7mm My GWR 7mm Work Load

Hi All

Following a request in the Q&A section on which spray paint would be suitable for GWR grey, Simon of the Flying Squad fame suggested Rover Tempest Grey,

Well I've now finished this week a Damo B and a Macaw B. These are just as they came out of the spray booth so both have a lot more to do to finish them off. The Macaw B was only built around 20 yrs ago! I've been waiting that long to find a suitable GWR Freight Grey. The Damo B was finished in the last year. I do have the build photos for this model.

The timber on the Macaw B was sprayed with Rover Maple. I also did the G1 Hydra D timbers in the same but that will be in my 1/32 scale topic later.








Dave

Hi All

Here's an up date on the Damo B and the Macaw B. Both have now finished being painted, decals fitted and varnished over them, leaving the white ends to paint on the brake levers, and a full varnish (Klear with a 40% water mix) This I shall attempt to do with an Airbrush (having not used one before)

The Macaw B still requires a couple of lashing Kits (CPL) I've also added a section of chain that I shall be using, this is after it being treated with BC. I have lightly weathered the planking around the edges and down the seams.

Further to the photos in my last post, I forgot to say that having seen Raymond Walley's article on Shackles and chains I shall doing something similar.

Also the stanchions had a small ring a short distance up from the bottom to stop them falling through the outside pockets. So I'm doing the same to mine! This is described in his converting a Connoisseur Macaw J28 (my model) to a Dia. J4. The makers plate on the etch of the J28 is actually in the number range for a J4.

Dave

Hi All

Rather than start a new thread I shall continue here with the Springside 64xx build, below is the link to the first part of the build in RMWeb.

http://www.rmweb.co.uk/community/in...-64xx-rebuilds-rolling-stock-locos/?p=1164027 also #41 in page2

First off are some photos of prototype locos fitted with auto working.

First photo is of 6430 at the Llangollen Rly attached to Auto Coach 163 at the rear, on the front was another AC 167 in BR colours



6430 is the only preserved loco fitted with auto gear I believe! Second photo is also of 6430 that I took on a Photo Charter on the Lincs Wolds Rly, front view but lightened to show detail.


Having spoken to Peter Roles at the Reading Show just recently he said that Dave Sharp of MOK had taken photos of the 1466/4866 which is based at Didcot, and Peters castings say they are for 14/48, 54/64 and 45xx locos. Here's the link http://www.peteroles.co.uk/newsite_044.htm

So in June last year on a RMWeb visit to Didcot with 'Castle' as our host, are four photos of 1466 in black livery but give good detail of the auto parts.




So onto the build so far, the running plate and splashers have been painted in the final coat of paint

It was at this point I decided to fit the auto kit of parts, so first off I had to make a support bracket for the main auto part that goes behind the front BB, it also takes the mech. linkage that joins the two vehicles together. There is also a bracket to be made for the rear BB.

In the Springside kit there are a set of parts for Auto fitting, but not a patch on PR set. so two more items had to be made the support the Vacuum pipes as the kit ones were made of WM and wouldn't last very long before braking off.

I will take photo of what I've fitted so far tomorrow in daylight and add anything else I may have forgotten so far.

Dave

I've always vaguely (Auto trains are not my cup of tea) wondered how they controlled the regulator and cut off on Auto trains, that square additional linkage must be for one of those two controls.

The first shot of 1466 in the shed made me double take, it looked like one of Warrens paint jobs and with the floor so clean I thought it was a model LOL.

The mechanical linkage between autocoach and engine on the GWR controlled only the regulator - lifting / lowering of the regulator handle in the driving end of the coach caused a rotation of the square drive rod between engine and carriage. The rotation of the link is translated (first) into an up/down motion by the bellcrank behind the bufferbeam... and then (second) into a forward/aft movement by the lower bellcrank. The rod running from to back then connects to another set of cranks / levers under the cab floor to provide a lifting / lowering motion for the regulator in the cab. The driver in the autocoach has no control over the forward / reverse cut-off, that is either set by the driver before starting or adjusted by the fireman under direction of the driver.

There is no physical connection between the square drive at the front of the engine and the square drive at the rear... which means that there are two vertical rods in the cab and only one rod is connected to the regulator (dependent upon where the driving autocoach is relative to the engine).

Good grief. No wonder the Southern stuck with the ex-Brighton air system.

Steph

Cheers Graham, all sounds very Victorian and I though TDM was complicated LOL.

All our stuff tends to use Profi-bus, Profi-net or CAN-bus, two wire stuff for control but still at the sharp end requires a mechanical interface to do the actual work, the software required to replicate that simple linkage is rather complex and I do wonder if we've actually advanced at all in the last 90 years!

Time Division Multiplex? No, that's simple; like DCC it's a two-wire system isn't it?

More seriously, it'll be interesting to see you get all this detail into a model, Dave, you don't see it very often.

Steph

Steph Dale said:

Time Division Multiplex? No, that's simple; like DCC it's a two-wire system isn't it?

More seriously, it'll be interesting to see you get all this detail into a model, Dave, you don't see it very often.

Steph

Click to expand...

Steph, edited above but yes, two wire, easy if your just using it, not so if you have to program it to do something without killing anyone in the 1:1 world.

Agreed, it'll be nice to see all those gubbins added under there, visible, but only just and those are the details that lift it above the ordinary.

