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#12
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How about the original Mark One Eyeball - most folk
have two inbuilt units and they provide a damn sure fire way to avoid a collision. LOOKOUT! Gav At 10:48 19 October 2003, Thierry wrote: Hello, At 13.8v the ProXalert R5 device needs only ONE watt compared to nearly 5 watts for the Trafficscope(c). It displays up to three threats including squawk, altitude and distance. It also features a built in altitude alerter. It will be available mid November. See our Website www.proxalert.com Have safe flight, Regards, 'John Morgan' wrote in message news:... 'Eric Greenwell' wrote in message http://www.ryan-tcad.com/products/traffic_9900B.html It's the only TCAD system I'm aware of. Eric ('n all), There's also 'Skywatch', I think by BF Goodrich. Same problem though, expensive and consumes too much power for a glider. What would be *really* good is if they came out with a portable ADS-B for cheap! But since that won't happen soon - or ever, the only game left I'm aware of is passive transponder detectors . . . and these have gotten mixed reviews until just recently. The following is cut from a post on the Mooney tech group: 'Just got my TrafficScope TPAS VRX from Surecheck last week and had a chance to fly with it. Absolutely a first-rate product!!! Much, much better/different than the earlier TPAS RX-110 version. http://www.surecheck.net . . .' The problem with previous passive detectors is they were based on signal strength only, no bearing or altitude info. That, and some users experienced a lot of falses. The new version mentioned above still doesn't give bearing, but it *does* give altitude of the target and since it decodes this info, can eliminate much of the falsing, alerts from overhead airliners etc. I have no connection with the above company and don't have one of these things to play with - yet. At $1200 . . . figured I'd wait some until there are more happy customers. -- bumper - ZZ 'Dare to be different . . . circle in sink.' to reply, the last half is right to left --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 10/9/2003 |
#13
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![]() "Gavin Goudie" wrote in message ... How about the original Mark One Eyeball - most folk have two inbuilt units and they provide a damn sure fire way to avoid a collision. LOOKOUT! Gav "Damn sure fire way to avoid a collision" might be true if they were only hooked up to something with a better processor than the Mark One Brain. Even so, they can only cover a relatively small portion of the potential threat area at a time as they are the predator, forward looking binocular vision version (instead of the more preferred, side-mounted prey version). From the accident stats, "see and avoid" and "big sky principal" are anything but damn sure. "LOOKOUT!" is good advice, the best tool we all have, but it ain't the be-all-end-all . . . if it were, deer wouldn't need ears. -- bumper - ZZ "Dare to be different . . . circle in sink." to reply, the last half is right to left --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.525 / Virus Database: 322 - Release Date: 10/9/2003 |
#14
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#15
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Gavin Goudie wrote in message ...
How about the original Mark One Eyeball - most folk have two inbuilt units and they provide a damn sure fire way to avoid a collision. LOOKOUT! Gav Most of the time, the Mk 1 Mod 0 Eyeball works fine - IF you can look in the direction of the threat. Fine during thermalling (plus you are easy to see, assuming the other guy is also looking out...). But during long glides between thermals, you CANNOT SEE the threat running you down from behind. I would love to have a traffic warning device - and a transponder - but havn't found anything yet that I can afford (yet). Then there is the problem of all the neat gadgets in the cockpit now: Glide computers, PDA's with moving maps, handheld GPS's. Real easy to spend way too much time heads down; so the admonition to LOOKOUT! is still absolutely valid! I guess a lot depends on where, what, and how you fly. Hanging around the gliderport in the house thermal, the biggest threat is the student in the same thermal staring at his variometer. Flying XC in the western US (or Oz, etc) my biggest fear is some doctor in his Baron hitting me from behind. Of course, as long as I keep my cruise speed up, I can eliminate the threat from most Cessnas and Pipers! Kirk LS6-b "66" |
#16
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"Jim Kellett" wrote in message et...
