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Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Sun Mar 08, 2015 4:22 pm
by Dougs
It's been a very long time since I last updated on this build but finally I have been playing quite a bit today first time I have had a full day of building for over a year got some very good progress and made one little mistake, I tapped a couple of 6BA holes with 5BA tap so I need to silver solder the holes up and re tap I haven't tried this method before but it should workout.
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I am determined to get it running on air soon.

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Sun Mar 08, 2015 5:08 pm
by 34053
Thanks for the Update, Dougs. Really starting to look 'the business' now.

PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Sun Mar 08, 2015 6:09 pm
by Dougs
34053 wrote:Thanks for the Update, Dougs. Really starting to look 'the business' now.

PW

Thanks but you know this is only the warm up for the main event ;) that's kinda why I am rushing to get it done so I can move on to the BoB class :)

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Apr 27, 2015 7:12 pm
by Dougs
There has been a bit of progress on Speedy I decided to sort out the rear end while I am waiting for some parts to build some measuring equipment (more on this later)
The rear end has a small buffer beam which is not what is actually fitted to the real thing
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The remainder is made up from an adapter plate which does not look vey good
The rear end should look like this
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First off I got a large plate on the cnc Miller and cut the outside and then spotted the hole centres
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Then got riveting 43 of them not much fun to be had doing those that's for sure
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That's much better! I have just finished the paintwork so I will pop a photo up when it's back together

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Fri May 01, 2015 4:56 pm
by 34053
Thank you for the 'Progress Report', Dougs.


PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Sun Jun 07, 2015 8:36 pm
by Dougs
Some more progress this morning ( my wife left me alone for a couple of hours an amateur mistake) so I decided to get on with the valve rod guides or " valve end caps "
First off some 28mm gunmetal as they are basically bearings.
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I love this saw it makes very short work of jobs like these
Spun it up on the lathe and reamed it 3/16" it has a good 11mm of bearing surface
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I made these a very good fit 0.01mm so it's a tight fit
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Trial fit
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And pushed home
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The other cylinder
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The front ones are just blanks I will add faux guides later as these are a visual detail on the 1500 class
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It all seems to seal quite well with the valve bobbin Central the piston sucks back to a central position when moved
It's all getting close to a test run looking forward to trying it out :)
That's all from me for now

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Jun 08, 2015 9:59 am
by 34053
Many thanks, Dougs. Can't wait to see/hear about the 'test run'. :)

PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Sat Sep 26, 2015 7:19 pm
by Dougs
It's been a while and I have had quite a bit of progress
Quite a bit of tidying to do but I have the first crank done
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some progress again now I have fixed my milling machine which has been giving me some real issues lately
got the first return crank properly fitted with mini bolts and a taper pin all dialled in.
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And the first test run at last

Properly happy with the result and this is just one side running looking forward to having two cylinders :D
With a bit of measuring and generally considered thought I have come up with a drawing for my Eccentric Rods it puts the important bits where they should be and still retains a roughly similar appearance to the original.
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Finally got round to finish the eccentric rod this now completes this side of the motion now I need to do it all again :)
the mill finishing the rod
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And the rod fitted to the loco I am really happy with the result as I had to redesign it completely to fit the return crank I made all the clearances are fine.
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Just after the photo I finished my last bolt too in the radius rod

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Sep 28, 2015 11:32 am
by 34053
Thank you for the Progress Report, Dougs. You must have felt very relieved after that 'Test Run'. :ymapplause:

PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Sep 28, 2015 3:53 pm
by Spitfire
That test run is something else :ymapplause: :ymapplause:

That must have been a lovely moment - it even sounds right :D :p

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Wed Sep 30, 2015 9:36 pm
by Dougs
I must admit I was very happy with the result it's quite a test to run on just one side it really proves it out that everything is setup correctly not too much more to do to get both cylinders up and running this is one seriously powerful locomotive.
I have been working on my design of Sir Kieth Park too which is coming along nicely I am doing a full 3D cad drawing first as this design method means that when I build it it will work and I won't have any errors or issues to deal with I will post some pics soon of the cad model so far

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Thu Oct 01, 2015 11:15 am
by 34053
Dougs wrote:I have been working on my design of Sir Keith Park too which is coming along nicely I am doing a full 3D cad drawing first as this design method means that when I build it it will work and I won't have any errors or issues to deal with I will post some pics soon of the cad model so far


Looking forward to seeing that, Dougs. :D

PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Tue May 31, 2016 8:33 am
by Dougs
It has been a long time since i posted about my loco build, this is partly because i havent been able to get as much done as i would like however i have made some significant progress, the "bottom end" is now complete has been timed and runs very well in forward and reverse on both cyclinders.
i have machined the front door and door ring and made the smokebox,
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and at last i have started to build the boiler,
the front tube plate and former block
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to bend the copper it has to be heated several times to soften it so it can be worked without cracking
first go;
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secound go
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third go
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fourth go
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5th go and a trim up on the lathe
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this will be the front of the boiler and i will have to drill 29 holes in it for the tubes and connections.
i have another four of these plates to make of various shapes and sizes and then 3 "wrappers" that cover it all up. but good progress is being made.

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Tue May 31, 2016 10:46 am
by 34053
Thank you for the Update, Dougs. You certainly have to have a lot of patience to get things 'just right', especially with that tubeplate. I'm very impressed. Look forward to seeing the finished article.

PW

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Jul 25, 2016 10:08 am
by Dougs
still boiler bashing :D
making some good progress albeit lots and lots of work
Been working on the boiler smokebox interface. My modification to the original makes the diameter of the boiler 8mm less so I can lag it and the outer cover will remain the same so I needed an interface ring on the smokebox to the tube plate, all of which has to fit with no gaps.
to make the ring up I rolled some brass and some copper sheet then silver soldered together and then trimmed down to size with the lathe.
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It all fits nice and snug :)
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this time it was the outer wrapper which I decided to anneal outside as its a huge bit of copper and way too hot in the workshop to add more heat.
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Got it all together and fixed with temporary bolts (to be replaced with 1/8 copper rivets)
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It took ages to get lined up properly and square I am going to have a full build up before I solder it together just to make sure it all fits as I want it. but its starting to look like a boiler.

Re: New build 5" Gauge 15xx class loco "Speedy"

PostPosted: Mon Jul 25, 2016 3:33 pm
by 34053
The Boiler's looking great, Dougs! Fantastic job, I must say. :)

PW