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Old 15-03-2018, 08:34 AM   #21
davey
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Very impressive.
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Old 20-03-2018, 03:36 PM   #22
RSR Engineer
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Default Nearly done

The mainframe itself is now complete and just needs to be set up on the rest of its legs. The assembly work has, as predicted, progressed quite quickly, although a dose of flu had me out of action for a week. Working in shifts of perhaps 3 hours a day, I'd estimate the total effort at some thirty hours. Can't wait to start on the boards.
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The work is documented in somewhat more detail on flickr:
https://www.flickr.com/photos/537755...57693670264075
Attached Images
File Type: jpg NL014x.jpg (237.9 KB, 36 views)
File Type: jpg NL016x.jpg (281.7 KB, 52 views)
File Type: jpg option11-01d20-mainframe.jpg (145.5 KB, 20 views)

Last edited by RSR Engineer; 20-03-2018 at 03:39 PM. Reason: URL
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Old 20-03-2018, 03:43 PM   #23
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Wow, are you going to run real trains on it.
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Old 20-03-2018, 05:05 PM   #24
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It is very impressive, what a lot of space you have for modelling . It looks as if you are very handy with the tools as well. That is wonderful progress . I will look forward to seeing your trains run.
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Old 24-03-2018, 10:41 PM   #25
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Default Mainframe done

Thank you for your compliments, gentlemen. The mainframe is now complete and standing on all its legs. These have been cross-braced in many places to improve stability. All the gubbins that was stood about on top of the frame has been banished to the floor. There will be extra joists (as per the open frame concept) between the mainframe members and, in the area where the north sidings (dark green area) are to go, flush with these, to ensure adequate support for the board material (12mm OSB). See diagram.
Cheers
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The work is documented in somewhat more detail in flickr:
https://www.flickr.com/photos/537755...57693670264075
Attached Images
File Type: jpg NL020x.jpg (313.2 KB, 28 views)
File Type: jpg NL022x.jpg (252.6 KB, 14 views)
File Type: jpg option11-01d20-mainframe+northloops.jpg (147.7 KB, 28 views)

Last edited by RSR Engineer; 24-03-2018 at 10:44 PM. Reason: URL
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Old 13-06-2018, 10:00 AM   #26
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Default Boards marked out.

We are now ready to start cutting out the boards. All tracklines and board edges have been marked out by the grid reference method described earlier. In some places this needed three layers of board. Only at the "interfaces" to the old layout will the cutting be done empirically, i.e. by offering up and cutting to actual size, as opposed to what's in the diagrams.

Pix NL038 & NL039 show the top end of the northern approach with the northern station throat laid approximately in place. Pic NL041 shows the southern end. Pic NL047 shows the turntable with the estimated new line of the headshunt. Pic NL049 shows how the old layout fits into the overall scheme. This was just a temporary setup. The old layout boards will be finally mounted when all other baseboard construction work is complete.

The work is documented more fully on flickr: https://www.flickr.com/photos/537755...57693670264075
Attached Images
File Type: jpg NL038x.jpg (277.7 KB, 12 views)
File Type: jpg NL039x.jpg (365.1 KB, 14 views)
File Type: jpg NL041x.jpg (326.1 KB, 12 views)
File Type: jpg NL047x.jpg (331.1 KB, 20 views)
File Type: jpg NL049x.jpg (325.4 KB, 41 views)

Last edited by RSR Engineer; 13-06-2018 at 10:03 AM. Reason: Forgot URL.
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Old 13-06-2018, 12:25 PM   #27
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That's all coming together nicely. It really is an impressively large layout. I'm sure I'm not alone in being very envious
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Old 14-06-2018, 02:17 PM   #28
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Thank you, Mr Bones. Love your aphorism. Nice one!
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Old 24-06-2018, 04:49 PM   #29
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Default First boards mounted.

The boards for the lower end of the ramps to the northern loops have been cut out, assembled and set up on the mainframe. Supports are at about 30 cm intervals. In this area of the layout, the first few joists are flush with the mainframe.

As always when working to theoretical plans, some details had to be amended as the job proceeded. One change was to ensure that the fork in the boards was at a constant height all the way across at each ramp support (pic 065). Another was to omit certain supports altogether where the fitting of a joist was especially awkward (pic 063), substituting a double thickness of board screwed to the underneath to stabilise the longer span. Pic 064 shows the supports I did install. It is intended to assemble all boards (and the bridges) to check the fit and then dismantle again to leave just the boards at datum level and start laying the track.

The work is documented more fully on flickr:
https://www.flickr.com/photos/537755...57693670264075
Attached Images
File Type: jpg NL063x.jpg (307.0 KB, 17 views)
File Type: jpg NL064x.jpg (285.9 KB, 11 views)
File Type: jpg NL065x.jpg (304.6 KB, 15 views)
File Type: jpg NL070x.jpg (316.3 KB, 21 views)
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Old 24-06-2018, 06:41 PM   #30
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Quote:
Originally Posted by RSR Engineer View Post
The boards for the lower end of the ramps to the northern loops have been cut out, assembled and set up on the mainframe. Supports are at about 30 cm intervals. In this area of the layout, the first few joists are flush with the mainframe.

As always when working to theoretical plans, some details had to be amended as the job proceeded. One change was to ensure that the fork in the boards was at a constant height all the way across at each ramp support (pic 065). Another was to omit certain supports altogether where the fitting of a joist was especially awkward (pic 063), substituting a double thickness of board screwed to the underneath to stabilise the longer span. Pic 064 shows the supports I did install. It is intended to assemble all boards (and the bridges) to check the fit and then dismantle again to leave just the boards at datum level and start laying the track.

The work is documented more fully on flickr:
https://www.flickr.com/photos/537755...57693670264075
That last photo reminded me of when myself and several others built a large 8 lane slot car racing track in a spare hut at RAF Scampton, over 50 years ago! Wonder if it survived.
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