Just curious - anyone ever heard of a US glider with a TCAD (such as Ryan's 8800 Gold) installed? Love to get a "user's report" if so . . . Jim Kellett, Resident Curmudgeon Chief Flight Instructor, Skyline Soaring Club Captain and CFI(G), Civil Air Patrol Chairman, Classic Division, Vintage Sailplane Association Webmaster, Open Cirrus Website "If Flying Were the Language of Man, Soaring Would be its Poetry" Having used a Ryan TCAD for a few years, then upgrading to TCAS, I would say that TCAD is not very reliable. Rather than looking at the display, wondering where the target really is, better to be looking out the window. If you're anywhere near busy airspace, the display will get very cluttered & hard to interpret, and your head is down & locked while you look. Never tried thermalling with one, but im sure it would be useless while circling. I still remember the guy in the 102 at Truckee who got knocked from the sky by an Aerostar (I think) who just departed & was head down & locked programming his GPS. The glider pilot lived in spite of not wearing a chute. WIthout transponders, nobody else can see gliders, & lots of em (Al)are flying around looking at their...PDA/L-nav/S-nav/varios/GPS/MP3/etc. ad-nauseum. Turn it all off & look out the window! My o2 cents worth. -Dan |
#17
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Kirk Stant wrote:
... Most of the time, the Mk 1 Mod 0 Eyeball works fine - IF you can look in the direction of the threat. Fine during thermalling (plus you are easy to see, assuming the other guy is also looking out...). But during long glides between thermals, you CANNOT SEE the threat running you down from behind. ... Yes, I remember a huge glider (well, only 15 m, but so close it seemed really huge) coming just above my head during such a glide, because it left the same slope as myself just a few seconds after me, just a few meters higher and flew just a little faster than me. None of us could see the other glider just up to this moment. But there is a simple device that could help in this case, which is fitted in most motor gliders with a retracting prop: a small rear facing mirror. I wonder why we don't have such a mirror on every glider. |
#18
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At Proxalert our TCAD definition is : See what you can't see.
Once properly set you simply forget it until the unit will alert you someone is around close to your altitude. Our device extract the threat altitude from the threat reply. Our unit also provide a tendancy information (threat climbing, descending from below or above your own altitude). I agree previous generation affordable device were unable to filter out traffic flying 20,000 ft above. This is no more the case. Obviously no TCAD, TCAS or even sharp eyes will ever be 100% sure. So sometime this little percentage these devices add will help save your and other lifes. Furthermore as most gliders don't 'wear' any transponder nobody see you and the collision risk is even higher. Expensive : Assuming a 1000 hours life span it will add a dollar (Our beer back earth ![]() Regards Terry See us at www.proxalert.com (Buck Wild) wrote in message . com... "Jim Kellett" wrote in message et... Just curious - anyone ever heard of a US glider with a TCAD (such as Ryan's 8800 Gold) installed? Love to get a "user's report" if so . . . Jim Kellett, Resident Curmudgeon Chief Flight Instructor, Skyline Soaring Club Captain and CFI(G), Civil Air Patrol Chairman, Classic Division, Vintage Sailplane Association Webmaster, Open Cirrus Website "If Flying Were the Language of Man, Soaring Would be its Poetry" Having used a Ryan TCAD for a few years, then upgrading to TCAS, I would say that TCAD is not very reliable. Rather than looking at the display, wondering where the target really is, better to be looking out the window. If you're anywhere near busy airspace, the display will get very cluttered & hard to interpret, and your head is down & locked while you look. Never tried thermalling with one, but im sure it would be useless while circling. I still remember the guy in the 102 at Truckee who got knocked from the sky by an Aerostar (I think) who just departed & was head down & locked programming his GPS. The glider pilot lived in spite of not wearing a chute. WIthout transponders, nobody else can see gliders, & lots of em (Al)are flying around looking at their...PDA/L-nav/S-nav/varios/GPS/MP3/etc. ad-nauseum. Turn it all off & look out the window! My o2 cents worth. -Dan |
#19
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#20
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"Kirk Stant" wrote in message
om... Most of the time, the Mk 1 Mod 0 Eyeball works fine - IF you can look in the direction of the threat. Fine during thermalling (plus you are easy to see, assuming the other guy is also looking out...). . . . __________________________________________________ __________________________ ________ Some background on the original question . . . Between 1982 and 2003, there were, according to the NTSB, ca. 400 MACs in the United States, of which 18 involved gliders, of which 10 - count'em - ten - were glider/glider in a thermal!* There were others that were not reported.** Two more were glider/glider in the pattern. We're not doing such a good job of see-and-avoid even in the situation(s) where see-and-avoid is the ONLY practical way to avoid a MAC. B U T . . . . The ORIGINAL question, about TPAS/TCAD, was focussed on trying to get a better grip on the risk of MACs which are not all that obvious from the historical record, but which loom menacingly over the horizon - e.g., with an airliner (TCAS equipped) or other large (transponder equipped) airplane (or, in the latter case, maybe even a glider). These are instances where see-and-avoid is not really working and is not going to work (e.g., the airliner coming up on your six, which HAS led to NMACs.). There's a growing list of anecdotally reported MACs between airliners and/or military aircraft and gliders. So, anyone know of a pilot who's actually installed or used a TCAD unit in a glider? (Or a TPAS, for that matter . . .) Jim Kellett, Resident Curmudgeon Chief Flight Instructor, Skyline Soaring Club Captain and CFI(G), Civil Air Patrol Chairman, Classic Division, Vintage Sailplane Association Webmaster, Open Cirrus Website "If Flying Were the Language of Man, Soaring Would be its Poetry" * Query on the downloaded NTSB accident database. ** Personal communication |
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