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#1
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
We've had to change tactics slightly to deal with the Cambridge flight recorder GPS date problems recently discussed here on r.a.s.
Here's the latest: Cambridge 302 needs a new GPS card to fix this the right way. Simply soldering in a new battery won't get your 302 through Winter storage (which is where *my* 302 vario is right now). Few people will want to remove a vario for the Winter to maintain the GPS date. This problem will be repaired under our existing CAI 302 flat rate policy: we fix (almost) any 302 and provide a 1 year warranty and fresh barograph calibration for $350. Cambridge model 10/20/25 flight recorders were always intended to be mounted in an easily removable fashion, so we feel that the battery only fix is better economy for these older units. CNi will replace the GPS date battery, fix your date problem and calibrate the barograph for $125. It will be up to you to maintain the battery by powering up the flight logger for a few hours every 3 months or you will lose the date... there will be a warning/reminder label on your returned unit to this effect. Gary Kammerer handles all of our CAI service, please find contact info for Gary on our website. Best regards and Good Soaring in 2015, Evan Ludeman for ClearNav Instruments www.ClearNav.net please join our forum for discussion of all things ClearNav http://clearnav.net/simplemachinesforum/index.php |
#2
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
At 19:48 11 December 2014, Tango Eight wrote:
We've had to change tactics slightly to deal with the Cambridge flight reco= rder GPS date problems recently discussed here on r.a.s. Here's the latest: Cambridge 302 needs a new GPS card to fix this the right way. Simply solde= ring in a new battery won't get your 302 through Winter storage (which is w= here *my* 302 vario is right now). Few people will want to remove a vario = for the Winter to maintain the GPS date. This problem will be repaired under our existing CAI 302 flat rate policy: = we fix (almost) any 302 and provide a 1 year warranty and fresh barograph c= alibration for $350. Cambridge model 10/20/25 flight recorders were always intended to be mounte= d in an easily removable fashion, so we feel that the battery only fix is b= etter economy for these older units. CNi will replace the GPS date battery= , fix your date problem and calibrate the barograph for $125. It will be u= p to you to maintain the battery by powering up the flight logger for a few= hours every 3 months or you will lose the date... there will be a warning/= reminder label on your returned unit to this effect. Gary Kammerer handles all of our CAI service, please find contact info for = Gary on our website. Best regards and Good Soaring in 2015, Evan Ludeman for ClearNav Instruments www.ClearNav.net please join our forum for discussion of all things ClearNav http://clearnav.net/simplemachinesforum/index.php With regards to the older Cambridge loggers ie model 25. Is it feasible to mod the logger such that the GPS internal real time clock is powered off the same user replaceable 3v higher capacity lithium battery that provides the loggers seal ? I was stupidly thinking of a wire and a low V drop diode ? (Would this mod mess up the GPS by injecting interference/noise into the screened receiver ?) |
#3
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Update on CAI flight recorder repairs from CNi (GPS Dateproblems)
On Fri, 12 Dec 2014 09:19:24 +0000, Ian Reekie wrote:
At 19:48 11 December 2014, Tango Eight wrote: We've had to change tactics slightly to deal with the Cambridge flight reco= rder GPS date problems recently discussed here on r.a.s. Here's the latest: Cambridge 302 needs a new GPS card to fix this the right way. Simply solde= ring in a new battery won't get your 302 through Winter storage (which is w= here *my* 302 vario is right now). Few people will want to remove a vario = for the Winter to maintain the GPS date. This problem will be repaired under our existing CAI 302 flat rate policy: = we fix (almost) any 302 and provide a 1 year warranty and fresh barograph c= alibration for $350. Cambridge model 10/20/25 flight recorders were always intended to be mounte= d in an easily removable fashion, so we feel that the battery only fix is b= etter economy for these older units. CNi will replace the GPS date battery= , fix your date problem and calibrate the barograph for $125. It will be u= p to you to maintain the battery by powering up the flight logger for a few= hours every 3 months or you will lose the date... there will be a warning/= reminder label on your returned unit to this effect. Gary Kammerer handles all of our CAI service, please find contact info for = Gary on our website. Best regards and Good Soaring in 2015, Evan Ludeman for ClearNav Instruments www.ClearNav.net please join our forum for discussion of all things ClearNav http://clearnav.net/simplemachinesforum/index.php With regards to the older Cambridge loggers ie model 25. Is it feasible to mod the logger such that the GPS internal real time clock is powered off the same user replaceable 3v higher capacity lithium battery that provides the loggers seal ? I was stupidly thinking of a wire and a low V drop diode ? (Would this mod mess up the GPS by injecting interference/noise into the