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Princes Risborough

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Princes Risborough

Unread postby Mike Stone » Wed Mar 23, 2016 7:02 pm

http://www.chinnorrailway.co.uk/article ... h-landmark
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came across this while investigating the appearance of a track access application for the Chinnor and Princes Risborough Railway.
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the news item referring to the re-connection of the railway to NR refers to an interm lease of the box from NR.
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Re: Princes Risborough

Unread postby Chris Osment » Wed Mar 23, 2016 8:11 pm

I note the claim that PR is the "largest surviving GWR signal box" at 126 levers. Surely that accolade should go to Exeter West at 131 levers?
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Re: Princes Risborough

Unread postby Richard Pike » Wed Mar 23, 2016 9:32 pm

I have some dog charts for this box.
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Re: Princes Risborough

Unread postby MRFS » Wed Mar 23, 2016 9:57 pm

I suggest the words 'in situ' or 'original location' are missing.
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Re: Princes Risborough

Unread postby John Hinson » Thu Mar 24, 2016 2:32 am

Chris Osment wrote:I note the claim that PR is the "largest surviving GWR signal box" at 126 levers. Surely that accolade should go to Exeter West at 131 levers?

I'm not sure that's a fair way to judge size - I suspect architecturally Risborough North was probably significantly larger because it was built to accommodate a 126-lever frame at 5¼" centres whereas Exeter West was built to accommodate 118 levers at 4" centres. Risborough North is recorded as 79' in length, not sure about Exeter West's dimensions but I would not expect them to be near that. Both later had frame renewals.

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Re: Princes Risborough

Unread postby Fast Line Floyd » Thu Mar 24, 2016 2:27 pm

John Hinson wrote:
Chris Osment wrote:I note the claim that PR is the "largest surviving GWR signal box" at 126 levers. Surely that accolade should go to Exeter West at 131 levers?

I'm not sure that's a fair way to judge size - I suspect architecturally Risborough North was probably significantly larger because it was built to accommodate a 126-lever frame at 5¼" centres whereas Exeter West was built to accommodate 118 levers at 4" centres. Risborough North is recorded as 79' in length, not sure about Exeter West's dimensions but I would not expect them to be near that. Both later had frame renewals.

John

Surely John that isn't quite right regarding Exeter West, I thought it was 118 levers at 5¼" centres which would explain why there is plenty of room for a 131 lever frame at 4" centres.
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Re: Princes Risborough

Unread postby John Hinson » Thu Mar 24, 2016 4:10 pm

Fast Line Floyd wrote:Surely John that isn't quite right regarding Exeter West, I thought it was 118 levers at 5¼" centres which would explain why there is plenty of room for a 131 lever frame at 4" centres.

I'm pretty sure it was 4" centres. Remember it only opened in 1913. 5¼" frames were a bit old hat by then. We are only talking a difference of 23 levers to fit in, 12 or so at each end.

I don't know if the window sections are exactly the same size (but I doubt they differ greatly) but Exeter West has 7 against Risborough having 9. If you look at photographs there is really no contest.

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Re: Princes Risborough

Unread postby Chris Osment » Thu Mar 24, 2016 7:25 pm

The first frame in the 1913 'temporary' <g> Exeter West was indeed 4", being a 3-bar HT.

Curiously, none of the 'usual sources' seem to quote a size for the actual box structure......
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Re: Princes Risborough

Unread postby JRB » Thu Mar 24, 2016 8:46 pm

Were 4" Double Twist frames usual?
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Re: Princes Risborough

Unread postby Mike Stone » Fri Mar 25, 2016 6:11 pm

it will be interesting to see how they propose to control their part of the station - the slew carried out recently seems to be slightly counter productive putting their trains onto the NR Thame branch rather than independently into the station. The TAA promises a map but none of the links work - I've tried prodding the webmaster.
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