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Mag Picture

 


adamqbishop  (D 31570)

Apr 12, 2012, 3:42 PM
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Mag Picture Can't Post

Flipping though the pages of my recent copy of Parachutist (April 2012 issue 630) I notice something odd in the picture on page 81. Let's see if a student can figure what the malfunction is.


skyjumpenfool  (Student)

Apr 12, 2012, 5:50 PM
Post #2 of 18 (2807 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

Not sure it's a malfunction...Blush


JohnRich  (D License)

Apr 12, 2012, 7:10 PM
Post #3 of 18 (2772 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

Might be a fish-eye lens that is distorting the image of the pilot chute at the edge of the lens and making it look a bit floppy...


adamqbishop  (D 31570)

Apr 12, 2012, 9:29 PM
Post #4 of 18 (2735 views)
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Re: [JohnRich] Mag Picture [In reply to] Can't Post

In reply to:
Might be making it look a bit floppy...

My Azz, that thing is colappsed Unsure


scottd818  (C 41314)

Apr 13, 2012, 9:14 AM
Post #5 of 18 (2622 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

im gonna go with uncocked pilot chute resulting in a pilot chute in tow.


JohnRich  (D License)

Apr 13, 2012, 10:52 AM
Post #6 of 18 (2587 views)
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Re: [scottd818] Mag Picture [In reply to] Can't Post

In reply to:
im gonna go with uncocked pilot chute resulting in a pilot chute in tow.

Not necessarily. The wind can re-cock the pilot chute by itself and give a normal deployment with just a few second delay. Or even collapsed, there might be enough drag to extract the bag and deploy the chute. Throw-out altitude determines how much time you have to wait to see if that will happen, starting with "none".

For those who don't get the magazine, I've attached the photo so you can see what we're talking about.

For the "fish eye lens" theory, look at the ground at the bottom and note the curvature at the horizon. That same curvature would then also occur at the top where the pilot chute is, causing it to look distorted.


(This post was edited by JohnRich on Apr 13, 2012, 10:55 AM)
Attachments: Pilot chute.jpg (64.9 KB)


dthames  (B 37674)

Apr 13, 2012, 11:00 AM
Post #7 of 18 (2575 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

I didn't look at anyone's response before I looked at the photo and I caught it. The pilot chute is not open, or not cocked.

Without knowing to look for a problem I would not have picked up on it.


skyjumpenfool  (Student)

Apr 13, 2012, 12:21 PM
Post #8 of 18 (2526 views)
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Re: [dthames] Mag Picture [In reply to] Can't Post

Although I would tend to agree with the uncocked theory...

As I said above, it may not be a problem/mal. If you've ever watched a pilot chute above a jumper, it dances around wildly in the burbal. A single snapshot of the pilot chute (still image) may have just captured the pilot chute as it was deflated, making it appear to be uncocked.

Cool


piisfish

Apr 13, 2012, 12:42 PM
Post #9 of 18 (2514 views)
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Re: [skyjumpenfool] Mag Picture [In reply to] Can't Post

Could also be a bungy collapsible pc which just deflated after the main tray opened. Seems the tray is open


theonlyski  (D License)

Apr 13, 2012, 2:42 PM
Post #10 of 18 (2459 views)
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Re: [skyjumpenfool] Mag Picture [In reply to] Can't Post

In reply to:
A single snapshot of the pilot chute (still image) may have just captured the pilot chute as it was deflated, making it appear to be uncocked.

This.


I've got over a dozen pics that makes it look like someone is having an uninflated drogue in tow, when it's just because I snapped them at the exact instant before they inflated. Here's one off the laptop.

ETA: another one, yes, I know he's rolling to his side.


(This post was edited by theonlyski on Apr 13, 2012, 2:47 PM)
Attachments: IMG_6579 (Large).JPG (93.2 KB)
  IMG_2463 (Large).JPG (85.0 KB)


SEREJumper  (D 29555)

Apr 13, 2012, 3:46 PM
Post #11 of 18 (2436 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

I've had 2 collapsible PC's sit at full extension for a few seconds then catch air and take off. Enough of a pause to make me look over my shoulder to see what was going on. They were not ragged out, and happened a couple hundred jumps apart. Not sure what it was, but they were definetely cocked. Made for an interesting bottom end on the jumps though!


mjosparky  (D 5476)

Apr 13, 2012, 10:43 PM
Post #12 of 18 (2379 views)
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Re: [SEREJumper] Mag Picture [In reply to] Can't Post

At 120 mph it is sometimes hard for the air to pass through the fine mesh and will tend to collapse it at first.

That is why I used to make my pilot chutes with open mesh. Fine mesh on the left open on the right.

http://i397.photobucket.com/...ydiving/DSCN0395.jpg

Sparky


MikeJD  (D 10605)

Apr 17, 2012, 5:25 AM
Post #13 of 18 (2168 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

I think I see it. He has his helmet on back-to-front.


tuffyjensen  (D 25830)

May 7, 2012, 10:58 AM
Post #14 of 18 (1819 views)
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Re: [MikeJD] Mag Picture [In reply to] Can't Post

Until the bridle gets to full extension and creates a solid base for the PC to inflate from, it will most likely not have a round inflated look to it. The bridle in this picture is just short of full extension. The container is not open, I think you are looking at the jumpers left foot.


packerboy  (C 34282)

May 7, 2012, 2:39 PM
Post #15 of 18 (1783 views)
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Re: [MikeJD] Mag Picture [In reply to] Can't Post

In reply to:
I think I see it. He has his helmet on back-to-front.

Laugh

I was going to say he forgot to bring his face...


Shredex

May 7, 2012, 8:00 PM
Post #16 of 18 (1746 views)
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Re: [adamqbishop] Mag Picture [In reply to] Can't Post

May I ask where you can order this magazine?


lookoutbelow  (A 63826)

May 8, 2012, 8:38 AM
Post #17 of 18 (1702 views)
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Re: [Shredex] Mag Picture [In reply to] Can't Post

In reply to:
May I ask where you can order this magazine?

It is free with a USPA membership.

http://parachutistonline.com/


jumpwally  (D License)

May 16, 2012, 5:59 AM
Post #18 of 18 (1434 views)
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Re: [mjosparky] Mag Picture [In reply to] Can't Post

I had one made like that as well years ago,,,did you ever worry about it being a potential snag ? i always worried,,never did tho...



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