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Posts posted by Ian Major
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Tempus Fugit! Well, like most people, I have been rather distracted by other things, including a spell in hospital (not COVID related). It was time to get a grip and do more work on the second "B".
The brake guard was made from a piece of 1.5 x 1.5mm brass angle and some 1.5mm N/S strip.
The angle was filed to represent the teeth of the ratchet and (what would become) the upper end was bent over at 90 degrees. The resultant tab was later soldered to the underside of the solebar.
The strip I bent at 90 degrees 25mm from the end. The angle was then soldered to this using 202 degree solder.
The 25mm tail was adjusted so that it was at 45 degrees to the the ratchet and a 2mm length at the end was bent to form a tab. This was later soldered to the underside of the wagon floor.
The longer part of the strip was bent and cut to length to represent the guard. This end was later soldered to the upper surface of the solebar lower flange.
The assembly was soldered in place using 145 degree solder. The bracing is a bit wavy in the photo. i later sorted it. I then sorted it a second time after I managed to bend the guard whilst doing other work. Much use of Anglo Saxon language was involved.
Strictly, the bracing should be made from angle. I am hoping this wont to be too obvious an omission when it is finally painted black!
The kit supplied lever that was displaced by the DC brake gear on the first Macaw was added ...
... and the vertical part of the brake guard was made from a short length of the 1.5mm strip with pressed rivet detail. This was soldered on to the face of the solebar. I originally tried to make this latter part by folding it as part of the main piece of strip but the result looked naff. It was much easier as separate parts.
This was repeated on the other side.
To finish off the soldering I ran 70 degree solder along the top edges of the sides to hide the join. This was dressed with files and emery paper to leave a smooth finish.
Having set the ride height using packing, I cut the excess length off the bolts that protruded through the floor. With the bolts permanently fitted I dressed their ends to be flush with the floor.
Most of the remaining construction work is to attach the castings. I am short of a couple of buffer rams/heads having run out of suitable steel stock in which to turn them. I will have to have a trip to MACC Models.
Ian.
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Have a look at the photos of Wixford station on the Warwickshire Railways site:-
https://www.warwickshirerailways.com/lms/mrwix587.htm
The shots of the small yard include the portable loading ramp for livestock.
BTW Wixford was the next station north from Broome Junction.
Ian.
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George,
I like your idea of a small diesel depot.
This could include a small roofless ex steam shed housing the diesels. You could go to town on its internal detail with everything on show.
The possibilities are limitless!
Ian.
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John,
Back in 2013 the Stanier Mogul got off the rails all wheels on the GCR. See here.
At least on our 7mm railways we only suffer blushes.
Ian.
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Excellent stuff John.
I should be picking up a couple of 5ft(ish) boards next week. At long last I will be making my own small layout. I intend to build my own track so I am taking inspiration and pointers (or is it points) from your work.
Reading your last entry I had to permit myself a chuckle. In your July entry you highlighted the existence of the catch/trap/whatever point, then ran through it recently. I mean really. You can't get the staff you know.
Still, hands up anyone who hasn't done that. Not many I don't suppose.
Ian.
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Beautifully executed James.
I understand the use of the cotton buds, but I am intrigued by the set of miniature bottle cleaners sat there. I have an identical set for cleaning my airbrush. I guess you use them that way, since the wagon is sat in your spray booth. But do you use them for any other (paint related) purpose or are they simply there conveniently for the airbrush.
I look forward to more photos.
Ian.
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Hendie,
Good to hear from you again.
You have received some fabulous artifacts there. In a world where there are many evil things going on it is wonderful to have people like Andrew to help restore one's faith in human nature.
I look forward to more developments.
Ian.
PS I agree with Keith. The curtain does look a bit like underwear after their journey. Still, with a bit of ironing and pleating it will be back to its former glory I am sure.
PPS How is the aircraft modelling doing?
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Cor, you will be as drunk as a skunk with all that Isopropyl around.
Those GUVs are looking good. Nice work. Looking forward to seeing them finished and of course in the flesh.
Ian.
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John,
That is a fabulous piece of work. I take it that you have placed them between the steps up to the (future) bridge and the main building. Do you have an arrangement of buildings in mind or are you in experimental stage?