screened receiver ?) There already is an aux power input for that battery at the interface, 4-35 volts, so obviously goes to a regulator. A better technical solution would be for the firmware to use a few bits of the non-volatile memory on board to prevent the time from going backwards, but that's not going to happen. Given that the old GPS-NAV models never have produced valid IGC files, I would expect the cost of trying to do hardware modifications would exceed any reasonable valuation of what they're currently worth. The brain damage of trying to get OLC to accept the files has to be figured in there somewhere. Similarly, the 302 has had chronic data corruption issues in the flash that were never fixed, so dropping $350+ today to swap out engines is really hard to justify. But there's credible information that the black- case models of those already have the newer engine, and may well be good for a number of additional years. -Dave |
#4
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
On Saturday, December 13, 2014 1:27:35 AM UTC+13, David Kinsell wrote:
On Fri, 12 Dec 2014 09:19:24 +0000, Ian Reekie wrote: At 19:48 11 December 2014, Tango Eight wrote: We've had to change tactics slightly to deal with the Cambridge flight reco= rder GPS date problems recently discussed here on r.a.s. Here's the latest: Cambridge 302 needs a new GPS card to fix this the right way. Simply solde= ring in a new battery won't get your 302 through Winter storage (which is w= here *my* 302 vario is right now). Few people will want to remove a vario = for the Winter to maintain the GPS date. This problem will be repaired under our existing CAI 302 flat rate policy: = we fix (almost) any 302 and provide a 1 year warranty and fresh barograph c= alibration for $350. Cambridge model 10/20/25 flight recorders were always intended to be mounte= d in an easily removable fashion, so we feel that the battery only fix is b= etter economy for these older units. CNi will replace the GPS date battery= , fix your date problem and calibrate the barograph for $125. It will be u= p to you to maintain the battery by powering up the flight logger for a few= hours every 3 months or you will lose the date... there will be a warning/= reminder label on your returned unit to this effect. Gary Kammerer handles all of our CAI service, please find contact info for = Gary on our website. Best regards and Good Soaring in 2015, Evan Ludeman for ClearNav Instruments www.ClearNav.net please join our forum for discussion of all things ClearNav http://clearnav.net/simplemachinesforum/index.php With regards to the older Cambridge loggers ie model 25. Is it feasible to mod the logger such that the GPS internal real time clock is powered off the same user replaceable 3v higher capacity lithium battery that provides the loggers seal ? I was stupidly thinking of a wire and a low V drop diode ? (Would this mod mess up the GPS by injecting interference/noise into the screened receiver ?) There already is an aux power input for that battery at the interface, 4-35 volts, so obviously goes to a regulator. A better technical solution would be for the firmware to use a few bits of the non-volatile memory on board to prevent the time from going backwards, but that's not going to happen. Given that the old GPS-NAV models never have produced valid IGC files, I would expect the cost of trying to do hardware modifications would exceed any reasonable valuation of what they're currently worth. The brain damage of trying to get OLC to accept the files has to be figured in there somewhere. Similarly, the 302 has had chronic data corruption issues in the flash that were never fixed, so dropping $350+ today to swap out engines is really hard to justify. But there's credible information that the black- case models of those already have the newer engine, and may well be good for a number of additional years. -Dave Is there an updated gps engine we can fit in the 302ddv to keep these units going as an fai logger? -Alan. |
#5
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Update on CAI flight recorder repairs from CNi (GPS Dateproblems)
On Sun, 14 Dec 2014 01:32:54 -0800, Ventus2NZ wrote:
Is there an updated gps engine we can fit in the 302ddv to keep these units going as an fai logger? Since FAI issues approvals for each individual model of logger, does this modification mean that the logger is no longer an approved model and hence no longer valid for badges, records, etc? I genuinely don't know if this would be the case: can somebody who is up to speed with GNSS approvals comment? -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
#6
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
At 11:40 14 December 2014, Martin Gregorie wrote:
On Sun, 14 Dec 2014 01:32:54 -0800, Ventus2NZ wrote: Is there an updated gps engine we can fit in the 302ddv to keep these units going as an fai logger? Since FAI issues approvals for each individual model of logger, does this modification mean that the logger is no longer an approved model and hence no longer valid for badges, records, etc? I genuinely don't know if this would be the case: can somebody who is up to speed with GNSS approvals comment? -- martin@ | Martin Gregorie You are right. When approval is first given, each manufacturer agrees to certain conditions, which are listed in the Specification Document. Amongst these is: /* Notification of any intended change to hardware, firmware or software must be made by the manufacturer or applicant to the Chairman of GFAC so that a decision can be made on any further testing which may be required. This includes changes of any sort, large or small. */ GFAC may decide that further testing is required, or may just revise the approval document to reflect the change. I do not speak for GFAC. However, there may be a further difficulty. The firmware may need to be changed so that the correct GPS engine type apprears in the IGC file. I am not sure that the source files for the firmware are accessable any longer. Tim. |
