Filmed from soon after exiting from the tunnel until stopped at Ashford International Station.
Filmed on my mobile phone (a Samsung G600) but the video came out "sideways" so I had to "rotate 90 degrees" in Avidemux before upload to Youtube.
Luckily I was sitting in a fairly good seat for filming - forward facing and at the rear of a window section. Sitting on the right is also a bonus as I see the other track and other passing trains.
I was tracking the train's speed with Blackberry Maps (Curve 8900) and most of the time it was doing about 182mph but I got the full 186mph occasionally.
Because it was scheduled to stop at Ashford International I think it only reached about 135mph max on this section shown in this video. The posts supporting the wires are about 60 metres apart (according to Google Maps) and it seems to pass one post per second. 60 metres per second multiplied by 2.24 gives about 135mph.
As it approached Eurotunnel the speed seemed to drop to 100mph so I guess that must be the Eurotunnel speed limit.
The other tunnel section between St Pancras and Stratford International was a bit quicker as the GPS was showing 140mph as it exited at Stratford, and then the speed gradually built up to 186mph as it passed through Ebbsfleet International and the Medway Bridge.
The section between the tunnel and Paris was mostly about 180mph apart from when it had to stop at Lille Europe.
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