Question about Pilot Chutes

[kai2k1 0]

Is there such a thing as a P/C being too big?

I jumped my rig for the first times yesterday and the opening were kind of brisk. Nothing too hard, but quicker than I had anticipated.

I have a very large PC and was wondering if having a bigger PC would cause my main to open faster.

Any Opinions?

There's no truer sense of flying than sky diving," Scott Cowan

[headoverheels 334]

What size is your pilot chute, and what size is your canopy? What type of canopy?

[kai2k1 0]

I just measured the PC, it measures 30" across,

Im jumping a PD 190, F111 Nine cell.

Thanks for the help.

There's no truer sense of flying than sky diving," Scott Cowan

[AggieDave 6]

The PC's size is dependent on the container manufactures specifications. Some canopy manufactures want you to use a PC smaller then the containr's manufacutre's recommendations; however, the PC is apart of the container system and is designed to exhibit enough force to extract the bag and canopy during opeing. If you have a canopy is opening bad the openings are being blamed on the PC sized, more then likely it is due to a faulty canopy design and a "band-aid" fix of a smaller PC to fix the problems.

More then a few folks have bought a smaller PC then recommended by the container manufacture to fix an opening problem only to find PC hesitation and PCs in tow. Not a very good fix IMHO.

--"When I die, may I be surrounded by scattered chrome and burning gasoline."

[kai2k1 0]

I have a Vector 2 container and up until yesterday I had jumped nothing but the old Student Manta 288's

On my first jump, I dont think i was ready to see my canopy open that fast, which got me to thinking since I looked at the PC and thought that is was kind of big. Which led me to think that I may have a PC that was too big.

There's no truer sense of flying than sky diving," Scott Cowan

[towerrat 0]

do a search. there is some interesting info about pilot chutes on these forums.

Play stupid games, win stupid prizes!

[mjosparky 4]

Quote

I have a Vector 2 container and up until yesterday I had jumped nothing but the old Student Manta 288's

On my first jump, I dont think i was ready to see my canopy open that fast, which got me to thinking since I looked at the PC and thought that is was kind of big. Which led me to think that I may have a PC that was too big.

The PC has nothing to do with how fast you canopy opens. If you PC is to big it will increase the snatch force you feel but its job is done as the the canopy leaves the bag.

If yesterday was the first time you jump the 190, I would say what you are feeling is the difference between that and a 288 Manta. Opening speed has a lot to do with "fill time" and it takes longer to fill 288 then it does 190.
Sparky

My idea of a fair fight is clubbing baby seals

[hookitt 1]

Sort of true... using that equation, my 97 would open really fast and my 78 would open faster.

How many jumps are on the 190?
Who packed it? (you or a packer)

Packing technique will slow a pd 190 down quite well. Properly rollling the nose, and ensuring the slider is up against the stops after you put it in the d-bag and before you close the d-bag.

It doesn't matter whether you side pack or pro-pack but good old school packing techniques will tame a brisk opening.

My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

[talon2 0]

Standard PC,Bungy or Kill line?
Mike

[darkwing 5]

the quick answer is that your pc does not seem to be sized out of line for your main.

-- Jeff
My Skydiving History

[mjosparky 4]

Quote

Sort of true... using that equation, my 97 would open really fast and my 78 would open faster.

I should have included, all thing being equal. Your 97 and 78 have design features to slow down fill time.
Both the Manta and PD- 190 are square canopies with open noses.
Sparky

My idea of a fair fight is clubbing baby seals

[hookitt 1]

That is true.

When I was a packer, we packed 288's and lots of other standard squares. (rectangles actually.. why are they called square? don't ponder that )

The common denominator was that especially when they were new, both would slam the shit out of you if nothing was done to slow the parachutes opening.

Rolling the nose, 4 and 4 to the middle, making sure the bottom of the nose was closed up. You can do that by allowing the a lines to turn in. When you get to the center rib, stop rolling.

Place the slider where it belongs. During the S fold, be sure it's still up against the stops, and double check it after it is in the bag.

That's pretty much it.

My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

[mjosparky 4]

Quote

When I was a packer, we packed 288's and lots of other standard squares. (rectangles actually.. why are they called square? don't ponder that )

Some of the first ones out were just about square. Aspect ratio of zip shit. Makes the flair suck. But they were better than round.

I jump a big seven cell, Sharpchuter, and controlling the nose is a big deal with the cells being so deep.
Sparky

PS: as a rigger, aren't you still a packer?

My idea of a fair fight is clubbing baby seals

[kai2k1 0]

Thanks Sparky and the rest of you all. I thought that might be the case, but I've only jumped my 190 3 times. I understand what you mean about fill time now. I love flying the 190 much much more than the 288.

There's no truer sense of flying than sky diving," Scott Cowan

[hookitt 1]

Quote

PS: as a rigger, aren't you still a packer?

Well ... yeah!

My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto