Cypress resetting?

[EricaH 0]

I believe a pro 1 pin cypress is activated around 1200 feet, then the reserve is actually deployed around 800 - 700 feet.
My question is this, if you were to pull around 1000 - 1100 ft & have a fast opening, does the cypress turn itself off (not fire)?

There is no can't. Only lack of knowledge or fear. Only you can fix your fear.

PMS #227 (just like the TV show)

[dragon2 2]

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I believe a pro 1 pin cypress is activated around 1200 feet, then the reserve is actually deployed around 800 - 700 feet.
My question is this, if you were to pull around 1000 - 1100 ft & have a fast opening, does the cypress turn itself off (not fire)?

It´s an expert cypres, and 1 or 2 pins doesn´t matter in this case

It´s supposed to deploy your reserve at 750 ft. If you open at terminal at 1k I think you will be ending up with a lot of chute above your head...

If it was a subterminal opening, ie an emergency exit, maybe it won´t go off, but below 1500 ft i´m going for my reserve, to be sure.

The cypres will only turn itself off (well not really but it won´t activate anymore) at a hight too low for it to do any good, which is 130 ft.

All this is in the cypres manual, try and get your hands on one? It´s also available as a pdf file online somewhere.

ciel bleu,
Saskia

[PhreeZone 20]

All your answers are in the Cypres owners manual (Including why there are not "stages" in its working). Basically the unit is activated when the cutter fires. The Cypres does the math from exit to what your speed will be at ~750 feet. if it thinks that there is no way for you to slow down to the proper speed as you go through 750 feet then it will fire the cutter.

If you pull at 1000 feet and have an opening that is fast enough that the Cypres does not fire... then you'll most likely be knocked out by that hard of an opening.

www.cypres-usa.com

Yesterday is history
And tomorrow is a mystery

Parachutemanuals.com

[skydiverek 63]

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All this is in the cypres manual, try and get your hands on one? It´s also available as a pdf file online somewhere.

Right here
http://www.cypres2.com/userguide/CYPRES_2_users_guide_english.pdf

It is for Cypres 2, but the actvation parameters are the same for Cypres 1 and Cypres 2.

[EricaH 0]

Thanks for the info. Read the manual, but it didn't really say.

I had a low pull this weekend (round 1100), in saddle bout 800 & it didn't fire . Just had a check-up & battery replaced in June.

That was a crazy fast opening for me - ultimatly not something to repeat!

There is no can't. Only lack of knowledge or fear. Only you can fix your fear.

PMS #227 (just like the TV show)

[Blahr 0]

You would have to have been going faster than 78 mph vertically through 750 ft for the cypres to fire.

Given that you pulled at 1100 and were in the saddle at 800 ft (can you say "ouch"?), you did NOT meet the requirements to activate the cypres.

Your post seems to indicate that you believe it should have fired. From everything I have heard and read, it should NOT have fired under the circumstances that you described.

[Hooknswoop 19]

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You would have to have been going faster than 78 mph vertically through 750 ft for the cypres to fire.

Given that you pulled at 1100 and were in the saddle at 800 ft, you did NOT meet the requirements to activate the cypres.

750 feet if you are belly to earth, with the Cypres in the reserve container on your back, in your burble. If you pull above 750 feet, but very low, the transition from belly to earth as your canopy opens, may 'trick' the Cypres into believing you are lower than you really are and firing above 750 feet.

Derek

[Samurai136 0]

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It activates the release unit when it detects a rate
of descent higher than 78 mph (35 m/sec) at an
altitude of approx. 750 feet (approx. 225 meters)
above ground level (AGL). In the event of a
cutaway below this height CYPRES will operate
down to approx. 130 feet AGL, however activation
will not occur unless sufficient speed is obtained.
Below approx. 130 feet (approx. 40 meters) AGL
opening is no longer useful. For this reason,
CYPRES ceases operation below approximately
130 feet AGL.

A Student or Expert CYPRES will not work if
the aircraft is exited before it reaches 1500 feet
(450m) above the airfield and intended DZ. In
case of a Tandem CYPRES 3000 feet (900m)
must be reached.

The CYPRES only turns itself off under 130'. If your 1000'-1100' pull was from an exit altitude under 1500', the CYPRES would never have been activated.

Ken

"Buttons aren't toys." - Trillian
Ken

[Hooknswoop 19]

http://www.cypres-usa.com/cyp13.htm

Makes for good reading too.

Derek

[EricaH 0]

Thanks so much for clarifing. I was under the impression that it activated (but not fire till 750')around 1,200' - glad I was wrong.

Yah, ouch but happy was the opening.

There is no can't. Only lack of knowledge or fear. Only you can fix your fear.

