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greeny 0
Ronald / Will,
[ Based on my experiences above and from observation of others I believe on low freefalls a 0.5 second delay is better than a 'throw and go'. ]
Depends on the altitude
I 'm trying not to put too many numbers on this:
I agree with this above a certain height (maybe 200 0r 220ft). As 1 sec of free fall only equals a 16 foot drop and gives the PC and canopy a bit more airspeed to work with, that has to be good. I am also thinking a faster opening is more likely to be on heading.
That said once I get down to 175ft and work my way lower I no longer think I can afford to loose that 16ft. At this sort of height I think I need a big PC (currently 48zp)and to get it inflate ASAP, acting as an anchor. My aim is to almost have My PC staying still (as little drop as possible) and me dropping away from it (think PCA with no one holding it).
I was told the idea of not throwing my PC up but keeping it in my hand and inflating it prior to jumping.
I'll try to explain better.
Reaching up hold the PC in your hand (by bridle attachment)and while bringing your hand down, place the PC into the air, inflating it as you do so. The aim is to have the PC inflated and set in the air before you step off the object. I was told this works better with a shorter bridle (no burble due to no airspeed) and less distance to fall before your bridle is at extention. Your pins should be coming out by the time the PC passes the point where your feet were. You can inflate the PC as many times as you like and only step off when you are sure it is properly inflated.
I have not tried this yet but will be playing with it when I get back to the US in 8 weeks.
My point on all this:
I'm not worried about 'Snatch V Drag' my pins are coming out quickly with both. What I am worried about is when I have Minimum altitude, I need to keep it all. But when I have altitude, I can trade for some airspeed and will take as much airspeed as I can get to improve my opening performance.
Greeny
[ Based on my experiences above and from observation of others I believe on low freefalls a 0.5 second delay is better than a 'throw and go'. ]
Depends on the altitude
I 'm trying not to put too many numbers on this:
I agree with this above a certain height (maybe 200 0r 220ft). As 1 sec of free fall only equals a 16 foot drop and gives the PC and canopy a bit more airspeed to work with, that has to be good. I am also thinking a faster opening is more likely to be on heading.
That said once I get down to 175ft and work my way lower I no longer think I can afford to loose that 16ft. At this sort of height I think I need a big PC (currently 48zp)and to get it inflate ASAP, acting as an anchor. My aim is to almost have My PC staying still (as little drop as possible) and me dropping away from it (think PCA with no one holding it).
I was told the idea of not throwing my PC up but keeping it in my hand and inflating it prior to jumping.
I'll try to explain better.
Reaching up hold the PC in your hand (by bridle attachment)and while bringing your hand down, place the PC into the air, inflating it as you do so. The aim is to have the PC inflated and set in the air before you step off the object. I was told this works better with a shorter bridle (no burble due to no airspeed) and less distance to fall before your bridle is at extention. Your pins should be coming out by the time the PC passes the point where your feet were. You can inflate the PC as many times as you like and only step off when you are sure it is properly inflated.
I have not tried this yet but will be playing with it when I get back to the US in 8 weeks.
My point on all this:
I'm not worried about 'Snatch V Drag' my pins are coming out quickly with both. What I am worried about is when I have Minimum altitude, I need to keep it all. But when I have altitude, I can trade for some airspeed and will take as much airspeed as I can get to improve my opening performance.
Greeny
Faber 0
popping your pins dosnt mean your canopy get out faster,in that case you could use a 38´off sub 200ft right...
Nope you want a PC act as a ancor(see Greenys post),were you freefall away from the PC while the pc is pulling out the canopy while your freefalling away from it,that way you´ll get a flying canopy faster...
atleast thats my oppinion,and as long it keeps me alive,ill keep doing that
Stay safe
Stefan Faber
Nope you want a PC act as a ancor(see Greenys post),were you freefall away from the PC while the pc is pulling out the canopy while your freefalling away from it,that way you´ll get a flying canopy faster...
atleast thats my oppinion,and as long it keeps me alive,ill keep doing that
Stay safe
Stefan Faber
Faber brings up an important point that bears repeating. The force required to lift a packed canopy out of the container is surprisingly large, often larger than the force required to pop the pins. This is especially true when you jump larger canopies in the 300 range.
We use 80 pound breakcord on static-line jumps not to pop our pins, but to deal with the sudden shockload when it starts lifting your canopy out of the packtray.
We use 80 pound breakcord on static-line jumps not to pop our pins, but to deal with the sudden shockload when it starts lifting your canopy out of the packtray.
Faber 0
QuoteAre you guys switching out the closing loops for the low stuff?
actualy i only jump spectra loop theese days..
why?
to start whith i were too borred to shift the loops,then i realiced that you can have some high tention on your spectra loops and still get the canopy out,which means my loops right now(havnt dont anything low lately)is slightly tighter than i would have my dacon loops,but they still preform about the same...
That said i´ll still loosen the loops as soon as i will jump the low stuff again...
Others who had experience about this?
NOTE:i as i havnt been at terminal BASE ever so please take my experience whith a grain of salt...
Stay safe
Stefan Faber
You are assuming that the p/c orientation will allow the appropriate relative air flow to create the maxuimum drag force you desire to get you to line stretch.
You are also assuming the the deployment sequence will always occur as it is supposed to. i.e. from top the bottom you will have p/c, then mesh, then bridle, then the rest of it. Think about the reason that large p/c don't have external handles?
It is kind of like the toggle v riser debate. You need to look at the complete picture to see which method is better. Isolating individual characteristics is fine for simplifying the analysis but it all mist be put together prior to acting. i.e. you have to consider everything prior to doing a LOW jump.
I personally believe that if you did 100 test jumps. You would find that the average for method one would be better than for method two. The spread of distance/times would be less. I think you would have the fastest times in method two but not consistantly.
When pushing the limits of BASE jumping, you are not looking for the extreme edge of the bell curve, you are looking for reliability, repeatability, consistancy. You want to know that when I do this, that WILL happen. Otherwise you are simply playing Russian Roullette.
Stay Safe
Have Fun
Good Luck
p.s. I have assumed that it was a go and throw, no real delay. I have also assumed that the resistance forces throughout the deployment sequence are negligible. i.e. insignificant pin/velcro tension, canopy has clean access out of the container, etc.
p.s.s there are issues with how the canopy pressurises with the two "methods" of snatch and drag. Couple this with brake settings and wing loadings - this means that what is right for one situation, may not necessarily be correct for another.
Just my humble opinion.
The above could be crap, thought provoking, useful, or . . But not personal. You decide.
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