If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Transponder article updated with Trig info
I tow with my transponder on and I'm hoping this will protect me and my tow plane from a Boulder type scenario. Your thoughts appreciated, JJ Errrrr, that is assuming the hitter has asked for flight following or has some kind of collision avoidance equipment. Thanks, JJ |
#12
|
|||
|
|||
Transponder article updated with Trig info
On Feb 12, 8:10*am, Bob wrote:
Somehow we all need to get transponders in our gliders. Bob Lobby for stimulus money. |
#13
|
|||
|
|||
Transponder article updated with Trig info
On Feb 12, 8:24*am, JJ Sinclair wrote:
I tow with my transponder on and I'm hoping this will protect me and my tow plane from a Boulder type scenario. Your thoughts appreciated, JJ Errrrr, that is assuming the hitter has asked for flight following or has some kind of collision avoidance equipment. Thanks, JJ Barging in on Eric's reply with another long winded post... If the threat aircraft you are worried about are on flight following (i.e. they have a transponder and can be seen on radar by ATC and have bothered to actually contact ATC for flight following) then by definition you are both likely to be in radar coverage and ATC should be able to provide traffic advisories under flight following. Of course that or anything else here is no guarantee of protection. Of course, especially down low where tow planes often are, many aircraft are not under flight following. The other part of the question is "some kind of collision avoidance equipment". So watcha thinking? PCAS? - See my previous post for a warm up. Mode S TIS? - requires both aircraft to be within coverage of a radar with TIS support. Low level coverage (where many tow planes spend a lot of time) may not be good depending on your proximity to the terminal radar. e.g. out of where JJ and I fly NORCAL approach radar out of Sacramanto has TIS support, Reno approach does not. Threat aircraft with TIS should see us on those of us with transponders on those long mountain tows but will have problems down low. TCAD/TAS (e.g. L3 Skywatch or Garmin 800 series)/TCAS (jets airliners etc.)? - should provide pretty good visibility of you, independent of ground radar or any other ground infrastructure. Prices start $10k- $20k for GA aircraft, so more something you find in newer aircraft. Pretty impressive stuff but it still has limits. ADS-B? - won't see you at all because there is no ADS-B ground infrastructure where you fly yet (CA/NV) and few aircraft have ADS-B. Once there is ADS-B ground infrastructure then ADS-R will relay your SSR/transponder position to ADS-B receiver equipped aircraft. If the radar can't see you the ADS-B equipped aircraft won't know about you. The answer there is eventually you would add an ADS-B transmitter. e.g. a Mode S transponder like the Trig TT21 with ADS-B over 1090ES or in future a UAT transmitter/transceiver when suitable models become available. The ADS-B part of the transponder operates independently of ground Radar coverage. But one (USA unique) problem there is you will need to be within coverage of an ADS-B ground station for ADS-R so that your 1090ES ADS-B is retransmitted for folks with ADS-B UAT receivers and visa-versa. But eventually that ground station coverage is going to be pretty impressive, way more than SSR, but still it's an issue to be aware of. ADS-B is also capable of ultimately offering other advantages (much better long range traffic awareness/tracking, much better tracking usable for SAR, possibly ground based monitoring by FBOs, clubs, contest tracking etc.). This ADS-B future is one reason that if I was buying a transponder today it would likely be a Mode S capable of 1090ES. Which in the USA effectively currently means it would be a Trig TT21. FLARM? - won't see your transponder and effectively no GA aircraft in the USA are FLARM equipped and I suspect relatively few ever would be. If you are only concerned about glider-glider and towplane-glider separation then FLARM is a wonderful approach but the USA never got the start on FLARM when it should have and now ADS-B is coming which is going to confuse this picture (and given what is happening adopting FLARM instead of ADS-B in many places might be bad idea). But and it is a big but -- products like PowerFLARM and TRX-1090 that combine a FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very impressive on paper and I expect/hope to see them being used in the USA. And to the above add some generic issues, like - - Pilot training/knowledge (transponder turned on, in ALT mode? traffic awareness system turned on and the pilot known how to use it, etc.). - Lots of gliders in gaggles etc. may confuse a traffic awareness system and/or the pilot - Other non-transponder equipped aircraft in close proximity may be in somewhat increased danger if aircraft are avoiding the transponder equipped targets, - etc. etc. So while the question was about transponders in the glider and