PMS #227 (just like the TV show)

[ZoneRat 0]

The Cypress 1 will fire.

I didn't pitch at a grand. I pitched a little higher... about 1500-1800. I was jumping a Spectre at the time.. Sniveled through the Cypress decision alt. Moments later it fired. The reserve ploped down and slowly filled with air. Uneventfully landed a stable bi-plane in light winds. It was on Safety Day .

Protrack said I saddled at 800'...

btw: The Cypress was doing exactly what it was supposed to do. I was the one that wasn't.

So. Yes. My experience has been that the Cypress 1 will not abort a decision to fire even if your main is deployed.

“There are more things in Heaven and Earth, Horatio, than are dreamt of in your philosophies.”

[diablopilot 2]

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750 feet (approx. 225 meters)
above ground level (AGL).

Note that the 750 figure is based on a body falling somewhat stable in a belly to earth position, and has been figured to factor in the burble effect of the human body. In other orientations it may fire as high as 1000 AGL or more.

----------------------------------------------
You're not as good as you think you are. Seriously.

[Auryn 0]

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The Cypress 1 will fire.

I didn't pitch at a grand. I pitched a little higher... about 1500-1800. I was jumping a Spectre at the time.. Sniveled through the Cypress decision alt. Moments later it fired. The reserve ploped down and slowly filled with air. Uneventfully landed a stable bi-plane in light winds. It was on Safety Day .

Protrack said I saddled at 800'...

btw: The Cypress was doing exactly what it was supposed to do. I was the one that wasn't.

So. Yes. My experience has been that the Cypress 1 will not abort a decision to fire even if your main is deployed.

I have had a similar experience and my cypres did not fire.

2 way freefly. lost altitude awareness on both my part and the person I was jumping with.

he threw out first. He went belly and threw out right in front of me.

I of course immediately went belly and heard my audible was flat lined (1500 ft. flat line) and immediately threw out my main.. I had always told myself I would go for my reserve in that situation, and that went right out the window. I wanted nylon and went for the nylon I had a lot of practice deploying. I watched my alti as I deployed. sitting in at around 1k, but my alti is a piece of junk, so I'm not sure where it was.. the opening was not that hard, so who knows. it was really damn low for sure.

cypres did not fire.

I think the margins at that point are so narrow, and the factors involved are so many that a cypres fire vs a non cypres fire are hypothetical arguments at best. The margins are at 1 second differences, and we are not a sport that is normally designed for 1 second differences.. if you are dealing with 1 second differences, you are in an emergency, and I definately want my cypres to be there in those situations.


the device does what it is supposed to do. and I would much rather face a dual out b/c I went low than it not doing it's job at all.. and it's a hell of a lot better than any other AAD I have seen in action.. Ive seen 2 FXCs misfire to the tune of 1000 + feet.

If you want an AAD, you have to accept that it might just work. Your attitude about your cypres is the same as mine. if mine had fired, I would've accepted that it was my fault, not the cypres's. I should've been open 1800 feet higher than I was.. or 8 seconds of freefall time higher than I was.

I don't approach this sport where margins should be to the tune of 1 second, nor do I expect my gear to be that precise. It is my responsibility to prevent it from getting to that point in the first place.


Blue Ones !

D 27808

[EricaH 0]

I was belly to earth slowing down a track @ the time I pulled.
I totally agree - I would have been just fine w/ my cypress firing, that is, it doing it's job. It would have been a bummer to lose the free bag & then to deal w/ 2 out in an area I'm not familiar with, but better than if nothing had happened.
My concern was it's lack of firing. On my jump partner's video you can see him wave off @ 1500' & his protrack says he was in the saddle @ 1100'; you can see me in a perfect boxman position in his video, well below him.
You do make a great point about the 1 sec. difference between firing or not, burbles & the like. Since a few months ago my cypress was given a clean check-up, I'll go w/ that I pulled just the second before it would have fired. I did check my reserve pin area & all is secure (it didn't fire & then not deploy).

There is no can't. Only lack of knowledge or fear. Only you can fix your fear.

PMS #227 (just like the TV show)

[ZoneRat 0]

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I had always told myself I would go for my reserve in that situation, and that went right out the window.

Yep. Same thing. I always told myself that if the audible flatlined I'd go silver. When it did... I immediately pitched my main.

I think you're right about variability of firing. I've been told that body position has a lot to do with the type of burble the cypress sees... and effects it reading of altitude, which effects it's decision/ firing alt. Lots has been written on cypress theory here in the past.

Yep. I learned a lot from that one jump.

“There are more things in Heaven and Earth, Horatio, than are dreamt of in your philosophies.”