kissrg
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Posts posted by kissrg
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Other's opinion about Sigma Micro?
I am just hesitating between a normal Sigma with Icarus 365 main and a Sigma Micro with HOP 330 main.
Robert -
Try to balance the turn with resetting the left or right steering line at the toggle.Robert -
Line trim is ok? Primary/secondary brake lines?
Robert -
QuoteQuoteIn addition, a spinning malfunction will be likely to get a faster deployment anyway from a skyhook.
Faster how? Not altitude loss. Think about this: you have a low speed cutaway with a skyhook from a fully inflated main (lets say it's just not controllable), the skyhook does it's job and your reserve opens in 150-200'. Now, on your next jump, you have a bag lock, you cutaway, and the skyhook does it's job. Do you think your reserve is going to be open in the same 150-200' that it was in the low speed situation? I hope not! The same concept applies to any scenario where the rate of decent may be accelerated.
Yes, there may be other variables such as getting deployed to the side from a spin, but which way is the reserve going to be facing when it pushes the slider down? Is it going to be facing the sky, so that it will level off quickly, or will it be facing the ground, in which case it will dive (and loose more altitude)?
In time you may get a faster deployment from a spinning malfunction with skyhook, but the altitude loss is probably the same. Take account that the spinning canopy have a considerable vertical descent as well so what you win from the spinning that you loss with the vertical speed.
Robert -
QuoteBut durability? When was the last time you had to worry about snags and wear on a metal ripcord?
Paratec bulletin from 09/08/2004:
'During a routine control (straightening the cable after an RSL activation) came to attention, that the swaging of a reserve ripcord pin was insufficient, causing the ripcord cable to disconnect from the pin with very little force.
The same happened with 4 other ripcords (3x Next Student, 1x Next Tandem)'
PdF bulletin from 09/15/2004:
'A user reported the breaking of one of the coated cables of a MMS metal cutaway handle for main canopy'
UPT (RWS) bulletin from 01/30/2007:
'Ripcord damage found in field on January 18, 2007. Rig was an older Vector II.'
Robert -
QuoteAre you sure they are designed to be PRO packed? I would check out the manual if I were you. Bill Booth has stated on these forums that he believes tandem rigs should always be flat.
They are talking about pro packing in the new sigma manual.
Robert -
Bill,
Will you offer them for Sigma tandems as well?
Robert -
Quote
Going straight down at 45 mph would be kind of neat.
If my calculation is correct the van should go down at about 230 mph in a 20% grade to reach 45 mph vertical speed.
Congratulate to the driver!
Robert -
I have a Jack The Ripper knife as well but some others prefer metal knifes for tandem. Nowdays a carbon fiber version appeared in the market. What do you think? Any experience?
Robert -
There is a good article about 'Fundamentals of Accuracy' in the Eiff Aerodynamics site:
http://eiff.com/manuals/accuracy.html
Robert -
QuoteHi kissrg,
I am curious; does the PdeF manual say to put the cable down into the grommet like that? Or should the cable be out of the grommet and around the pin?
It seems to me that with things like in that photo you are creating a harder pull when activated manually.
Thoughts?????
Jerry
I am sure the cable should be out of the grommet. But it was said if you remove one pin from LOR-2, then the cable can slip into the grommet and you will be not able to pull the ripcord manually. I am not a rigger I'm just wonder the others' opinions.
Robert -
QuoteQuoteBy the way, it should not be used in any other way that what it has been designed for (with 2 PINS, the special handle etc...)
Since you can get the Atom Legend from PdF without the LOR-2 system, I don't see why it can't be modified afterwards.
1. Replace ripcord
2. Replace double loops
3. Remove RSL's
It is in the manual, so they must be OK with that...
You are right though, that modifying it to a single side RSL probably isn't endorsed by PdF and riggers who do that may open a whole can of worms, should something not work out as planned...
Modifying LOR-2 to single side RSL is not permissible in Hungary. It was said that the reserve container grommet is bigger sized for the LOR-2. So if you use only one closing pin then the loop of the ripcord can go into the hole of the grommet and it will causes a hard reserve pull.
Robert -
QuoteHi MooChooser
Yes I am serious,
The best videos from malfunctions an blown up canopies are taken from close
distance………………….
Let me try to explain my thoughts with a simple picture:
see attachment
Have a nice day
Wim
And what about the burble of the tandem pair?
Robert -
QuoteEdit to add: I forgot to clarify I'm not talking about "I had to hook it it because the winds were such-and-such" moments, I'm talking about regular day-to-day run of the mill tandem landings.
What is safer: Doing hook turns day-to-day or doing it only occasionally when the winds are such-and-such?
Robert -
QuoteQuoteIn other words can you imagine if your normal risers released but the riser covers would stay closed?
Riser covers have NOTHING to do with that. Please check the LAST paragraph and the LAST photo on this page:
http://www.bpa.org.uk/skydive/pages/articles/dec03/cutting-away.html
That's what's Bill Both and I meant few posts ago in this thread.
Your misunderstanding probably comes from the fact that Bill Booth talked about TWO SEPERATE scenarios: FIRST one with a baglock and closed riser covers, and SECOND one with two canopies out (no riser covers mentioned, since that's not the problem in this SECOND scenario).
