delay. This particular object is def going to be the less riskiest as iv jumped a 300ft A (hand held) three times and a 600ft cliff (stowed). All far from ideal with regards to progression unfort but Im working with whats around my country which are all low def going to another country soon to gain more experience tho.

exact-o-mundo.

also, FWIW... i would never "recommend" taking more than a 5 sec delay from 1000ft to a newbie. there's a lot to learn, and 2 seconds at that altitude won't be any benefit to it, except possibly increasing the chances of learning time in the ER.

don't put any frowny face emoticons next to "low", too many freaks that just LOOOOOOVE the low around these parts!! have fun be safe bro!

Just a question, so be gentile.
You say you wouldn't recommend more than a 5 off 1000ft for a noob. But that puts him still close to the wall and slider up... If you're going to take a 5 and be close why not recommend he take a 3 or 4 and be slider down and deep brakes? In my opinion, if he's not going to be going that fast, its better to be slider off for heading performance and quick riser input, right? So take a 7 and be safe...ish and rad, or take a 4 and be safe...ish, but 5, as a newer jumper, on a solid object, slider up, shallow brakes...you think thats the best advice?

well first, he's talking about a 1000ft antenna.

i wouldn't recommend a 1000ft E to a newbie at all.

but also, 5 seconds slider up yields pretty good heading performance in my experience, and is much easier to correct an off heading on, compared to a 3 second slider off IMO.

Oh, my bad. I wasn't really paying much attention. Just trollin'.

Nice

I'm in experience your attempted 5sec delay will be four or less if it's your first time on this sort of jump which I suspect considering the question. I would go with the 42 you have. The 36 will be fine once you get the correct delay dialed in.

If you are going to jump this a lot in the future get a 38 pc. I have 50 plus from 900 ft 5-6 secs with a 36 pc vented the same I would use for terminal. It works fine but a 38 would be perfect.

Here's my rule of thumb:

0-2s handheld - 46"
1-5s stowed - 42"
5-8s 38"
8+ 36"

I never jump anything with a PC smaller than a 36"

There's some overlap in what is acceptable; if you think you're going to do a 5s delay or possibly slightly less go for the 42; if it's 5-6s, go for the 38.

I jump a Troll 245/265 MDV; all my PCs are vented (apart from the 46, obviously); my wing loading is about the same as yours.

 I agree with most of what you said . Except the part about never jumping anything smaller than a 36. If you make multiple 15 + second jumps , multiple days in a row, you may find yourself wanting a 32". If you've abused your body pretty good, and heading performance is not a big deal, you may find yourself with both a 32" pc and a full sail slider.
I think each pc has a perfect intended delay time associated with it. Having said that, yes a bit larger , and more conservative is a good way to go , but will defiantly wear on both your body and your gear if you constantly take longer delays than what you've got your gear appropriately set up for. Especially with all of the new lightweight canopy configurations out there.
When I was younger, and hornier than hell for the sub-terminal world, I would strap a camera on for every jump I made.....my neck and back suffered from multiple hard openings in a row. I asses jumps differently now. I look at the toll on my body vs. reward, and factor in the risk factor as well,
Just my .02$, but I've made my share of slider up and slider down jumps. I have MRI's to prove it. When you cross the finish line in life , if you're so battered that you have to be wheel-chaired across it, and you don't even enjoy it anymore......are you really winning
I would suggest asking the locals for any crucial piece of the puzzle that you might be over looking . Jumping one size larger pc than the chart recommends , until you feel comfortable , then jumping the correct PC/slider combination, as long as you feel 100% solid on the object.
Just my .02$...... but what do I know..... I play with monopoly money :)>.

P.s. Not aimed at you Pendagon... just to the subject line in general. Having said that..... there's also the human error..... I have a friend who jumped a slider up rig off a antenna from a slider down altitude and ended up injuring himself permanently . I also have a friend who jumped a slider down rig off .5 dome in Yosemite, snapped a mini riser in half, and wouldn't be here with us alive today. if it hadn't been for the fact that the Search and Rescue Helicopter was in the area, and happened to see him waving his bright sleeping bag around to try and get their attention.
Life is a funny thing, I'll take all the breaks I can get. Nobody's perfect all the time....leaving yourself an out......a few extra feet of altitude......even a just stacking the deck as much as you can in your favor........ well it can't hurt.

Anyhow ... for real............ Buenas Noches,

It's a personal choice and I think it also depends a lot on the canopies you use but I never personally jump smaller PC than 36" and very good portion of my jumps are subterminal to terminal E's. With my 265 Trolls I'm using at the moment 38's in any SU jump (my longest tracking delay to date is 50s so that's pretty well in terminal :) ). Jumping anything smaller yields way too slow and snivelly openings for my taste. With my 265 Trango I'm using 36 for all jumps, both on tracking and in WS. I also know several other experienced jumpers who have changed in to using 38's with new powerful tracking gear since the "terminal" fall rate with those is actually closer to fall rates with some smaller wingsuits.

I agree that if you are jumping slick (jeans and t-shirt) multiple days off a huge terminal wall (like Kjerag), you might benefit from 32". But any other "modern" configuration I see absolutely no need for anything smaller than 36".

Thanks for all the advice. Fitted the 42 " pc to my rig on the day. Woke up and it was too windy Just waiting for the wind to die down, hopefully next week

I too have jumped a 42 at full terminal before. There is no advantage however to jumping a really big pilot chute on longer delays. In fact, there have been some incidences where a large (like 46 or 48 inch) pilot chutes have been used on delays inappropriate for their size at Bridge Day. Some of the openings resulted in severe center cell strip and in some cases, slider up line overs.

It's a special 1000' object.

The canyon narrows as you go lower and the wall opposite the parking lot gets close enough that off-heading openings have resulted in wall strikes followed by high-angle rescues. That makes a higher opening altitude than for other 1000' objects prudent.

4 seconds and a 42 were my choice.