#7
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Update on CAI flight recorder repairs from CNi (GPS Dateproblems)
On Sun, 14 Dec 2014 01:32:54 -0800, Ventus2NZ wrote:
On Saturday, December 13, 2014 1:27:35 AM UTC+13, David Kinsell wrote: On Fri, 12 Dec 2014 09:19:24 +0000, Ian Reekie wrote: At 19:48 11 December 2014, Tango Eight wrote: We've had to change tactics slightly to deal with the Cambridge flight reco= rder GPS date problems recently discussed here on r.a.s. Here's the latest: Cambridge 302 needs a new GPS card to fix this the right way. Simply solde= ring in a new battery won't get your 302 through Winter storage (which is w= here *my* 302 vario is right now). Few people will want to remove a vario = for the Winter to maintain the GPS date. This problem will be repaired under our existing CAI 302 flat rate policy: = we fix (almost) any 302 and provide a 1 year warranty and fresh barograph c= alibration for $350. Cambridge model 10/20/25 flight recorders were always intended to be mounte= d in an easily removable fashion, so we feel that the battery only fix is b= etter economy for these older units. CNi will replace the GPS date battery= , fix your date problem and calibrate the barograph for $125. It will be u= p to you to maintain the battery by powering up the flight logger for a few= hours every 3 months or you will lose the date... there will be a warning/= reminder label on your returned unit to this effect. Gary Kammerer handles all of our CAI service, please find contact info for = Gary on our website. Best regards and Good Soaring in 2015, Evan Ludeman for ClearNav Instruments www.ClearNav.net please join our forum for discussion of all things ClearNav http://clearnav.net/simplemachinesforum/index.php With regards to the older Cambridge loggers ie model 25. Is it feasible to mod the logger such that the GPS internal real time clock is powered off the same user replaceable 3v higher capacity lithium battery that provides the loggers seal ? I was stupidly thinking of a wire and a low V drop diode ? (Would this mod mess up the GPS by injecting interference/noise into the screened receiver ?) There already is an aux power input for that battery at the interface, 4-35 volts, so obviously goes to a regulator. A better technical solution would be for the firmware to use a few bits of the non-volatile memory on board to prevent the time from going backwards, but that's not going to happen. Given that the old GPS-NAV models never have produced valid IGC files, I would expect the cost of trying to do hardware modifications would exceed any reasonable valuation of what they're currently worth. The brain damage of trying to get OLC to accept the files has to be figured in there somewhere. Similarly, the 302 has had chronic data corruption issues in the flash that were never fixed, so dropping $350+ today to swap out engines is really hard to justify. But there's credible information that the black- case models of those already have the newer engine, and may well be good for a number of additional years. -Dave Is there an updated gps engine we can fit in the 302ddv to keep these units going as an fai logger? -Alan. There was a GPS15 that superceeded the GPS25, physically smaller but drops in with a physical adapter. Ian Macphee in Australia has claimed that these were used in back-case 302's. I have a black-case unit, it's still good, and the igc file says GPS25. I've heard of other black-case units also being good. Perhaps if people posted their results with the two different case types that would be helpful. Or I expect ClearNav could shed light on the issue. Ian works on Cambridge units in Australia and should fully aware of the situation. If GPS15's have been used in some units, perhaps they ought to be grandfathered at this point, much the same way the whole GPS-NAV line was grandfathered without producing valid IGC files in the first place. -Dave |
#8
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
Well the rumor mill is hot today!
The whole point of the exercise is to preserve the utility of the 302 as a secure flight recorder. Thought that was sort of obvious.... The GPS card in the 302 vario was changed twice that I know of during production. The CNi fix uses the same GPS 15 unit as the most recent 302 production. best regards, Evan Ludeman for CNi |
#9
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
I took my 302 out of my glider this week because it is not good. It has a black case and a GPS25. Was bought in 2007.
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#10
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Update on CAI flight recorder repairs from CNi (GPS Date problems)
You should update your web site ...
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