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frob last won the day on February 7

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About frob

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  • Birthday April 18

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    Like asking me to choose my favorite child.
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    Austin Texas
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  1. Great to fly. A few hours on the line with one and I wanted to buy it... Until I looked closely at the specs. The leading edge doesn't break down, so it is a long kite put away. While it is fine for many people it means I cannot transport it without wedging it in diagonally against the side wall. I have re-measured my vehicle a bunch of ways, diagonally, secured halfway up a wall panel, etc. Make sure it fits in your bag and vehicle. If you have room, it flies like a dream. Soft and gentle when you need it, and a moment later handles yank-and-spank motions as graceful commands.
  2. You wrote the line is LPG. Is the line really LPG, or the 85' x 150# Dyneema that is stock with the kite? The two products are different.
  3. Apart from the cost, have you considered quad line kites? In decent wind you can launch, fly, and land from the comfort of a lawn chair or beach lounge chair. Or even a wheelchair.
  4. No smooth ocean breeze near my house, so even calm air is variable. A 3 mph calm moment can be followed by a sudden surge, then go back to calm. One of the people I was flying with was using a Prism Jazz and could not hold it up, and my quad was struggling except during the moments of gusts, which is why the Kaiju came out. During these gusts it would shake and dance a bit, so the moment is used to dart to the edge of the window, but the kite behaved far better than I expected.
  5. The new Kaiju has certainly seen workouts outside, about eight hours over the month when winds were otherwise low. Not just me flying, I also handed it over to three others who struggled to fly those days. I sadly didn't get video, I've had both the red/black and blue/white up together, including today with a daughter. (Still keeping the green as an indoor only kite.) She was sad at first with the light wind and said she preferred quads, but after an hour she was more confident than ever. There were a few times the breeze would not support her kite the way she flew, but on 40 foot lines I had a blast. I have had spars pop out with breezes around 10 MPH and after hard landings, but so far everything is still intact. It seems far less fragile than it felt before.
  6. I know you can wind up from the handles to the kite on a winder, but it is usually done in a hurry without disconnecting from the kite. I've seen it done to clear the field in a hurry without staking down. I have not done it, heard it called the red bull windup, but it might work in the situation.
  7. I keep waiting to post on this hoping for an amazing suggestion. Here are my few cents, nothing amazing. I occasionally try to fly on the rooftop level of my office parking tower. I set up in the relative calm in the back of the SUV. I loop the two top lines next to the handles on the car, then unwind the lines. I will catch / throw after that. When winding up I also hook it back on the car to hold the handles. I also apply two layers of masking tape to the leading edge which gets a little torn up, but is disposable. I avoid any type of ground sliding, and even avoid wingtip action with aluminum endcaps apart from a single solid landing. Concrete parking lots are textured to a rough surface great for traction, horrible for kites.
  8. Agreed. He teaches it along with his "snap spin" done exclusively with the wrists and done quickly. That motion will always cause a drop, with a greater drop the slower you do it. I tried working through his steps, but on level four threw it away. Joe did a great thing as a designer 35 years ago and was a great pilot, still good at it, but his skill is better as a salesman than an instructor. Collectively we need more educational training, and step by step is good, but those instructions are lacking. The bicycle is a continuous transition. You need to be comfortable holding the kite in any orientation, and then learn to transition between them. The bicycle turn can then be taken as slowly as you want, transitioning from one hovering orientation to the next. It is more like pedaling and bike which I believe is where the name comes from. Just like pedals require large motion in knees and hips, slow bicycle turns require motion in shoulders and elbows. At the left facing and right facing direction one arm should be drawn back and the other extended. For me in most wind the upper side is drawn back near my elbow or even behind it, then pushed back out and on the other end of rotation, my opposite hand is back by the elbow. Done slowly it is a big body motion. Done quickly it might be a small distance back to the wrist or forearm, but certainly is not the twist of the wrist the video describes. Just watched that clip again and shuddered at at. Calls it "multispins", done entirely with the wrist, stating you do an aggressive 3/4 spin and let momentum carry it through the turn. He also says the motion requires strong wind and needs a vertical pop to stay up (0:30, and 0:55) warning if you don't have both strong winds and a quick pop to stay up it will fall. I also noticed he mostly shows his hands but doesn't show the kite. In the few moments he does show the kite, 0:40-0:41, 0:48-0:50, and 1:03-1:05 there is a SIGNIFICANT drop in the air. He describes it as doing the spins QUICKLY and relying on momentum to keep the kite up, then correcting to recover and regain altitude. Here is an old (free) article with a video near the bottom, notice the arm motion is fully to the elbow in order to maintain height at the left-facing and right-facing positions. And here is the (paid) tutorial from this site, that breaks it down in turns of hover to hover to hover, again showing large motion of the arms. In contrast, all these instructions say to go SLOWLY, as slow as you need, to maintain a solid hover at every position. Instead of using speed and momentum to rush through, they recommend first mastering a hover in any direction. Own your hover.
  9. Agreed. In good winds you can fly a quad easily from a beach chair. Dual lines can be flown from one spot only if you are doing little more than steering. The moment you want anything more advanced it becomes athletic with legs involved. Speed control on dual line, and slack line techniques on any kite, both require leg work. On dual line whether you are doing a two point landing or a series of acrobatic tricks, the footwork ranges from a slow dance to a rapid sprint.
  10. That's because active pilots don't generally sell their gear. It happens sometimes, which is what gets posted here. Most sales of good gear are people getting out of flying and want it to go where it will be used, but only after trying to get it to people they personally know who want to fly. When they are posted they are often snapped up quickly. Often it is easier to find listings on social media, local sales boards like Craigslist, and general sites like eBay, from people who inherent a bunch of good kites and don't know what else to do with them. Often they sell them as a group, like a bundle of 15 kites from the 1980s or 1990s with minimal description or photos. There's also people who only flew once and gave up, with a huge range of gear quality.
  11. That may be a terminal velocity for one condition, but terminal velocity is could be anything on a huge spectrum. The sail can potentially be in many orientations and conditions. Since you discount a glider option -- and a glider orientation can maintain a near-flat gliding profile, not 3-5 m/s -- you're describing where it could act as a parachute. But it could have fabric flapping around, and could even have winds and turbulence lift it temporarily into the air. On the flip side, it could be oriented to have practically no drag from air, cutting through the air like a falling stone. Why are you attempting all these calculations? I've done some of the math myself a few years ago for a simulator program, and my brother-in-law went into aeronautics and we've talked about it, and this is an area where nearly every equation includes a "fudge factor" which is experimentally obtained. At any moment a kite has a mixture of both laminar flow and turbulent flow, can range from almost zero profile to having a full surface profile, can range from a completely rigid body to a completely soft body, with portions behaving anywhere in between. And the conditions can change in an instant, a kite fully inflated behaving as a hard body with a narrow profile and laminar flow can depower and become a soft body tumbling with a variable profile and a highly turbulent flow, then it can catch the wind again and revert back to hard body, fixed profile, with a strong laminar flow. There are formulas giving approximations under a wide range of conditions, but most functions and engineering principles say the only way to know for certain is to try it experimentally.
  12. It has roots in Latin. You can buy both internal and external ferrules. Internal ferrules are like a dowel, a small stick inserted into both ends with one end typically glued/epoxied permanently. External ferrules are usually a metal sleeve, the rods slide inside with one end glued/epoxied permanently. There are pros and cons to each.
  13. As Dragonfish mentions, it seems you could be better served by a parafoil kite. No tubes and spars, and they can be folded or stuffed into a small bag. If you encounter people who would destroy your kites, a dual line kite if you're looking for activity would probably be better as it's easier (and less costly) to replace two lines rather than four. For ready-made kites, an HQ Symphony, Prism Synapse, Skydog First Foil, Cross Kites Air or Boarder, or maybe smaller with a Flying Wings Mighty Bug, and many store-specific variations which may have better availability in Brazil. They fold down small in a backpack, are lightweight, and are difficult to damage in a crash. They can still have lines cut or other damage by aggressive fliers, so you'll need to stay away from destructive people. If you're looking for more pull, HQ Rush, Prism Tantrum, or even a Prism Tensor or Elliot's Magma may be more your preference.There are many variations and store brands of these, as well, called power kites, traction kites, and trainer kites, they can produce tremendous pull if you're feeling vigorous or are in need of a demanding workout, or are considering kiteboarding, kitesurfing, or riding around on a kite-powered buggy. Larger designs really should be only flown over water due to the ability to lift people into the air, and those landings are harsh. Beware with these larger kites, they require more training and safety mindfulness as they increase in power. That is an option. Do you want to spend your days flying kites, or designing kites? Or if you have your heart set on a smaller frame kites, some kites have "travel frames" available. Rev 1.5 travel frames are about 40 cm long. If that works for you, many of the revolution 1.5 sized kites (Rev, Djinn, Phoenix, RevoPolo, etc) could work with modification if they don't sell travel frames. Basically the rods are cut in half, although it does affect the strength and flexibility. You could do the same with a dual line framed kite, although each joint introduces a weakness and changes how the frame flexes and bends.
  14. Yeah, the main danger tends to be what can damage, as opposed to what will happen. The worst case on can happen is pretty severe. The line snaps back at the full breaking strength near a person, who is then hit with a fast velocity whipping cord. The whip puts out an eye, or causes a severe lash. The kite happens to be in a position where it divebombs directly to the ground, striking someone with its full weight at 100 MPH or so. Or for a large kite, covers a crowd and gets them tangled up in many strings, like a fishing net over a crowd. The safest that can happen is minimal. The line snaps at a location far from the ground, and gently drifts to the ground. The kite itself is on a glide position and maintains it the entire time to a soft, gentle landing away from people, roads, or other obstructions. Most likely it will be on the safe end of the spectrum, but it cannot be guaranteed. Mistakes happen, and every year around the globe there are deaths related to kites. Statistically they are safe, but there are real dangers. The video links show a few of the ideal and mid-case scenarios. I think the harshest on those videos was depowering from inversion while doing a vertical hover, where the leading edge fell like a vertical spear directly to the ground.
  15. Call ITW, as they were the primary distributor. They know which parts they require. Sometimes they have an updated part number or use a different brand or generic part as years have passed since the kite was introduced. As for the shaking and power loss, what else is happening during the event? How does the wind change? What is the environment? Turbulence? Edge of wind window or the power zone or somewhere in between?
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