I am looking forward to the results.
Ian.
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Oh dear I missed your birthday. I would have let you buy me a pint if I had known.
Ian.
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George,
I agree with Andrew. It looks superb.
Ian.
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The next step was to fit the first of the diagonal truss parts. I removed the 'V's at that end and reduced them to the correct height. I used a piece of metric graph paper to make sure I was taking the legs down evenly. I didn't want a "leaning Tower of Pisa" effect.
When I was happy with its height I fitted it in front of the diagonal bracing. It looks much better now.
The next view shows the first diagonal on the right. I have fixed a packing piece between the brace and solebar. The join at the queen post was also a bit weak so I spanned it with a piece of 0.5mm wire - it acts as a sort of fishplate.
As can be seen the inner bracing would have fouled the bogie mounting.
To handle this problem I added an extra cross piece using the same brass channel as the solebars. After adding the second outer diagonal truss I wedged the new cross piece under the two diagonals, then when the inner diagonals were added they were simply fixed to the cross piece and cut short of the bogie mounting.
I made a boo boo with the cross pieces. I mounted them with their webbing facing the buffer beams. I should have mounted them with the flanges towards the buffer beams. If I need to cut recesses in the cross pieces to clear the wheel flanges it is a bigger job cutting the webbing rather than the flanges. Sadly I had already fitted all the diagonals before picking this up. My forward planning capability is obviously fading.
At this point I fitted the bogies and their mountings. I also added the bogie kit supplied spacers. This was to check nothing clashed, check the ride height plus seeing it on its wheels helps my motivation!
The next photo shows the new B next to the first B. The new B is standing about 1mm high. The kit supplied spacers are 1.5mm thick, so I will use my cutter to create some 10thou spacers from plastic - a quick job.
The photo also makes an interesting profile comparison between the old Connoisseur plate bogies (on the right) and the new ones. I think Jim's latest bogies look superb, and I haven't fitted the brakes yet.
Whilst I was doing this I checked how far the bogies would swing before fouling any part of the body. It turned out to be 15 degrees. Now knowing the distance between the bogie centres and using my school Trigonometry I calculated my new B would be able to negotiate a curve of radius slightly less than 2ft. Though when I lower the body by one mm to correct the ride height this will reduce the wheel clearance so I will recalculate when the wagon is finished but before painting - in case I need to attack those cross pieces.
I have a little more work on the trussing then it is adding the brake levers and making the ratchets for them. These will conclude the soldering work. The white metal detail will be glued on.
Ian.
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Ade,
Your trees are developing a lovely country station feel. I fear though the picture of the small prairie will need moving up the wall a bit before it disappears into the vegetation.
Ian.
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Very nice Rob, it looks as though the lid should open.
You seem to be enjoying using your mill and lathe - they are addictive.
Ian.
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Thank you for all the likes guys.
Well - the sheet hooks are made and fitted, only 20 on this one!
I have started on the trussing which I am making from 2 x 2mm brass angle. First were the 8 queenposts.
Then I fitted the outer horizontal parts and the cross bracing. Much checking of things being square etc. I also fitted the brake "V" hangers. I found out from the previous MACAWs that it was easier fit them at this stage rather than later. I used the kit supplied hangers that were displaced by my scratch built DC brakes on the first B.
Next on were the inner horizontal parts.
Then I started to measure up for the diagonal bracing. This revealed two issues - one predicted, one not.
The issue that I predicted was that the bogie mountings having to be attached fore and aft occupy the area where the inner diagonal bracing needs to be fixed. I should be able to secure them with some deep brackets.
The other issue is that the "V" hangers from the kit are a scale 4 inches too tall, about 2mm. My intention is to surreptitiously give additional support to the diagonal bracing by attaching it to the brake cross shafts. So the "V"s have to be the right height. This I should have spotted before fitting them.
This is a detail of the MACAW B at Didcot showing how close the brake shaft is to the diagonal trussing.
I will take the "V"s back off and reduce their height and hopefully make progress from there.
Ian.
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Simon,
That is a very elegant arrangement with the Tortoise, not at all crude. I think I might steal the idea!
Ian.
