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Build Diary entries for October 2021

Here are the diary entries for this month. You can use the forward and backward links to see the next or previous months. Most photos taken before 2018 are small size. From 2018 onwards, most photos you see below will have a link to a full size image by clicking on the photo.

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Bogie Assembly Trial Fit
04/10/2021
  Highslide JS
  Today was the first trial assembly of the bogie frame; Chris and Bob take a breather from our efforts. We still have to fit the AWS receiver stay between the lifeguards - we have this in stock. SSLC's Monday Gang have been trained in use of the overhead crane at CTL Seal which makes the job a lot easier
   
Bogie Centre Slide Testing
11/10/2021
  Highslide JS
  The bogie pivot pin, bolted to the main frames, engages in a bush within the bogie centre slide. The centre slide is able to move laterally while being restrained vertically by plates with a bevelled edge (V strips on the drawing). The movement of the centre slide is resisted by side control springs. This set up smooths the locomotive's entry and exit form curves as well as reducing flange wear on the driving wheels. We need to ensure that the centre slide can move left and right and does not bind on the bogie stretcher. Today we slowly lowered the centre slide into place checking that clearances are adequate. Here the centre slide is just above where it will sit on the wear plates while John checks clearances. We believe that a further 3 thousands of an inch need to be machined off the centre slide vertical face as clearances are a bit tight in places. The centre slide is being lifted by large magnetic lifting eyes. On the centre slide you can see the 4 bosses for oil lubrication pipes.
   
Fixing the Frame Extensions
18/10/2021
  Highslide JS
  Bob and Craig from CTL Seal have working on permanently fastening the frame extensions to the main frames. At the moment we're working with the fitted bolts that fix the plates together. Later on, we will be fitting the bolts that have to go through the main frames/frame extensions/firebox support stretcher. The left hand side, to the left of Craig has had the top 3 rows of bolts (10 in all) fitted. You can see the spot facing under the bolt head to ensure that the head of the bolt fits tightly against the frames. You can also see the Philidas lock nuts on the inside of the frames. On the right hand side of the frames, 6 bolts have been installed and these are a tight, interference fit. The bolt heads that can be seen on the right hand frame are temporary bolts. You can also see the dowel that marks the datum point for all measurements. It's slow and steady work but this has to be right!
   
Bogie Trial Fit Continues
18/10/2021
  Highslide JS
  The AWS receiver stay was fitted to the bogie frames on a trial basis today. This stay supports a bracket holding the Automatic Warning Receiver that provides a warning to the driver if a signal is not at green. The stay sits between the lifeguards at the front of the bogie.We have not been able to find a drawing for the Class 6 engine and have used the one for Class 7, the Britannias. It's likely that British Railways never got round to doing the drawing. We have to do some work to establish the exact height which the received needs to sit above the track.
   
Bogie Spring Cradle Plates
19/10/2021
  Highslide JS
  The main suspension for the bogie is via 2 leaf springs, each of which sits in a spring cradle that runs fore and aft along the outside of the bogie frame plates. The ends of the spring Cradle sit in cups on top of the axle boxes. Tyler Bros have sent us this photo of the plates which will be delivered to CTL Seal. You can also view a video here.
   
Centre Slide Machining
25/10/2021
  Highslide JS
  Jamie Black, the machine shop manager at CTL Seal, measures the bogie centre slide with a large external micrometer to agree the work required. The slide only needs a light skim on the machine to get the correct clearance.