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Anti Collision Warning
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George Vranek wrote:
A low cost ACW based on GPS will be tested in Switzerland. See www.flarm.com George Numerous attempts were made in this domain. My brother proposed the design of a such device as a project for students working on a degree in electronics. Two members of my club designed and made a cheap system which in not an anti-collision device but just a position reporting system, but could easily converted into an anti- collison system. But the problem with all these attempts is to find an available radio frequency for the data transmission. The above cited device, according to the WEB page, uses a frequency in the "SRD-band". I don't know what it is, but the same page says that its usage is free ON THE GROUND. I doubt that the same will be true when used for air to air transmission, I am quite sure that in France at least this is forbidden, as for any frequency not explicitly allowed for air to air transmission. |
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Robert Ehrlich wrote in message ...
George Vranek wrote: A low cost ACW based on GPS will be tested in Switzerland. See www.flarm.com George Numerous attempts were made in this domain. My brother proposed the design of a such device as a project for students working on a degree in electronics. Two members of my club designed and made a cheap system which in not an anti-collision device but just a position reporting system, but could easily converted into an anti- collison system. But the problem with all these attempts is to find an available radio frequency for the data transmission. The above cited device, according to the WEB page, uses a frequency in the "SRD-band". I don't know what it is, but the same page says that its usage is free ON THE GROUND. I doubt that the same will be true when used for air to air transmission, I am quite sure that in France at least this is forbidden, as for any frequency not explicitly allowed for air to air transmission. This is true for almost anywhere in Europe. But the restrictions do not have technical reasons AFAIK. Therefor it should not be a real problem to get it legalised for this special purpose. Nowadays anything is possible if you just say the word "safety". The makers are pretty confident in this. Marcel Why walk when you can soar? |
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Marcel Duenner wrote:
... Therefor it should not be a real problem to get it legalised for this special purpose. Nowadays anything is possible if you just say the word "safety". It is a real problem. Laws are made by politicians, and politicians only care about voters. Soaring pilots are a such small minority of voters that politicians don't care about them. |
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I don't see the benefit of any anti collision systems where two pilots
already know that the other is nearby and #still# collide! Ian |
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On Tue, 27 Apr 2004 18:56:42 +0000 (UTC), "tango4"
wrote: I don't see the benefit of any anti collision systems where two pilots already know that the other is nearby and #still# collide! Ian Which is true of all the mid airs in gliders in Australia as far as I know. If they didn't specifically know about each other the pilots certainly had good reason to believe other gliders were around. Mike Borgelt |
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Robert Ehrlich wrote in message ...
Marcel Duenner wrote: ... Therefor it should not be a real problem to get it legalised for this special purpose. Nowadays anything is possible if you just say the word "safety". It is a real problem. Laws are made by politicians, and politicians only care about voters. Soaring pilots are a such small minority of voters that politicians don't care about them. Devices like this could also be used on GA aircrafts. Even polititions fly, and I'm sure they will be happy to know the plane they are on rely on GPS technology rather than a 40 years old radar technology. Hopefully one day these devices will replace transponders on ALL aircrafts and will be required on all aircrafts. Then the madness of mid airs will end. Ramy |
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"tango4" wrote in message ...
I don't see the benefit of any anti collision systems where two pilots already know that the other is nearby and #still# collide! Ian These devices should be capable to tell you if you are in a collision course, not just warn you of a nearby aircraft. Earlier someone posted a link to a new device which also calculate collision course while thermaling! If you thermal too close to someone else it should warn you. This is what we need. How many more midairs do we need to acknowledege this is a real problem and not just a rare thing like some still claim? Ramy |
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"Ramy Yanetz" wrote in message om... Robert Ehrlich wrote in message ... Hopefully one day these devices will replace transponders on ALL aircrafts and will be required on all aircrafts. Then the madness of mid airs will end. Ramy No it wont! More than half of the midairs recently involved aircraft where the pilots were flying together, knew that the other aircraft was there and *still* collided. All that anti collision systems would have added to these situations would have been a bit of total aircraft mass. The problem we currently have is that in spite of knowing that other aircraft are very close by pilots are getting it wrong and banging in to each other. We need to review - Thermal joining techniques Thermal leaving techniques co-thermaling practices co-operative flying practice. Read Paul Adriance's account of his accident earlier this month, it wasn't caused by GPS or any other form of instrumentation, weather or anything else and no form of instrumentation would have changed the outcome. The pilots simply lost situational awareness and in a few moments it all went very wrong. Ian |
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See my other reply below. These devices should be capable to warn you of
imminent collision even while thermaling, not just warn you of nearby aircraft. And if they currently don't, they will in the near future. It should not be too difficult to compute collision courses. Ramy "tango4" wrote in message ... "Ramy Yanetz" wrote in message om... Robert Ehrlich wrote in message ... Hopefully one day these devices will replace transponders on ALL aircrafts and will be required on all aircrafts. Then the madness of mid airs will end. Ramy No it wont! More than half of the midairs recently involved aircraft where the pilots were flying together, knew that the other aircraft was there and *still* collided. All that anti collision systems would have added to these situations would have been a bit of total aircraft mass. The problem we currently have is that in spite of knowing that other aircraft are very close by pilots are getting it wrong and banging in to each other. We need to review - Thermal joining techniques Thermal leaving techniques co-thermaling practices co-operative flying practice. Read Paul Adriance's account of his accident earlier this month, it wasn't caused by GPS or any other form of instrumentation, weather or anything else and no form of instrumentation would have changed the outcome. The pilots simply lost situational awareness and in a few moments it all went very wrong. Ian |
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