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#62
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On Sep 1, 1:02*am, Walt Connelly Walt.Connelly.
wrote: JJ Sinclair;739478 Wrote: I have felt for some time now that my back-pack parachute provides little more than a false sense of security..............I don't think I would ever get out of a spinning, tumbling ship. The BRS has been demonstrated to work as low as 260 feet during the FAA certification of the Cirrus. This could save you from a mid-air in the pattern or that all time biggest killer. stall/spin turning final. BRS also provides a way out of structural failures or pilot incapacitation. How about stuck low on the wrong side of the ridge with nothing but trees in all directions? The BRS descent rate is about like a normal parachute (like stepping off a 7' ledge). The Genesis installation calls for a 4-point bridle that attaches to all 4 lift fittings, this will result in *a wings- level, slight nose down attitude under the chuts. *Lowering the gear will absorb some of the landing forces. Flarm is great and I'd buy it in heartbeat if everybody had it. Lets not forget that 2 of the 4 mid-airs in the US last year involved a tow plane and some of them still don't even have radios, let alone transpponders, Pcas or Flarm. Bottom line is; We are all the chairman of our own safety committee and we must take the actions we believe to be the best course to keep us out of harms way. For me that includes installing a BRS. Cheers, JJ I have always felt that listening to those with greater experience than myself is one of the best safety devices. *Seems that today people spend more time flying with their heads inside the cockpit than outside. *With a parachute, BRS, FLARM, survival kit, bail out bottle, knife, gun, flares, medical kit, lunch, snacks, condoms and everything else one could carry in a glider, it's a wonder these things can get off the ground. As a relative newbie to the world of gliding, I have in my some 100 flight had two close calls. I consider myself a heads up kind of guy and try hard to keep my head on a swivel, my eyes wide open and paying attention. * I have asked a few local pilots why it seems that the preferred color for gliders appears to be white. *I understand that the sun might degrade a more brightly painted ship faster than a base white one. *Is this really true? *It would seem to me that the cheapest form of avoidance would be making ourselves more visible. * I am in the market for an older, aluminum ship and would consider painting it bright red if it would increase my visibility. * I understand that FLARM only works if the other guy has one. *I guess for the time being I will have to depend on my parachute and luck for survival, along with a healthy dose of paying attention. * Walt -- Walt Connelly There is a problem with darker colors on the majority of composite sailplanes. The darker colors get hotter by absorbing more heat in the sun, and at a certain temperature the glass/epoxy matrix will begin to loose its structural integrity. Look up T sub G. Go to your glider field in the midday sun and put your hand on a glass ship painted white, do the same on a red 1-26. Mike "0" |
#63
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On Sep 1, 12:02*am, Walt Connelly Walt.Connelly.
wrote: this really true? *It would seem to me that the cheapest form of avoidance would be making ourselves more visible. * I am in the market for an older, aluminum ship and would consider painting it bright red if it would increase my visibility. * The BGA did a study and bottom line is the only thing that really helps is adding highly reflective bits to leading and trailing edges. Bright colors and contrasting colors end up being worthless at anything but close range, is my understanding. -Tom |
#64
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On 9/4/2010 11:47 AM, 5Z wrote:
On Sep 1, 12:02 am, Walt ConnellyWalt.Connelly. wrote: this really true? It would seem to me that the cheapest form of avoidance would be making ourselves more visible. I am in the market for an older, aluminum ship and would consider painting it bright red if it would increase my visibility. The BGA did a study and bottom line is the only thing that really helps is adding highly reflective bits to leading and trailing edges. Bright colors and contrasting colors end up being worthless at anything but close range, is my understanding. -Tom One good test is worth a thousand considered opinions. But that's just my opinion... Seriously, I doubt there's any single color/device that is '100% visually "best".' The devil's in the details. F'r'example... Reflective tape is likely pretty ineffective unless in non-diffuse sunlight. Solid yellow is definitely better/more visible than many other primary colors I've seen on sailplanes under many lighting conditions...but virtually disappears in certain conditions of beneath-cloud shadow. Both observations true for distant sightings, too, at least with my eyes. In 'essentially solid color terms', dark orange is probably 2nd-best IMHO, with red less so. Blue and green not so good, though against certain backgrounds both can stand out. Shiny silver is mostly excellent camouflage. So anyone looking for a 'panacea visibility scheme' is likely doomed to disappointment...but anyone rationalizing 'white is as good as anything else' is (arguably) - and easily personally testable by keeping a good lookout in an environment of mixed sailplane colors - wrong. YMMV. Bob W. |
#65
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Bob Whelan wrote:
So anyone looking for a 'panacea visibility scheme' is likely doomed to disappointment... High intensity flashing beacon powered from a solar-charged battery? ;-) (Haven't checked to see if such a thing already exists.) |
#66
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As regards conspicuity colour schemes - there was a study some years
ago by (IIRC) the RAF that concluded that black was the colour that allowed earliest visual acquisition because it had the highest colour density. This is purely personal opinion but I think that there is a lot of confusion between "attention keeping" and "ease of visual acquisition" and I think that brightly coloured gliders are a positively bad thing. They tend to attract and keep other pilots attention - partly involuntarily and partly cognitively as you start to ponder what a nice bright glider it is and how well it stands out against the scenery, all the time reducing look out elsewhere. I discipline myself to look elsewhere when I see a coloured glider. I have never once thought that I have seen a coloured glider earlier than another white one flying next to it - even flying against a snowy backdrop. We have several RAF cadet scheme gliders at our site over the summers and they have large dayglow areas on the wings and reflective strips. I have been studying from the ground whether I can see them in the air any sooner than the similar white club gliders and I am completely unconvinced. Good lookout supplemented by Flarm are the best we have at present. John Galloway |
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