Date: Sun, 21 Nov 1993 16:06:38 -1000 From: jbenedict@law.fordham.edu (Jason Benedict) Message-Id: <1993Nov22.021337.27723@das.harvard.edu> Organization: Division of Applied Sciences, Harvard University Subject: 360 degree slides ?? Steve, I have done (in the exhilarating past) a few 360 flights in my time. In addition, a few 180 degree side slides. So I must ask, when you run a 360 you tend to give the kite lift. he premise of a side slide is a controlled stall, right ? A stall that is given the momentum from the edge that generates enough lift to maintain hieght, but yet no lift. When you run the circle, how do you stop the kite from gaining the lift and rising out of the stall ? I agree that it is obbviously easier in an indoor environment, but I fly my 360's and slides outdooors. Slides in any wind, and 360's in winds less than 2-3MPH. Anything I should incorporate when I try a 360 slide ? Jason = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Date: Mon, 22 Nov 1993 12:03:59 -1000 From: sasaki@das.harvard.edu (Marty Sasaki) Message-Id: <1993Nov22.220359.8463@das.harvard.edu> Organization: Harvard University Subject: Re: 360 degree slides ?? In article <1993Nov22.021337.27723@das.harvard.edu>, jbenedict@law.fordham.edu (Jason Benedict) writes: > I have done (in the exhilarating past) a few 360 flights in my time. >In addition, a few 180 degree side slides. So I must ask, when you run a 360 >you tend to give the kite lift. he premise of a side slide is a controlled >stall, right ? A stall that is given the momentum from the edge that generates >enough lift to maintain hieght, but yet no lift. A side slide (skate, helicopter slide, etc.) is a balancing act. There is a force vector pointing up (counteracts gravity), but it matches gravity exactly, otherwise the kite wouldn't stay at the same height. At the same time there is a side force that causes the kite to slide horizontally. In light wind, you often have to move forward to keep the kite from going up, or you need to move slightly backward to keep the kite from sinking. > When you run the circle, how do you stop the kite from gaining the lift >and rising out of the stall ? I agree that it is obbviously easier >in an indoor environment, but I fly my 360's and slides outdooors. >Slides in any wind, and 360's in winds less than 2-3MPH. So, let's assume that it takes .5 mph to keep the kite off of the ground and you are flying in a 1.0 mph wind. Directly down wind, you need to be moving downwind at .5, any more and the kite would sink to the ground, any more and the kite would rise. When the kite is directly upwind, you need to be running downwind at 1.5, again, any more would cause the kie to rise, any less would cause it to sink to the ground. > Anything I should incorporate when I try a 360 slide ? I watched Steve Thomas flying on the beach at Seaside in wind that topped out at maybe 1 mph. I saw him fly a slide around 180 degrees, an axel into straight up and over and down the other side with an (original?) axel while diving down and back into a slide. I guess you could try to do that! ;-) -- Marty Sasaki Harvard University Sasaki Kite Fabrications sasaki@noc.harvard.edu Network Services Division 26 Green Street 617-496-4320 10 Ware Street Jamaica Plain, MA 02130 Cambridge, MA 02138-4002 phone/fax: 617-522-8546 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Date: Mon, 22 Nov 1993 11:52:33 -1000 From: steveth@netcom.com (Steve Thomas) Message-Id: Organization: VisionAire, San Francisco, CA Subject: Re: 360 degree slides ?? In article <1993Nov22.021337.27723@das.harvard.edu> jbenedict@law.fordham.edu (Jason Benedict) writes: >Steve, > I have done (in the exhilarating past) a few 360 flights in my time. >In addition, a few 180 degree side slides. So I must ask, when you run a 360 >you tend to give the kite lift. he premise of a side slide is a controlled >stall, right ? A stall that is given the momentum from the edge that generates >enough lift to maintain hieght, but yet no lift. > When you run the circle, how do you stop the kite from gaining the lift >and rising out of the stall ? I agree that it is obbviously easier in an indoor environment, but I fly my 360's and slides outdooors. Slides in any wind, and 360's in winds less than 2-3MPH. > Anything I should incorporate when I try a 360 slide ? Well, keep in mind that when I talk about doing a 360-anything, we're talking none to almost no wind. As such, a slide is suddenly a bit different--you're not really "stalling" the kite, since the kite is already in a "stalled", since it has no lift outside of the lift you give it by moving air around the sail. Now, when you go to do the slide slip in no wind, you need to create the sideways motion by pulling slightly more with one hand than the other. In addition, you also need to give the kite enough wind (by walking away >From the sail) to keep it a few feet in the air (the lower you are, the better it looks). It's a tricky combination of factors: keeping the kite aloft, providing sideways momentum, keeping steady while running backwards, etc. Also, a heavier kite is actually easier to do this with. I first did this move a couple of years ago with a really old kite called a "Phantom". A heavier kite will actually like to stay nose-up going sideways instead of flying that direction... In general, you should practice your side-slips in very light wind when just starting out... -- _______ Steve Thomas steveth@netcom.com "I'm doing just fine. I took stock in a Mace company right before society crumbled." -- Selma/Simpson's = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =