Forums: Skydiving: Gear and Rigging:
Crystal Ball ?

 


piisfish

Oct 18, 2006, 2:55 AM
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Crystal Ball ? Can't Post

From one recent skyhook thread in the gear forum, it seems a part of tandem equipment is/was called crystal ball.

What is this ball ? On which equipment is/was it used?


Premier slotperfect  (D 13014)

Oct 18, 2006, 3:33 AM
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Re: [piisfish] Crystal Ball ? [In reply to] Can't Post

The crystal ball was the RSL handle on the Vector Tandem and the Sigma. The original one was clear (thus the crystal ball moniker), then they became white, now they are gone - replaced with the yellow tab because of the Skyhook.


piisfish

Oct 18, 2006, 3:50 AM
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Re: [slotperfect] Crystal Ball ? [In reply to] Can't Post

was it used to release the RSL ?


USPA  (D 81812)

Oct 18, 2006, 5:31 AM
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Re: [piisfish] Crystal Ball ? [In reply to] Can't Post

No It was intended (apperently never used) as a secondary reserve handle, since on a tandem you couldn't use the reservehandle with your right hand. (passenger was in the way). Making the reserve handle a loop made the ball redundant.

Also the ball frequently interfered with the 3 ring system, making it possible for the system to lock up. (don't know if this ever happend during a live cutaway).

Also for the trivia: The yellow tab didn't replace the crystall ball, it was always there.


piisfish

Oct 18, 2006, 5:34 AM
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Re: [USPA] Crystal Ball ? [In reply to] Can't Post

any pictures/diagrams available ?

so if I understand correctly the ball is a duplicate for the reserve handle, but on the other side ?


USPA  (D 81812)

Oct 18, 2006, 5:45 AM
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Re: [piisfish] Crystal Ball ? [In reply to] Can't Post

see: http://www.relativeworkshop.com/pdf_files/09121.pdf

For a picture

See:
http://www.relativeworkshop.com/pdf_files/09351.pdf

Page 14 for function explanation


piisfish

Oct 18, 2006, 5:50 AM
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Re: [USPA] Crystal Ball ? [In reply to] Can't Post

It is Crystal Clear now thank you Smile


Premier slotperfect  (D 13014)

Oct 18, 2006, 6:20 AM
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Re: [USPA] Crystal Ball ? [In reply to] Can't Post

Quote:
The yellow tab didn't replace the crystall ball, it was always there.

You are correct sir! I mis-spoke - pulling the yellow tab would disconnect the RSL, pulling up and out on the crystal ball would deply the reserve.

Thanks for clearing that one up.


psychoswooper  (D License)

Oct 20, 2006, 6:11 PM
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Re: [USPA] Crystal Ball ? [In reply to] Can't Post

In reply to:
No It was intended (apperently never used) as a secondary reserve handle,

I personally know of 2 cases of the ball being used . And these were pre-Cypres days, so 4 fatalities were averted. You can see my post about them on the " skyhook downsides" thread


USPA  (D 81812)

Oct 20, 2006, 11:04 PM
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Re: [psychoswooper] Crystal Ball ? [In reply to] Can't Post

I read it, that's why I used "apperently" instead of just never.

Did you contact Bill Booth already on those cases? And were they on Vector II ?

In case, they're still redundant now... :)


NelKel  (D 25024)

Nov 5, 2006, 7:00 PM
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Re: [piisfish] Crystal Ball ? [In reply to] Can't Post

Sup? Actually if you looked at the Vector II system you will notice the crystal ball is a direct link to your reserve pin, and the reserve loop is a secondary attachment to the reserve pin.

You will probably have to inspect the system for clarity of my statments, but for a T-I exiting the aircraft and going strait to reserve handle will activate the reserve, however it will confuse the T-I because he will most likely not be able to complete extract the reserve cable. The way it was made would prervent extraction of the entire cable because it would jamb shortly after clearing the reserve loop. The reserve pin (connected to the crystal ball) would jamb against the cable housing.


Premier skydiverek  (C 41769)

Nov 6, 2006, 12:32 AM
Post #12 of 15 (895 views)
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Re: [NelKel] Crystal Ball ? [In reply to] Can't Post

In reply to:
A -I exiting the aircraft and going strait to reserve handle will activate the reserve, however it will confuse the T-I because he will most likely not be able to complete extract the reserve cable. The way it was made would prervent extraction of the entire cable because it would jamb shortly after clearing the reserve loop. The reserve pin (connected to the crystal ball) would jamb against the cable housing.

From Bill Booth:

"I designed this RSL 25 years ago in response to problems associated with the conventional ripcord-cable-through-ring method. It is still the only RSL system that does not damage the reserve ripcord cable each time it is used. However, it was not an attempt to build in a "ripcord stop". The Velcro joint on the reserve top flap and static line lanyard, should allow the static line pin to rotate, and the reserve ripcord eye to slip off, before the pin is anywhere near the housing."


NelKel  (D 25024)

Nov 6, 2006, 5:41 PM
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Re: [skydiverek] Crystal Ball ? [In reply to] Can't Post

should allow the static line pin to rotate, and the reserve ripcord eye to slip off,<<<

Skydiverek, In a perfect world? the key wording in Bill's statment is "should allow".

I happen to know for fact it has happened. It has caused the T-I to take a second look at what he pulled, relax a bit during reserve inflation, then we told a rigger about the inability to completely extract the reserve cable. We looked at the rig, still opened, and found the reserve pin all the way up to the cable housing preventing the complete extraction.

Once we pushed it back and forth a bit it slipped off.

So it can happen, and has happened. Ofcourse this is little potatoes, because the reserve pin will clear the loop regardless of weather the Crystal ball or the reserve handle is pulled.


Pablito  (D 24827)

Nov 7, 2006, 6:30 AM
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Re: [slotperfect] Crystal Ball ? [In reply to] Can't Post

The crystal Ball goes only on the Tandem Vector 2 and the sigmas equipped without a Skyhook.
If the sigma has a skyhook the crystal ball is highly recommended to remove it.
Cielos Azules
Pablito


Premier skydiverek  (C 41769)

Nov 7, 2006, 7:09 AM
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Re: [Pablito] Crystal Ball ? [In reply to] Can't Post

In reply to:
If the sigma has a skyhook the crystal ball is highly recommended to remove it.

And here is WHY, since someone is probably gonna ask:

http://www.dropzone.com/...i?post=626144#626144

Smile



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