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Rod,
I don't think "organic" can be used to differentiate between engineering and artistic minds - I speak as a retired engineer whose mind is so organic it is positively composting with old age.
For me, the advantages of "frog juicers" over electro-mechanical switching is down to reliability and zero requirement for mechanical adjustment. You can get poor electronic circuits but once you weed the duffers out they generally just run and run (witness the Voyager 1 space probe success). I used to look after the electrics of the NECG0G test track electrics. The electro-mechanical switches were a constant source of unwanted work.
"Frog juicers" are obviously no use if you wish to alternate between DC and DCC running.
Ian.
PS I am still jealous of your layout - in the nicest possible way.
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I had a problem with my Cameo 4 auto blade end cap and thought it worth sharing the experience.
I was going to cut a part in plastic sheet but first decided to check my design on cheap card (Cornflake box). My cutting mat is not as sticky as it had been so I taped the ends of the card but not the sides. Part way through cutting, the side nearest the mat edge popped up mid cut. The edge of the card lined up perfectly with the end cap. Cue cogging noises. I threw 6 and started again but the blade was no longer cutting properly.
A quick examination showed the removable end cap thread was broken.
Closer inspection showed the cap surround was also split.
Whilst ordering a replacement blade, I noticed on a certain auction site packs of 4 replacement caps <link> at £4 a pack plus £2 p & p. I decided to get a pack more in hope than expectation.
When it arrived I found each part was a combination of the removable cap and the outer surround. It is far more robust than the original.
I had removed the original surround by carefully prising it out. It was held in by 3 clips.
The new cap fitted without any problem having made sure its 3 tangential slots lined up with the 3 retaining clips. I tested it by manually setting/resetting the blade depth. All fine.
I gave it a whizz on the Kellog special and all was well.
I also cut the plastic part out without any problem or loss of accuracy.
I think this end cap will last. It was certainly a lot cheaper than a whole new blade.
Not being able to unscrew the end cap could cause problems cleaning dust out of the blade - I would have you use a vacuum cleaner. It would also be a challenge to remove it from the cutter since the removable end cap allows access to the three retaining clips. I suspect it would have to be trepanned.
I noticed on the web page for the part there is (or was) a small photo...
It would appear my experience is not unique.
The Cameo 4 has more grunt than the previous cutters. It appears the cap on the auto blade 4 is not up to handling this increased stress.
Ian.
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George,
Your fencing is very effective. I especially like its combination with the GUV in close up.
I am confident you will have the M/N up and running in no time.
Ian.
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Thank you for the likes. They are very encouraging and help me to make progress.
I started on the bogie mountings. The bogie kit supplies a mounting that sits fore and aft. There is no advice in the instructions on how to attach it to the wagon body. The mounting has clearance holes for 6BA nuts/bolts.
A spacer the same shape is supplied to help raise the wagon to the correct ride height. The question was how to screw a 6BA in to the thin metal of the floor. There would not be enough "meat" to take a 6BA thread.Looking in my stock of metal I found 1.6mm thick NS strip. I had bought this for a project though I can't remember for the life of me what it was. I cut two rounded corner lozenge shapes the same size as the mountings.
I drilled them with 2 off 1mm holes to match those in the floor.
These were then soldered to the under side of the floor using the 1mm holes to line them up. At this point I had decided to use 8BA studding or bolts to attach the mountings. I drilled out the 4 holes to 1.8mm then tapped them 8BA as shown in the next photo. The thickness of material gives several turns of 8BA thread so it is secure.
The cylinder of steel is a simple turning with a hole bored down the centre to give a sliding fit for the tap. The cylinder holds the tap vertical to the hole giving the best chance of getting a good thread. It also stops any side to side movement which would risk breaking the tap.
The next photo shows the cylinder alongside the tap. Nothing complicated and it was not my idea, I got it from a Stan Bray model engineering book.
I then tried fitting the mounting. My original plan was to use studding soldered in to the tapped hole with nuts holding the mounting in place. However, it was a right faff trying to tighten the nuts within the recesses in the mountings. Tightening also tended to knock the mountings out of line. So I opted for pan head bolts. At the moment the bolts stick proud of the topside of the floor.