I've remembered another one of PR castings PR21 I bought to go with this build, the Vacuum Pipes. And some flanges on another set PR23 I have used the remaining parts from this set on the tank tops so the extra flanges are a bonus.
http://www.peteroles.co.uk/newsite_053.htm also these are of use. http://www.peteroles.co.uk/newsite_054.htm what you get on this sprue are eight flanges. There are only two round ones with the vac set.

It looks much better if pipework has flanges fitted, the way I did mine was to cut off the flange from the sprue leaving as much stem as possible, put it in a set of small engineers clamps and drill out to 1.2/1.4mm, some fitting have thicker pipe stubs on them.

Dave

Hello David,

looking at this photo of the 14xx


Looking at the connector on the left as we see the photo, it looks to be a "standard" RCH coach electrical connector normally used for coach lighting. But in this case IIRC it was used for a bell code for the fireman to adjust the cut-off of the loco. If this is the case the RCH connector could be used as it's so low down it could not be connected to the lighting circuit.

About the only other thing that it could be for would be for the ATC gear if the coach did not have it's own pick-up gear.

OzzyO.

Hi All

Here's the loco with the added fitting so far, because I've cropped them they do look a bit cruel, hence the thumbnails. I forgot to mention that the buffers are from Warren Shepard.


The brackets I used devcon to fix them to the BB but it doesn't look as though I got them that straight. The main casting on the front BB was bent from the sprue but in case I broke it trying to straighten it I left it as it was.

The rest of the part are soldered with the exception of the rear JB on the BB this was also fixed with devcon.
I chose to use the Springside boxes over the PR ones as they have more detail hindges on the top were as the PR ones are just a smaller square block, see the link to them above.

Dave

OzzyO said:

Hello David,

looking at this photo of the 14xx

Looking at the connector on the left as we see the photo, it looks to be a "standard" RCH coach electrical connector normally used for coach lighting. But in this case IIRC it was used for a bell code for the fireman to adjust the cut-off of the loco. If this is the case the RCH connector could be used as it's so low down it could not be connected to the lighting circuit.

About the only other thing that it could be for would be for the ATC gear if the coach did not have it's own pick-up gear.

OzzyO.

Click to expand...

Hi Paul

I agree with you it does look like the cable goes up into the cab to the bell, but if you look at the full photo of 1466 just in front of the tank there is another cable coming up over the running plate through a JB and then continues up over the tank heading for the cab front? But would this bell cable be the same on a 64xx?

Dave

Dave,
Sorry, you've suddenly lost me, I think I know what/who a PR is (Pete Roles), but who or what are BB and JB?
Steph

Steph Dale said:

Dave,
Sorry, you've suddenly lost me, I think I know what/who a PR is (Pete Roles), but who or what are BB and JB?
Steph

Click to expand...

Hi Steph

Sorry for the confusion BB is buffer beam and JB is junction box, usually I put the full spelling once, than after wards abbreviate further occurrences.
Peter Roles was mentioned earlier but having checked BB JB were not!

Dave

I've just found in my photo library more photos of 6430 on the Lincs Wolds Rly, saved for a later date for modelling which I didn't realise I had.



So now we have the underneath of both a 64xx and a 14xx
Having watched a U tube video last night on the 14xx I now know that the 14xx were all originally 48xx and only changed in 1946 so as to allow some of the 28xxs that were converted to oil burning to have new numbers. I do have a Springside 14xx which looks like I now need to change to a 48xx as my period is the 1930s and add auto fittings.

From these photos you can see where flanges were fitted and the second photo shows how the cable is connected to the rear electric box.

Dave

Having looked through the photos in Pannier Papers No.7 (54/64/74s) several times I now believe that the second cable under the running plate does go to the bell in the cab, Paul H helped to confirm this. So that is what I'm doing with my 64xx. Yesterday I added the box onto the front buffer beam and then continued round and along the running plate and onto the rear box on the rear BB. I still have to fit some sort of brackets to support the wires running along the running plate yet and to fit the steam and vacuum pipes.

Does anyone know what the scale size for these would be?




The wire sticking up in the second photo is just to show where eventually the one to go up the cab side starts off from, also in this photo the second small block just behind the steps will have a wire going down the battery boxes that will be fixed to the chassis shortly.

For those who haven't seen in the cab of a Auto Coach and some who have one and may one day like to add cab detail here's a photo of AC 163 cab.

Hello David,

IIRC the pipe sizes were 3" for vacuum pipes and 2" for the steam heat pipes, but at this time the pipes would have been BSPT (British standard pipe threads) so the O/D would have been bigger as the pipe size is the I/D.
3" BSPT. O/D 3.460" to top of thread so the pipe could have been 3 1/2" scale size 1.75mm
2" BSPT. O/D 2.347" to top of thread so the pipe could have been 2 3/8" scale size 1.4mm.

OzzyO.

OzzyO said:

Hello David,

IIRC the pipe sizes were 3" for vacuum pipes and 2" for the steam heat pipes, but at this time the pipes would have been BSPT (British standard pipe threads) so the O/D would have been bigger as the pipe size is the I/D.
3" BSPT. O/D 3.460" to top of thread so the pipe could have been 3 1/2" scale size 1.75mm
2" BSPT. O/D 2.347" to top of thread so the pipe could have been 2 3/8" scale size 1.4mm.

OzzyO.

Click to expand...

Thanks Paul

I shall have to find some suitable thick wire or tube.

Dave