|
Title: Limping HST Post by: pbc2520 on October 13, 2011, 17:02:42 Yesterday's 1314 HFD-PAD spent most, if not all, the journey without the rear power car. I joined at WOF, where it was about 13 mins late as a result. It arrived into PAD still 13 mins late, unable to make up time and delayed the down train at Wolvercote. Not bad for a one-legged HST in the Cotswolds and, between Twyford and Slough, even managed to top 120mph.. eventually!
For you delectation... 1359 WOF-PAD 2011-10-12
(I see today's 0643 HFD-PAD was running 20 mins late due to a faulty train.. hopefully not the same one!) Title: Re: Limping HST Post by: CLPGMS on October 14, 2011, 22:39:57 FGW does appear to be going through a period of problems with HSTs. For example:
Monday 3rd October. 1750 PAD-WOS terminated at Oxford due to a train fault. This also meant the cancellation of the 2059 WOF-PAD, much to the annoyance of Cotswold Line Promotion Group Committee Members who planned to return on it from Evesham after a meeting! Sunday 9th October. 1545 Paignton to PAD developed a fault in the Taunton area. After attention there, it got as far as Bristol T.M. and was replaced by another set. Thursday 13th October. 0822 PAD-HFD departed on time but was 40 minutes late at Reading due to a fault on the train. Title: Re: Limping HST Post by: JayMac on October 14, 2011, 22:41:37 Are problems arising as the stock begins to be winterised perhaps?
Title: Re: Limping HST Post by: Western Enterprise on October 17, 2011, 14:43:56 "even managed to top 120mph.. eventually"
Thats good going, if my memory serves me righ, on about 2,300hp ish ? Title: Re: Limping HST Post by: pbc2520 on October 17, 2011, 21:27:05 Your memory serves you right - at 2,280bhp the MTU 16V 4000 R41R engine (http://www.mtu-online.com/mtu/products/engine-program/diesel-engines-for-rail-traction/diesel-engines-for-push-pull-trains-and-locomotives/detail/product/398/cHash/c87ce55e0fbdc23d34cb5949c18353b6/) is slightly more powerful than the old 2,250bhp Paxman Valenta. I was surprised too but if it's going to happen anywhere, it'll be on a nice long, straight and level section.
For today's 1551 PAD-WOS, a 3-car turbo showed up, which passed a stabled HST at Oxford >:( I didn't manage to hear the reason given for this. Title: Re: Limping HST Post by: pbc2520 on October 17, 2011, 21:51:48 In fact, the figures I recorded on my computer actually give some inkling as to acceleration of an HST with one engine:
900.0 / (1318432391.007 - 1318432381.863); (* 98.4 *) 900.0 / (1318432434.714 - 1318432426.249); (* 106.3 *) 900.0 / (1318432484.184 - 1318432476.098); (* 111.3 *) 900.0 / (1318432523.283 - 1318432515.664); (* 118.1 *) 900.0 / (1318432568.820 - 1318432561.263); (* 119.1 *) 900.0 / (1318432598.024 - 1318432590.646); (* 122.0 *) 1800.0 / (1318432635.071 - 1318432620.008); (* 119.5 *) The long numbers are times in seconds that mileposts are passed, accurately recorded by eye against a mark on the window. Each line records times at posts 1/4 mile apart (1/2 mile apart in the case of 1800.0 / ...) so the speeds are averages over the section. As these times are absolute you can see the time over which speed was gathered: about 3.5 minutes to accelerate from 98mph to 122mph in these particular conditions. Well, I found that interesting... :) This page is printed from the "Coffee Shop" forum at http://gwr.passenger.chat which is provided by a customer of Great Western Railway. Views expressed are those of the individual posters concerned. Visit www.gwr.com for the official Great Western Railway website. Please contact the administrators of this site if you feel that content provided contravenes our posting rules ( see http://railcustomer.info/1761 ). The forum is hosted by Well House Consultants - http://www.wellho.net |