I followed this today...

[petermcleland]

http://jetphotos.net/viewphoto.php?id=7241400

It crossed over Heathrow at 27000 feet and continued heading about 160 degrees and went across the channel...I followed it to about halfway across and then I think he switched off his transponder. His TAS at that altitude was 324 knots. Pretty impressive! It is a Pilatus PC-12/47 US Airforce using Flight Number TROJN2.

[DaveB]

Yeah.. they do go like billio don't they. Lovely scheme that too

ATB
DaveB

[Garry Russell]

I doubt he turned anything off

Likely this is not Mode S and being displayed on the new software that requires a minimum of four receivers triangulating the position and him being fairly high. He most probably ran into a blind spot.

Happens here.

None of the extras show over here only until about 30 mile north. and about 50 miles W

[NigelC]

That triangulation thing (Multilateration) using 4 receivers triangulates the position of a Mode S transponder.

The "Normal" Flight Radar 24 etc traffic is ADS-B equipped. (Mode S + ADS-B)

Mode S is mandatory in controlled airspace as that's what TCAS works from.

[Garry Russell]

Cheers Nigel...couldn't remember what it's called

[Vancouver]

[quote="NigelC"]That triangulation thing (Multilateration) using 4 receivers triangulates quote]

Shouldn't that be Quadrulates then?

[Garry Russell]

It's a minimum of four so that means a minimum of two triangualtions...so that's four to give two

[Airspeed]

That's a good speed with the undercarriage down, Peter!

Were you following it on one of the global tracking sites?

All that SADS Bs and what not, went right over my head, I hope none of it was rude, I wouldn't want to have been offended. (like they do on the drive on drive off ferries?)

[petermcleland]

Mike, I was locked onto it in "Flightradar24"...I locked to it as it passed Heathrow and watched it till it was about halfway across the channel...It then vanished. I then searched for a picture of the actual aeroplane and that it what I put up I did take a screenshot, but I haven't processed it yet

[dfarrow]

I'll get my coat ready ! ... Airspeed don't want to offend any maritime people reading ... but after The Herald of Free Enterprise ; weren't they nicknamed .. Roll On , Roll Off , Roll Over ferries ? RoRoRo .... instead of RoRo .
Youtube showing brilliant ship handling http://www.youtube.com/watch?v=Kw2r3Of0miE ...... Does anyone know if FSX can emulate that ?

Apols Peter if offthread , back on line . Who / what are these quasi US military a/c .. PC 12s , Dash 8s , Polish twin props etc . carrying ? On the FC site quite a few go through Mildenhall and Prestwick , is it secret squirrel and will I be getting a knock on 't door for asking ?

ATB dave f .