ElyJs

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Posts posted by ElyJs

  3. I have an extended one ton dodge van with a white roof approx 20'x8'. I am looking for ideas to paint the roof with something that will be visible in the pattern from 1000 feet. The more obscene the better. I wish I was a bit more creative, but all I can think of is a 20' penis. Surely the internet can come up with something better. Ideas?

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    if you make the launch it will go. with a skydiving canopy just go ahead attach the toggles to the risers (don't set brakes), you won't be using those. the launch will be dangerous, make it as low consequence as possible. Most important: take video!



    Out of interest, what's your GL experience?
    You're making some pretty massive generalisations and then giving those out as advice.



    haven't broke myself yet, do you disagree with my generalizations?

  6. Wouldn't work. No matter how fast you ran on flat ground as soon as you jumped up you would come right back down. If the winds were too strong you would just get blown backwards.

    Ways to get around this would be either stand on the side of the mountain where the wind is blowing up the slope of have a buddy hold onto you and hope for a really strong wind. You could fly if he held on to your chest strap and the wind got strong enough.

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    I'd rather take say a safire 109 or similar on a wingsuit jump than my vengeance 135 - the safire is a much more docile canopy while fun to fly because of it's size, it behaves much better and dives less (planes out real fast) than the vengeance does, while being a good 2 sizes smaller. The vengeance can dive like hell even at the quite low (for a HP canopy) 1.3 WL I fly it at, while say my pilot 124 or safire 109 will not dive nearly as much or for as long. They also do not require counter steering or as much attention during opening.

    IMO it's safer for a new skydiver (or a new wingsuit pilot) to fly a 1 or 2 sizes smaller beginner/intermediate type canopy (= up to a sabre2, a sabre 1 is much more docile than a sabre 2) than fly a bigger xfire type canopy.



    Thanks for sharing, you bring up some good valid points. Between the Sabre I 150 and CF169 I will stick with the fact I can get the Sabre I to dive longer, but I will concede that you can def get a larger canopy to have a longer recovery arc then a smaller canopy with a more conservative planform. (I also fly a Bullet 14m ~150sq ft that has a recovery arc that rides on rails).

    I guess the question becomes whats dangerous to us new skydivers, a long recovery arc or a quick low turn to avoid, traffic/object etc on a twitchier canopy

    C. Some reasons for differences in performance between large and small
    canopies:
    1. Turns: In general, the smaller the canopy, the shorter the lines. Its true that
    two proportionally scaled canopies may have similar full glide speed at the
    same wing loadings, but they turn very differently. The big canopy, with its
    long lines, has relatively sluggish reaction to the controls, and the small
    canopy has relatively quick reaction to the controls. This is due to the fact
    that the large canopy must move the jumper a much greater distance out to
    the side, in order to achieve a certain bank angle needed for any given turn
    rate. This means that the smaller version of a canopy will feel much more
    agile, even if flown at the same wing loading.
    2. Flaring: A dynamic flare is one that results in a change in flight direction
    from a descending path to one parallel with the ground. This requires a
    change in the angle of the canopy, when viewed from the side. (Initially, the
    amount of the angle change is about equal to the angular change of the flight
    path.) This angle change is accomplished using toggle a movement that
    causes the jumper to move out in front of his natural hanging place under the
    canopy. The long lines of a big canopy require the jumper to be moved a
    greater distance out in front to achieve the same angle. Shorter lines mean
    that the jumper doesn’t need to move as great a distance forward to achieve
    the same angle. This means the toggle movement must be more aggressive
    on the larger canopy, compared to the smaller canopy, even at the same
    wing loading.
    3. For similar reasons to those above, the smaller canopy will also dive more in
    hard turns, when compared to a larger scaled canopy, even when flown at
    the same wing loading.



    II. General Concepts that are frequently misunderstood
    A. Different canopy models of the same size may perform differently, but they will
    fly approximately the same speed.
    Wing loading is the biggest determinant of speed. A Stiletto 190 is not really faster
    than a Sabre 190, or even a PD 190! Other aspects of performance will be different,
    however. (Turn rate, glide angle, etc.) These differences may influence a person’s
    impression of speed.

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    So a Sabre 150 is going to dive a lot more then a CF 170



    No way.



    At thsese lower wingloadings I feel size matters most in my perception of how a cnopy flies. The speed flying straight should in theory be the same. A CF has a longer recovery arc but I feel between a 190 and a 170 especially, size makes a larger difference.

    My personal experience is exactly as stated comparing a CF2169 to a Sabre I 150

    Willing to listen to your thoughts on the issue.

    www.performancedesigns.com/docs/wingload.pdf Interesting reading

  12. You are right small canopy at that number of jumps may equal pain. But thats not really the point.

    This forum is being destroyed by the banter you see in the 10 posts preceding this. Moderators are put in place on almost any message board worth reading so not every topic disintegrates into personal attacks and arguing. It would be nice if there could be better theoretical discussion.

    If someone makes a post "Am I ready to downsize" then flame away.

    Dave's comment "Fuck You" I mean come on! Tearing apart everyone's post with quotes? It just ruins the integrity of the forum, even if he does mean well.

    Anyways I am going back to lurking, heres to improving the quality of posts!

  13. Thanks for making a relavant post. On any other forum Dave's behavior would not be acceptable. Hijacking a thread and then chastising an anonymous poster, would get you booted from any other internet forum. Whether you are right or wrong the dialog ruins any interesting conversation about canopies. In fact this entire forum is ruined by posters that interrogate everyone and therefore prevent most valid discussion about any flight characteristics. Usually moderators prevent forums from heading down this path. Sadly do dz.com the moderators are participating instead of helping this issue. Too bad really.

  14. I already have a spectre 190 that I got a good deal on, so now I just need to pick up a container and reserve. I think the v350/v352 will work because in a few years I may decide to move down to a 170. They are sized for the same canopies only difference is the dimensions was is skinnier in the width and thicker the other is wider in the width and flatter in profile. That the real size issue I have.

  15. I will be picking up a new vector 3. I am curious on thoughts concerning getting a wider vs thicker container. For example v350 vs v352. One is 10 and 12 inches wide and 5.5 thick and the other is 12 and 14 and 4.25. I am a bigger guy 6'3 with plenty of real estate on my back. What considerations are important concerning these measurements. I am a long ways off from getting a wingsuit, but could def see it in my future so was leaning towards the lower profile.