High speed shutdown

[morris 0]

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I disagree with a lot of what you said, Dave. If you pop up during a swoop you should not go into a dive to return to the ground. You should provide a good amount of toggle input during that final descent so that it is done gradually with minimal vertical speed. You should also save some flare for just before touchdown.

I´m with you, raymod2.
This results in a 2:1 lead for the "non-divers"...

[morris 0]

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It is quite possible to stand up your landing after a pop-up and I have done it myself many times, even in zero wind.

Yes, it is.
But the more headwind you have, the less sense makes a (high) pop-up.
This is because the price you pay - a loss in (air- and) groundspeed - is (in a headwindscenario from a certain strengh/windspeed on, depending on how high you pop-up, which should be less in headwind, blah blah blah) too high for what you get - an increase in airtime.
While the price in airspeed doesn´t change with the wind, the price you pay in groundspeed (the one that counts for distance) is less in a tailwind.
So a really high pop-up makes the most sense in a downwindscenario - and I for sure don´t wanna try to stand up one of those. Even an ultrafast sprinter/runner would take a very high risk of injury.

[davelepka 4]

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If you pop up during a swoop you should not go into a dive to return to the ground

First off, I did not mean to suggest that your canopy would 'dive', as-in an abrupt and significant pitch down of the nose. That, of course, would be a bad idea anywhere near the ground.

However, there is only one way for your canopy to go up, and that is for you to swing forward of the center and effect a pitch up of the nose. Once you have done this, short of a stall, there is no way to get back down without your body returning to a position aft of the center. Once this occurs, however slight it may be, the canopy can ptich down (again, however slight it may be) and you may begin a descent.

If you happen to meter the degree to which your body swings aft of the center, and stop it just as the pitch is effected enough to allow the wing to sink, then so be it.

If you happen to allow your body to swing further back, and allow for a more rapid descent, then so be it.

In either case, you will need to reverse the swing of your body and return it to a point forward of the center to effect the picth up allowing you to flare the canopy.

While the exact timing of the events may vary, you cannot go pop up, come back down, and flare the canopy withou the fore-aft-fore swing of your body under the canopy. With that said, it's the final 'fore' swing of your body that eats in to the energy that would be used for flaring the canopy, reducing the effectiveness of the flare.

If you want to try to stand up such a landing, where you have intoduced a vertical component to the strictly horizontal movement you are used to, is entirely up to you.

In the case of landing into the wind, the inherently lower touchdown speed afforded by the headwind might make the overall impact such that you could stand it up. I mentioned that I like to pop up in a good headwind, just becasue I can and still have good airspeed left for a soft touch down.

In the case of a downwinder, it's probably not the best idea. With no 'flintstone braking' available to bleed off the excess forward speed, plus the introduction of the vertical component, you're taking a chance that the sum total may be beyond your ability. The slide-in manuver, on the other hand. provides for easy management of the forward speed, leaving you only to contend with the vertical component. The advantage to the slide-in manuver is that it prevents a head-over-heels tumble at high speed, a situation which has actually killed jumpers in the past.

In terms of competition, the pop-up should only be used no wind or down wind scenarios, where the increased time aloft allows the winds to carry you down the course that much further. This is similar to the use of brakes or rear risers to minimize your descent rate when returning from a long, upwind spot.

When running into the wind, remaining level, without inducing increased drag due to the pop-up, will net you a longer swoop. This is similar to returning to the DZ from a long, downwind spot, where too much brakes or rears will induce drag, reduce airpseed, and have you landing short of the DZ.

It is true that while returning the DZ from a long, downwind spot, a touch of brakes or rears will help to imporve the L over D ratio, as full flight is generally less than optimum in that department. When you look at the same concept while swooping into the wind, the input used to level out the canopy, and maintain level flight takes care of bumping up the L over D ratio, any additional input, such as used for a pop up, would be going to far, and giving 'D' the upper hand over 'L'.

[morris 0]

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However, there is only one way for your canopy to go up, and that is for you to swing forward of the center and effect a pitch up of the nose.

So far so good, agreed...

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Once you have done this, short of a stall, there is no way to get back down without your body returning to a position aft of the center.

Don´t agree at all!
While you need to pitch the nose up by swinging forward of the center to start climbing, you don´t need to swing back aft the center to start descending.
Lift is a function of stuff like (to name just some) profilcurvature (which can be changed by the pilots as well by applying more or less brakeinput), angle of attack (your fault in my opinion is that you are only thinking about this one) and airspeed (the most important one you´re missing).
Imagine someone is climbing by swinging forward and pitching up the nose. Now he would float up there forever if he wouldn´t swing back AFT the center to pitch down the nose??? No, even if he would stay where he is - forward of the center - or swing back to any other point forward of the center (but closer to the center) or swing back exactly "into" the center - but NOT AFT the center - he would start descending/sinking as soon as the airspeed goes down!!!
Once you climbed you can only maintain level flight (while the airspeed goes down/is decreasing)) by a) applying an even higher angle of attack by pitching the nose even further up (which is difficult to do because you already swung forward, now swinging even further while flying at an already lower airspeed could only be achieved for a short moment by applying a serious amount of rear- or brakeinput, not the best choice) or b) by gradually changing the profilecurvature by appling more and more brakeinput.
You will however soon run out of too much airspeed (and controlrange) to keep on playing this "level-flight-game" (if you keep on playing it nevertheless, you gonna stall the canopy) and gonna start descending - even if your body is still forward of the center or in the center but not after the center!
I agree however partly with what you are saying.
I think the perfect pop-up is a swing forward of the center in the beginning, than a - the slower the better - move back of your body closer to the center - BUT STILL IN FRONT OF IT - followed by a second little swing forward during the very last moment of the flight, the moment your applying this very little something of toggleinput that you might have left for just before touchdown.

[morris 0]

And to make all of this not to theoretical (and therefore maybe boring), here´s a low resolution cellphonevideo of my "somersault-run" that came up.
As the touchdown is too far away and the resolution too low for the somersault to be visible, feel free to post your own somersault-freestyle-videos here!
Stu, I know I should have stayed on my rears longer to go even further, but this very run I´m glad I didn´t!

http://www.youtube.com/watch?v=LLCgGSdnoU0

[AggieDave 6]

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In terms of competition, the pop-up should only be used no wind or down wind scenarios, where the increased time aloft allows the winds to carry you down the course that much further.

No, not really. It depends on the headwind. When you're loaded closer to 3 than 2 and you have the speed and a lighter headwind, you can still gain ground with a bit of a pop up.

--"When I die, may I be surrounded by scattered chrome and burning gasoline."

[morris 0]

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***In terms of competition, the pop-up should only be used no wind or down wind scenarios, where the increased time aloft allows the winds to carry you down the course that much further.

No, not really. It depends on the headwind. When you're loaded closer to 3 than 2 and you have the speed and a lighter headwind, you can still gain ground with a bit of a pop up.

That´s my opinion as well, Dave. Absolutely agree on this...