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Class 800 Paddington to Reading in 21 mins 25.8 seconds

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26006

Posts: 21
Class 800 Paddington to Reading in 21 mins 25.8 seconds - Posted: March 10, 2018 - 5:06 PM Quote and reply
GWR have posted a realtime video of a cab ride aboard a Class 800 Intercity Express train (IET) between London Paddington and Reading which achieved a start to stop time 21 minutes and 25.823 seconds for the 35.85 miles.

Whilst this places it in 27th on the list of fastest times recorded and submitted to the RPS between London and Reading, this is the first sub 22 minute timing recorded since the Ladbroke Grove disaster of 1999 - the aftermath of which saw speed limits cut by half from 100mph to 40 and 50mph between Paddington and Ladbroke Grove.

The fastest recorded time between Paddington and Reading remains 20mins 46 seconds recorded on November 20 1988 aboard an Intercity 125 set.

GWR's video is found here:

https://www.youtube.com/watch?v=6BKsnkPtYc8

Key to this appears to have been a fast start out of Paddington, and a clear run into Reading under clear signals. GWR have not confirmed the date or time of the run or train set numbers.

Here are a few intermediate timings gleaned from the video. The start was good - but similar timings have been achieved by members - in particular Sean Emmett's timings of 5 min 26 to Ealing Broadway and 9 mins 51 secs on November 3 2017. This run seems to have enjoyed an identical fast start - but with the added benefit of electrification through to Reading.
Intermediate timings are gleaned from the video timer:

Acton Main Line 4 min 34
Ealing Broadway 5 min 27
Hanwell 6 min 17
Southall 7 min 09
Hayes & Harlington 8min 02
MP 13 9 min 02
west Drayton 9 mins 08
Iver 9 mins 52
Langley 10 min 37
Slough 11 min 40
MP 21 12 min 54
Burnham 13 min 36
Maidenhead 14 min 29
Twyford 17 min 46
MP 34.5 19min 34
MP 35.25 20 min 03
MP 35.75 20 min 30
Reading Platform East end 20 min 43 s
Reading Canopy W 21 min 15
Reading Stop 21 min 25.823

Twyford (pass) to Reading (stop) was run in 3 min 40 sec under clear (green) signals all the way into Reading.

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26006

Posts: 21
Re: Class 800 Paddington to Reading in 21 mins 25.8 seconds - Posted: March 12, 2018 - 12:45 PM Quote and reply
Some further analysis:
Southall to Twyford 21.95 miles in 10 min 38 sec - av 124mph
If this could have been run at an average 127mph - could have saved 16 seconds.
The run into Reading from Twyford was 3 min 38 sec. The 2nd fastest run of 20 mins 49 secs featured a 3 min 19 sec run into Reading from Twyford.
Based on the timings too Twyford of 17 min 47 secs, the following braking rates for the 125mph to 95mph, and 95mph to rest could have yielded the following times:

6% 21:01
7% 20:56
8% 20:51
9% 20:48
10% 20:46

If GWR's run had been able to average 127mph between Southall and Twyford, then that might have saved around 16 secs, and would have required just a 7% braking rate to achieve a 20 min 41 timing, or possibly match the 20 min 46 timing with a 6% braking rate!!

It is a shame that the 800's seem limited to a maximum 124mph!!

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