C172 Crash near to Madrid
Join Date: Aug 2005
Location: Glens o' Angus by way of LA
Age: 60
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No I don't think so, I have a hunch that after Paris, Brussels and all the threats ISIS have been throwing around the security forces have been given the mandate and the budget to deep dive everything and anything that is even slightly out of the norm. Some guy in a strange looking plane capable of landing anywhere arriving from overseas circling over the Lake District at different altitudes at twilight when the flightplan listed Blackpool as his destination probably raised some eyebrows. Although there was a perfectly legitimate explanation you can see from their point how the optics weren't good on it and further investigation was needed.
pb84,
Your posts about your trials and tribulations reminded me immediately of a pertinent quote from THHGTTG:
I suspect the clincher for the Blackpool plod was when they discovered the pilot spoke English with a strange accent! 
* The irony of this particular quote is that it was spoken by a character with a Scottish accent!
Your posts about your trials and tribulations reminded me immediately of a pertinent quote from THHGTTG:
You DO lead an interesting life, Mr. Beeblebrox*
* The irony of this particular quote is that it was spoken by a character with a Scottish accent!
Join Date: Aug 2005
Location: Glens o' Angus by way of LA
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There is another anomaly about this flight that is unrelated to cops, mechanical faults or dubious airmanship that has got me puzzled and that I'd like to throw out and see if someone with a tad more grey matter than myself can answer.
Firstly, I use 2 GPS systems for navigation, the primary is a panel mounted and integrated Garmin 496 VFR unit with external antenna that has never ever failed me. The second is an IPAD mini running Skydemon, sometimes I have the IPad blue toothed to a Garmin GLO other times I don't bother and just use the IPADs internal GPS receiver, regardless of method it also has never failed or frozen on me.
Upon my departure from Jersey it was pretty much IMC conditions right after departure and upon reaching 1000 feet, about 20 miles out I lifted my instrument scan to view the iPad for a verification of my situational awareness and was rather perturbed to notice the little airplane icon was in a tight right turn, I want back to my steam gauges to verify I was climbing straight ahead which I was, and a glance over at the Garmin verified this and confirmed the Skydemon info on the iPad was erroneous. I looked back at the IPAD and it was switching back and forward from an altitude reading of 22,000 feet and 500 feet so it was decidedly in error ( which was a first and very surprising). Anyway I continued and subsequently completed my journey, the next day I looked back over my flight track on flightradar24 ( see link below) and noticed at the point on the flight where the IPAD/SD info went bad near St Anne's Island and abeam the northern tip of the Cherbourg peninsula the radar track shows a sharp right then left turn back on track that I did not make.
My question is, if the info on flightradar24 is accurate, AND I did not make those turns, is it just pure coincidence that both my iPad and the mode S transponder both independently and in error said I had turned? Is there some type of magnetic field or electronic interference at that point of the Channel that could have interfered with both the IPAD and the info the radar was receiving from my transponder ?
Flightradar24 track info
https://www.flightradar24.com/data/a...3110j/#94979e1
Firstly, I use 2 GPS systems for navigation, the primary is a panel mounted and integrated Garmin 496 VFR unit with external antenna that has never ever failed me. The second is an IPAD mini running Skydemon, sometimes I have the IPad blue toothed to a Garmin GLO other times I don't bother and just use the IPADs internal GPS receiver, regardless of method it also has never failed or frozen on me.
Upon my departure from Jersey it was pretty much IMC conditions right after departure and upon reaching 1000 feet, about 20 miles out I lifted my instrument scan to view the iPad for a verification of my situational awareness and was rather perturbed to notice the little airplane icon was in a tight right turn, I want back to my steam gauges to verify I was climbing straight ahead which I was, and a glance over at the Garmin verified this and confirmed the Skydemon info on the iPad was erroneous. I looked back at the IPAD and it was switching back and forward from an altitude reading of 22,000 feet and 500 feet so it was decidedly in error ( which was a first and very surprising). Anyway I continued and subsequently completed my journey, the next day I looked back over my flight track on flightradar24 ( see link below) and noticed at the point on the flight where the IPAD/SD info went bad near St Anne's Island and abeam the northern tip of the Cherbourg peninsula the radar track shows a sharp right then left turn back on track that I did not make.
My question is, if the info on flightradar24 is accurate, AND I did not make those turns, is it just pure coincidence that both my iPad and the mode S transponder both independently and in error said I had turned? Is there some type of magnetic field or electronic interference at that point of the Channel that could have interfered with both the IPAD and the info the radar was receiving from my transponder ?
Flightradar24 track info
https://www.flightradar24.com/data/a...3110j/#94979e1
Join Date: May 2010
Location: UK
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My best guess is that some of your receivers were using a dodgy satellite, occasionally a satellite will loose sync with the rest of the constellation. They are closely monitored but it can take the control centre a while to command the rogue satellite offline.
This is one of the lesser known reasons why GPS should not be used as a primary means of navigation. There was a well reported incident about a year ago when one of the Russian Glonass satellites was causing errors of up to 10 miles for half a day, making life interesting for ships in the English Channel
and Dover Coastguard.
This is one of the lesser known reasons why GPS should not be used as a primary means of navigation. There was a well reported incident about a year ago when one of the Russian Glonass satellites was causing errors of up to 10 miles for half a day, making life interesting for ships in the English Channel
and Dover Coastguard.