traffic awareness systems in the threat aircraft, overall the matter is working out which technology amongst things like transponders, ADS-B transmitters and/or receivers, PCAS, powerFLARM type devices, etc. make most sense for a particular situation/risk assumptions. Just a semantic niggle but I prefer to say things like "provide or help with traffic awareness" vs. "provide protection". But I know I slip on this all the time as well. Oh and I don't want anybody to get the wrong impression that technology cannot provide a hugely important help here and the limitations like I mentioned in this thread means it is not worth using. Human eyesight is easily fooled, visibility of threats is easily reduced or obstructed etc. These technologies are really useful, I just want people to think about the different choices and their benefits and limitations and select the best technology to help improve their flight safety. Darryl |
#14
|
|||
|
|||
Transponder article updated with Trig info
On Feb 12, 1:47*pm, Darryl Ramm wrote:
FLARM? - won't see your transponder and effectively no GA aircraft in the USA are FLARM equipped and I suspect relatively few ever would be. If you are only concerned *about glider-glider and towplane-glider separation then FLARM is a wonderful approach but the USA never got the start on FLARM when it should have and now ADS-B is coming which is going to confuse this picture (and given what is happening adopting FLARM instead of ADS-B in many places might be bad idea). But and it is a big but -- products like PowerFLARM and TRX-1090 that combine a FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very impressive on paper and I expect/hope to see them being used in the USA. Just to clarify Darryl's point: The FLARM unit to be offered in USA is PowerFLARM, and they expect most people will opt for the ADS-B receiver option. The ADS-B option listens to direct transponder transmissions, mode C or mode S, and also TIS-B ground-stations (which will exist someday we hear). Thanks Darryl ! Best Regards, Dave |
#15
|
|||
|
|||
Transponder article updated with Trig info
There was a recent report in the UK press that UAVs will be permitted to
fly in Class G airspace once they are capable of autonomous collision avoidance, and that the technology they were looking at was FLARM. I'm sure we Brits (will) buy our UAVs from the US - might this mean that the US military is also trialling FLARM? Dave Nadler wrote: On Feb 12, 1:47 pm, Darryl Ramm wrote: FLARM? - won't see your transponder and effectively no GA aircraft in the USA are FLARM equipped and I suspect relatively few ever would be. If you are only concerned about glider-glider and towplane-glider separation then FLARM is a wonderful approach but the USA never got the start on FLARM when it should have and now ADS-B is coming which is going to confuse this picture (and given what is happening adopting FLARM instead of ADS-B in many places might be bad idea). But and it is a big but -- products like PowerFLARM and TRX-1090 that combine a FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very impressive on paper and I expect/hope to see them being used in the USA. Just to clarify Darryl's point: The FLARM unit to be offered in USA is PowerFLARM, and they expect most people will opt for the ADS-B receiver option. The ADS-B option listens to direct transponder transmissions, mode C or mode S, and also TIS-B ground-stations (which will exist someday we hear). Thanks Darryl ! Best Regards, Dave |
#16
|
|||
|
|||
Transponder article updated with Trig info
On Feb 12, 12:05*pm, Chris Reed wrote:
There was a recent report in the UK press that UAVs will be permitted to fly in Class G airspace once they are capable of autonomous collision avoidance, and that the technology they were looking at was FLARM. I'm sure we Brits (will) buy our UAVs from the US - might this mean that the US military is also trialling FLARM? Dave Nadler wrote: On Feb 12, 1:47 pm, Darryl Ramm wrote: FLARM? - won't see your transponder and effectively no GA aircraft in the USA are FLARM equipped and I suspect relatively few ever would be. If you are only concerned *about glider-glider and towplane-glider separation then FLARM is a wonderful approach but the USA never got the start on FLARM when it should have and now ADS-B is coming which is going to confuse this picture (and given what is happening adopting FLARM instead of ADS-B in many places might be bad idea). But and it is a big but -- products like PowerFLARM and TRX-1090 that combine a FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very impressive on paper and I expect/hope to see them being used in the USA. Just to clarify Darryl's point: The FLARM unit to be offered in USA is PowerFLARM, and they expect most people will opt for the ADS-B receiver option. The ADS-B option listens to direct transponder transmissions, mode C or mode S, and also TIS-B ground-stations (which will exist someday we hear). Thanks Darryl ! Best Regards, Dave Unlikely. I think you will find that for the USA ADS-B UAT (and to a lesser extend at the low-end 1090ES) is the twinkle in the eye of the US military, defense/aerospace contractors, DHS and various police forces excited about UAVs. ADS-B is much more capable of things like extensive remote tracking, integration with ATC systems, etc. that Flarm does not try to do. As for looking at Flarm as an interesting early practical implementation of an automatic broadcast system I expect many military/defense contractor types are aware of it. Darryl |
