Scale variations on PET Crewe tramway loco

michael mott

Western Thunderer
I have been fascinated with the small in works locomotives of Crewe and Horwich ever since coming across the article on the restoration of Dot in Railway Bylines particular issue is out in the shop at the moment I cannot remember the issue but will add it later. (9:6 ) All this began really with my engagement with the Gn15 forum quite a few years ago now. I made a model of one of the Horwich locos on a Bachmann Percy chassis and called it Mercury. this loco was for the fictitious locomotive works that I called Macton Locomotive Works which was built tp a scale of 1/24th inch to the foot
this micro layout evolved over a number of years and included some track scaled to the full size of 4 foot 8 and half, next to the works and terminated in a loading area. the layout was seriously damaged by moisture while in storage during a move to the country in 2008 It languished in boxes in a new shop until I was inspired to try and rebuild it.
I made a new baseboard and played with the various bits that could be re worked. Here is a shot of the Beyer Peacock loco type I called Mercury. on the board with one of the arrangements.

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I played will quite a few arrangements for a few days and had to put it away to deal with some commission work. Somewhere along the way I heard about the Crewe Works Tramway book by Taylor and Talbot and procured a copy. I was hooked and began a small brass model of Pet on another Bachmann Percy Chassis

This picture shows the peco 00 guage (representing 18inch gauge) and the hand laid code 225 nickle silver rail stripped out of some American O gauge set track.

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Breakfast calls!... will continue after.

Michael
 

michael mott

Western Thunderer
Fed and watered.
The surface in the last photograph was 140lb watercolour paper laid down wet and some wagons run back and forth across the track to creat the indent then trimmed out.

I purchased the coloured general arrangement drawing of Pet from the NRM and have been putting together a cad drawing with the various elements on different layers, it is an old 2002autocad lt package so don't expect anything more than simple 2D stuff. I have only been able to set this up as a PDF all my previous attempts to save it as a JPG have failed it looks like it will end up as an attachment at the bottom of the post.

The frames for the present model the is 0 gauge

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I have to get outside the house for some fresh air.... will continue.

Michael
 

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michael mott

Western Thunderer
Continuing on, I decided to try and use some recycled motors and gears and found this one from the defunct printer.

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After a bit of figuring I was able to fit the white gear to the front axle and fitted the motor to a bit of Evergreen strip.

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The end plates are made from some .020" sheet and are the second set that I cut out because the first set became deformed when trying to emboss the rivet detail. I ended up machining the rivets from some 1/8th brass rod from Home Depot which actually machines much better than the KS brass.
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The central boiler part has some 1 1/2 inch ABS plumbing pipe as the foundation with some .010" styrene wrapped around.

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At this point in the build I discovered that I have made a mistake with the diameter of the wheels by referencing a print for 45mm gauge track it was a silly but simple mistake and so I needed to reduce the diameter of the wheels. I ganged them up on the mandrel and skimmed them all down the appropriate amount the reset them on at a time to re-profile the treads.

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The smaller wheels also caused a new set of frames to be made.

To be continued

Michael
 

Mike W

Western Thunderer
The frames for the present model the is 0 gauge

Really nice Michael, but I'm not clear about the scale. You started talking about 1:24 and one of your drawings is entitled "Gauge 3" which is close to 1:24 (1:22.5). So where does the "0 Gauge" come in?

Mike
 

michael mott

Western Thunderer
Ah yes this loco is 0 gauge, I have a number of different sets of drawings and I was only able to convert the 0 scale one this morning to a pdf it is the same drawing that I am using for the 0 scale model my main drawing computer is out in the modelshop. it is an old XP because my old version of autocad does not save in anything but dxf that I can use to put into corel draw in order to create PDF's or JPEGs which are the easiest to view in forums. and the computer that I have in the house that is connected to the internet is windows 10 and my converting computer taking the DXF's to Corel is windows 7 (don't ask) need less to say I am not interested in learning all sorts of new technical software so continue with my luddite ways of sorting out stuff. I hope that this clarifies what I am doing
My 0 gauge model is for another micro model depicting the inside outside of a section of the crew works.
Log in to Vimeo

I am simultaneously building a Pet that is Gauge 1 or 45mm for my Garden Railway it will be battery as well. but will be made with steel frames and brass and plastic. Currently my garden is still under a blanket of snow.

I am presently attempting to start at the beginning and working through the process that has already happened and working up to the present.
it is also why I called the thread scale variations.

cheers Michael
 

michael mott

Western Thunderer
After the wheels were resized it was apparent that I needed to change the position of the axles to give the proper rail height, long story short I made a new chassis. after that the top of the boiler was reinforced to support the water tank an coal hopper.

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A couple of variations on the tank and hopper followed

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The second tank allowed me to correct the rivet pattern.

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The brass dome and chimney are added the dome was made by turning down some solid bar boring out the bottom and then annealing the brass and forming the flange .

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The support posts and railings were a simple turning job and attached with some 2x 56 brass bolts from underneath.

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to be continued.

Michael
 

michael mott

Western Thunderer
Some further progress on the frames for the G1 loco, after putting a rivet into the pair of frames to lock them together I started the filing to get them clean and even.

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After it seemed like hours of sweat equity I remembered that I have a die filing machine, I don't use it very often and so it only occurred to me after working at getting the axle openings square. Hmm I thought I have a filing machine...

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Putting black marker on the edge allowed me to see what was what regarding the squareness of the important areas it did not take long tto clean up the frames from there on. I placed the previously turned wheels over the frames for a sense of the new loco.

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Next I popped out the rivets and did some de-burring of the holes.

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That's it for today.

Michael
 

michael mott

Western Thunderer
A bit more about the O gauge pet, in order to change from track power to battery power the top of the boiler needed to be hacked out to accomodte the toy radio and batteries.

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A small battery holder was fabricated from strip styrene.

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and after a bit of fiddling around I got it all fitted together. and a couple of thinned coats of black semi gloss tamiya were brushed on to harden up before doing any further work.

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I have just purchased some Jax brass blackening to do the wheels so tomorrow will see how that works out.

Michael
 

michael mott

Western Thunderer
Switching gears, today I spent some time with the 45mm gauge Pet, I had already made the wheels and frame sides the frame sides are cut and filed out of some .079" cold rolled steel. I have also been thinking about scale wheels for the S32 and for some unknown reason I re profiled the wheels to a finer flange. Then it occurred to me that I am not building a model that is S32 but a model that is 10.16 :1 which is the same as 30mm to the foot the crew locomotive is 18 inch gauge so 45mm =1.5 feet so 1 foot =30mm Are you confused yet? so I remade the wheels to the correct scale with correct flanges for the scale. This model will run on 45mm track.
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The bottom wheel is correct for the scale.

Also today I was sorting gears to find something to drive this model, it will be battery powered and run mostly on an indoor cameo layout.
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The gearhed motor with a bevel gear loos like it will work.

Michael
 
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