No personal attack intented
My poor English may causes the problem :)
I have no problem with the second scenario but I don't understand the first one. Bill stated that "If you have a bag lock that doesn't open your riser covers ... you can't breakaway." I agree with that statement but in that case it is just the same what type of risers you have, isn't it?
Robert -
QuoteQuoteQuoteIf you have a bag lock that doesn't open your riser covers, or two canopies out with your risers are drawn back across your shoulders, you can't breakaway.
Bill,
I understand the "two canopies out situation" but if there is not enough drag to open the riser covers then I cannot see any difference between reverse or normal risers. Did I miss something?
Robert
Yes. If the risers are drawn BACK ACROSS the shoulders, there will NOT be a room for the rings to "flip" and release. In other words, the "flip through motion" will be restricted by the shoudler pressure AGAINST the 3-ring system.
In other words can you imagine if your normal risers released but the riser covers would stay closed?
Robert -
QuoteIf you have a bag lock that doesn't open your riser covers, or two canopies out with your risers are drawn back across your shoulders, you can't breakaway.
Bill,
I understand the "two canopies out situation" but if there is not enough drag to open the riser covers then I cannot see any difference between reverse or normal risers. Did I miss something?
Robert -
QuoteI had half my canopy collapse at 90-100 feet. Not pretty.
![[:/]](/uploads/emoticons/dry.png "[:/]")
What kind of circumstances did it happened in? And what was the tandem main?
Robert -
QuoteFrom my own experience: try to avoid getting your finger stuck in the pipe at pull time...
I agree. Two weeks ago a dude here after changeover to throwout tucked two of his fingers into the pipe and so he was not able to get rid of the pilot chute. Finally he opened his reserve at 2000 ft. Fortunately the main stayed in the container otherwise the situation could be more dangerous...
Robert -
QuoteThere were issues with turbulence re the initial and early model HOPS but we don't have a problem at all with what we use now.
Could you describe the difference between early and current models of HOP?QuoteI would rather a HOP than any other canopy!
What kind of other tandem mains have you tried?
Robert -
Do you have any tension knots with flat packed canopy? Because I think pulling up the slider arranges the lines when flat packing.
Propacking a tandem canopy you can see that the heavier steering lines are always located underneath. So after laying the canopy to ground I sort the front, rear and steering lines again from the risers to the canopy to avoid tension knots. What about this method?
Robert -
QuoteQuoteQuoteQuoteJust another little question. Your manual recommends to switch off the unit while riding the plane back down. Did you ever try that while doing a tandem that refused to jump (In some airplanes this means I keep my passenger hooked-up)
a very good question.
i have just read this entire thread because i am in the market for an 'aad'.
i am a commercial s/d photographer and have to land in the plane from time to time because of changing wx conditions. it would be a pain in the ass to turn a unit off for me. and if a tandem had a refusal and were the last in the plane then it would be not only unsafe but illegal to get out of the rig to turn the unit off.
i was sold on vigil until the last post and i'm suprised there has been no response to the question as it was posted in jan and it is now may. was that symposium so good they forgot about this thread?
It may be a good question but you should turn off both units (Tandem Cypres and Vigil in Tandem mode) if the descent rate exceed the 78 mph.
Robert
WHY??
One of the manufacturers says it is ok to leave it on while decending. They even made an explicit advertising statement about this subject some years ago.
I do not know why the other manufacturer says switch off in decent mode but they must have a good reason.
WHY? Because otherwise your reserve will be opened at about 2000 ft according to both AAD's manual.
Anyway there is a better idea from Vigil manual (http://www.vigil.aero/pdf/Eng.pdf):
"When the user decides to ride down with the aircraft in lieu of jumping, the pilot must be advised of the status of your Vigil to limit his descent rate in function of the programmed mode 45mph (20m/sec) for Student and 78mph (35m/sec) for Pro and Tandem (this is especially important for Vigils programmed in Student mode)."
QuoteQuoteJust another little question. Your manual recommends to switch off the unit while riding the plane back down. Did you ever try that while doing a tandem that refused to jump (In some airplanes this means I keep my passenger hooked-up)
a very good question.
i have just read this entire thread because i am in the market for an 'aad'.
i am a commercial s/d photographer and have to land in the plane from time to time because of changing wx conditions. it would be a pain in the ass to turn a unit off for me. and if a tandem had a refusal and were the last in the plane then it would be not only unsafe but illegal to get out of the rig to turn the unit off.
i was sold on vigil until the last post and i'm suprised there has been no response to the question as it was posted in jan and it is now may. was that symposium so good they forgot about this thread?
It may be a good question but you should turn off both units (Tandem Cypres and Vigil in Tandem mode) if the descent rate exceed the 78 mph.
Robert
Quote
Keep us posted on your thoughts after you have done tandems out of the PAC?
Unless your a midget, the door is way too short to enjoy getting out of.
It seems to me getting out not so difficult for bigger ones
Robert
Sigma Micro
in Gear and Rigging
I use a Sigma with Sigma 370 main. I like it but it is a little bit wide at the shoulder for me. So that I considered the Sigma Micro. Is there any other difference than size between standard and Micro Sigma?
Anyway I have no problem to pack the Sigma 370 main into the container so I thought putting the HOP330 into the Micro would be the same. Is it not right?
Robert