#17
|
|||
|
|||
Transponder article updated with Trig info
On Feb 12, 10:47*am, Darryl Ramm wrote:
On Feb 12, 8:24*am, JJ Sinclair wrote: I tow with my transponder on and I'm hoping this will protect me and my tow plane from a Boulder type scenario. Your thoughts appreciated, JJ Errrrr, that is assuming the hitter has asked for flight following or has some kind of collision avoidance equipment. Thanks, JJ Barging in on Eric's reply with another long winded post... If the threat aircraft you are worried about are on flight following (i.e. they have a transponder and can be seen on radar by ATC and have bothered to actually contact ATC for flight following) then by definition you are both likely to be in radar coverage and ATC should be able to provide traffic advisories under flight following. Of course that or anything else here is no guarantee of protection. Of course, especially down low where tow planes often are, many aircraft are not under flight following. The other part of the question is "some kind of collision avoidance equipment". So watcha thinking? PCAS? - See my previous post for a warm up. Mode S TIS? - requires both aircraft to be within coverage of a radar with TIS support. Low level coverage (where many tow planes spend a lot of time) may not be good depending on your proximity to the terminal radar. e.g. out of where JJ and I fly NORCAL approach radar out of Sacramanto has TIS support, Reno approach does not. Threat aircraft with TIS should see us on those of us with transponders on those long mountain tows but will have problems down low. TCAD/TAS (e.g. L3 Skywatch or Garmin 800 series)/TCAS (jets airliners etc.)? - should provide pretty good visibility of you, independent of ground radar or any other ground infrastructure. Prices start $10k- $20k for GA aircraft, so more something you find in newer aircraft. Pretty impressive stuff but it still has limits. ADS-B? - won't see you at all because there is no ADS-B ground infrastructure where you fly yet (CA/NV) and few aircraft have ADS-B. Once there is ADS-B ground infrastructure then ADS-R will relay your SSR/transponder position to ADS-B receiver equipped aircraft. If the radar can't see you the ADS-B equipped aircraft won't know about you. The answer there is eventually you would add an ADS-B transmitter. e.g. a Mode S transponder like the Trig TT21 with ADS-B over 1090ES or in future a UAT transmitter/transceiver when suitable models become available. The ADS-B part of the transponder operates independently of ground Radar coverage. But one (USA unique) problem there is you will need to be within coverage of an ADS-B ground station for ADS-R so that your 1090ES ADS-B is retransmitted for folks with ADS-B UAT receivers and visa-versa. But eventually that ground station coverage is going to be pretty impressive, way more than SSR, but still it's an issue to be aware of. ADS-B is also capable of ultimately offering other advantages (much better long range traffic awareness/tracking, much better tracking usable for SAR, possibly ground based monitoring by FBOs, clubs, contest tracking etc.). This ADS-B future is one reason that if I was buying a transponder today it would likely be a Mode S capable of 1090ES. Which in the USA effectively currently means it would be a Trig TT21. FLARM? - won't see your transponder and effectively no GA aircraft in the USA are FLARM equipped and I suspect relatively few ever would be. If you are only concerned *about glider-glider and towplane-glider separation then FLARM is a wonderful approach but the USA never got the start on FLARM when it should have and now ADS-B is coming which is going to confuse this picture (and given what is happening adopting FLARM instead of ADS-B in many places might be bad idea). But and it is a big but -- products like PowerFLARM and TRX-1090 that combine a FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very impressive on paper and I expect/hope to see them being used in the USA. And to the above add some generic issues, like - - Pilot training/knowledge (transponder turned on, in ALT mode? traffic awareness system turned on and the pilot known how to use it, etc.). - Lots of gliders in gaggles etc. may confuse a traffic awareness system and/or the pilot - Other non-transponder equipped aircraft in close proximity may be in somewhat increased danger if aircraft are avoiding the transponder equipped targets, - etc. etc. So while the question