Templot Club Archive 2007-2020
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posted: 22 Apr 2011 20:04 from: Raymond
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I felt like trying a complex plan so, looking through Selected GW stations by R H Clark, I happened upon Princes Risborough and thought, "why not"? It proved not as simple as first sight might suggest it might be but an interesting challenge, especially as the lines west of the platform were drawn 'not to scale' and had to be extrapolated. In S7 this takes up something of the order of 46 feet. It simply goes to show how large an average passing station could be. Raymond |
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| Attachment: attach_1042_1463_Princess_Risborough_10.box 299 | |||
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posted: 25 Apr 2011 18:30 from: Richard Spratt
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What surprises me is just how straight it is. Is that correct? |
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posted: 25 Apr 2011 19:07 from: Jim Guthrie
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Richard Spratt wrote: What surprises me is just how straight it is. Is that correct?I've just checked on Google Earth and it does have a few curves - back to the drawing board for Raymond.  BTW, why the (to me) peculiar track layout to the south of the station where two separate lines appear to leave the station and split apart, but eventually come back together again to form, one track. At first I thought it might have been for some flying junction arrangement but Google Earth doesn't show any old earthworks which might justify this. Jim. |
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posted: 25 Apr 2011 21:15 from: Rob Manchester
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Hello, According to the ever useful Wikipedia :- 'The single track line between High Wycombe and Princes Risborough was upgraded to a double track. Because of the gradient the new Up line followed a different route (with a short tunnel at Saunderton) from the existing single track, which became the Down line (with a few changes because of the gradient or for other reasons). The Great Central built a new line from Marylebone to join this railway at South Ruislip (then called Northolt Junction)' It seems odd that a small offset in the route would have a gradient sufficiently different to make it worth it. You can see the alignment on the OS map at multimap. The contour lines don't seem to indicate much in the way or steep hills and indeed there is a golf club next to the line. Rob |
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posted: 25 Apr 2011 21:17 from: Rob Manchester
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....just to be safe on the Wikipedia 'terms of re-use' policy I should add that the page containing the above info is at : http://en.wikipedia.org/wiki/Princes_Risborough#Railways Rob |
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posted: 25 Apr 2011 22:13 from: Nigel Brown click the date to link to this post click member name to view archived images |
Looking at the O.S. map (on the ever-useful Anquet Maps) the summit of the line is around where the lines split going north, around 425' above sea level, the lines then descending to 340' at Princes Risborough. Looking at the cuttings/embankments involved, the northbound line seems to maintain a higher line for longer, which would give a steeper descent at the end down to Princes Risborough. Presumably the southbound line was engineered to give a more even climb throughout. It was also straighter. |
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