When I have set the ride height (the more packing needed the longer the bolts) I will shorten them to be a flush fit then secure it all with thread lock - but not until I have fitted the trusses and brakes.Another job to complete was the false floor. I wasn't happy with the one end. So I cut it back to where the first bolster would be and knocked up a design for a fresh end bit using Inkscape. This I threw at my Silhouette cutter which promptly split the blade's end cap. I will document these trials and tribulations else where. Suffice to say, I have now fixed it and cut out the fresh end.
With that done I was then in a position to solder on the remaining bolster support brackets using the false floor as a guide (not in place when soldering obviously
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The join between the two false floor parts coincides with plank edges.
Belt and braces! The join also sits under the end bolster rather nicely.
Next is fitting sheet hooks, the trussing and the brake rigging.
Meanwhile, my MERG bits and pieces have arrived so I will be alternating between this project and soldering components on to blank PCBs. And people wonder why I walk in circles around the village talking to myself.
Ian.
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Fantastic.
Ian.
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George,
As always, your buildings are looking superb.
I think you need to breathalyze that bus driver though or at the very least get his eyesight tested.
Ian.
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Good to see progress on Chucksbry.
Ian M.
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I'm still breathing.
Firstly, my thanks for the likes and the support from "the Poynton Crew". In particular I must thank Dave (Daifly) who, via PM, drew my attention to a clear 1930s photo of a loaded MACAW B on EBAY (the photo that is, not the MACAW). The subsequent discussion between us was very informative.
I have a had a few things on the go recently. These include many Zoom sessions with the family. My eldest grandson (11 years) loves to set quizzes with Kahoot then fire them at us in one of the Zoom sessions. He decided to make it easy on me by setting a quiz on the Ffestiniog Railway.
I failed miserably.Well I took the plunge and bought myself a Minerva pannier tank and here it is:
I will get some plates for it. It also needs an ashpan fabricating and generally toned down. There were a few minor issues. When I took the photo, I thought a spider had decided to decorate the smokebox door. This actually turned out to be glue strings from the manufacturing process. There were others around the chassis. All were easily dealt with.
I am going to give it a good run to make sure all is well before mucking it about.
I have also joined MERG which will help me make a DCC controller for the loco - then a shunting layout and then ...
Meanwhile, the second "B" is progressing.
I made up the frames from 6 x 2mm brass channel. I had some spare 6 x 3mm channel which I used for internal cross bracing. The latter will support the inner queen posts. I made a crude wooden jig to keep it all in line, straight and square whilst I soldered it up.
The solebar overlays were those displaced from the "B" kit by the others I had made to suit the DC brake layout.
The floor pan was cut from 0.25mm NS sheet in three parts. The joins were arranged to lie on top of the cross bracing.
The sides were made from 6 x 0.25mm strip with 0.8mm dia wire soldered along the top edge to represent the bulb profile.
The vertical bracing/bolster supports were made from 2 x 2mm brass angle. In the photo below, the end ones have been left off until after the frame and floor pan are soldered together.
The four 1mm holes along the centre line of the floor are pilots for the bogie support fixings. These will be enlarged once I decide exactly how I am going to attach the fixings.
The plastic piece in the background is the representation of the floor planking. For some reason, one end of it is completely out of square. How I managed that I don't know. I will cut that end off and splice on a new piece with the join under the end bolster.
I soldered the frame and the floor together. Amazingly they fitted together perfectly.
Next to try the ride height (and for a bit of fun) I put the assembly on to the bogies and their supports. Even with the spacer that Jim supplies with the bogie kit, the ride is about 2mm too low. This is fine by me. It gives me room to add a thick plate on the underside of the floor at each end. These can be drilled and tapped to take fixing studs for the bogie mountings.
Starting to look the part.
Next job will be to make the bogie mountings - and order bits for the DCC controller.
Ian.
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Ian M's 7mm workbench - Back to the MACAW B.
in Kitbuilding & Scratchbuilding
Posted
A quick update.
All the castings fitted. Construction is now complete except for the two buffer rams/heads.
When the weather improves the "B" will be moved to the paint shop.
In the meantime I will revisit some other projects.
Ian.