was about transponders in the glider and traffic awareness systems in the threat aircraft, overall the matter is working out which technology amongst things like transponders, ADS-B transmitters and/or receivers, PCAS, powerFLARM type devices, etc. make most sense for a particular situation/risk assumptions. Just a semantic niggle but I prefer to say things like "provide or help with traffic awareness" vs. "provide protection". But I know I slip on this all the time as well. Oh and I don't want anybody to get the wrong impression that technology cannot provide a hugely important help here and the limitations like I mentioned in this thread means it is not worth using. Human eyesight is easily fooled, visibility of threats is easily reduced or obstructed etc. These technologies are really useful, I just want people to think about the different choices and their benefits and limitations and select the best technology to help improve their flight safety. Darryl Well, that's comforting, I think? Guess I'll keep my mark-1 eyeball greased up. You know I (we) almost hit a glider while on tow at Montague at 1500 feet. I saw him and figured he was a good mile away when suddenly he was right on us! The tow pilot kicked right rudder as he passed and then he was headed straight for my left wing. I rolled 90 degrees left and he missed me by maybe 5 feet! The RC sailplane guys were having their nationals and we almost hit a 12 foot white sailpland model. Seems our tow route took us past their first turn point about 5 miles north on Montague. Turn on the radio and use it! Turn on the Transponder and talk to center when necessary.........we do that a lot around Reno. Turn on the PCAS and monitor it. Keep your head on a swivel..........outside the cockpit. Cheers, JJ |
#18
|
|||
|
|||
Transponder article updated with Trig info
JJ Sinclair wrote:
Eric, I tow with my transponder on and I'm hoping this will protect me and my tow plane from a Boulder type scenario. Your thoughts appreciated, JJ It could help, if you are towing where radar can reach you, and the other aircraft has a PCAS or has flight following from ATC. If radar does reach you, then having your own PCAS will help, too. It _will_ help if a TCAS equipped aircraft approaches, because they don't need radar or ATC contact for TCAS to work. It might be appropriate to inform the local Approach people when you begin towing, so they can pass on the info to pilots they talk to. -- Eric Greenwell - Washington State, USA (netto to net to email me) - "Transponders in Sailplanes - Jan/2010" also ADS-B, PCAS, Flarm tinyurl.com/yg76qo9 - "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what you need to know tinyurl.com/yfs7tnz |
#19
|
|||
|
|||
Transponder article updated with Trig info
Frank Whiteley wrote:
On Feb 12, 8:10 am, Bob wrote: Somehow we all need to get transponders in our gliders. Bob Lobby for stimulus money. It worked for New Zealand. About 10 years ago, they got transponders in every glider because the government bought them for the gliders. The AOPA has made some proposals along that line for fitting ADS-B to GA aircraft. I have no idea if it's worth pursuing. NZ pilots, don't be bashful about correcting/adding details. -- Eric Greenwell - Washington State, USA (netto to net to email me) - "Transponders in Sailplanes - Jan/2010" also ADS-B, PCAS, Flarm tinyurl.com/yg76qo9 - "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what you need to know tinyurl.com/yfs7tnz |
#20
|
|||
|
|||
Transponder article updated with Trig info
Well, that's comforting, I think? Guess I'll keep my mark-1 eyeball greased up. You know I (we) almost hit a glider while on tow at Montague at 1500 feet. I saw him and figured he was a good mile away when suddenly he was right on us! The tow pilot kicked right rudder as he passed and then he was headed straight for my left wing. I rolled 90 degrees left and he missed me by maybe 5 feet! The RC sailplane guys were having their nationals and we almost hit a 12 foot white sailpland model. Seems our tow route took us past their first turn point about 5 miles north on Montague. Turn on the radio and use it! Turn on the Transponder and talk to center when necessary.........we do that a lot around Reno. Turn on the PCAS and monitor it. Keep your head on a swivel..........outside the cockpit. Cheers, JJ I guess that means read the NOTAMs also. We have large amateur rocket activity a few miles east of our glider port at times. Frank Whiteley |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
New Trig TT22 Transponder | Paul Remde | Soaring | 1 | January 14th 10 07:27 PM |
TRIG TT21NOW IN STOCK | Tim Mara[_2_] | Soaring | 5 | September 29th 09 10:29 PM |
Trig TT21 Transponder receives FAA TSO approval | Paul Remde | Soaring | 12 | September 19th 09 02:47 PM |
Trig TT21 Transponder Thoughts? | jcarlyle | Soaring | 16 | June 23rd 09 04:38 PM |
Seeking KT-79 transponder install/operational info | [email protected] | Owning | 7 | July 26th 06 01:11 PM |