I was able to postpone the cab construction by adding more details to the water tanks. So I added water hatches for the tanks from PVC and ABS plastics.
Another typical detail on such Budapest locos is the location of the water-sucker inside or in front of the smoke boy support. The model was scratch-built from brass.
Also typical is the diagonal pipe running to the top of the water tank. With such details, the water tanks are done as well. Now is no more hiding to get the cab attached.
Finally, I found some issues with my builders plate. Seems there are differences in scale somehow….
Let’s continue with the water tanks of the loco. The basic construction is made from 2 and 3mm styrene. I glued a 0.5mm sheet to the underside, which represents the walkway along the loco tanks. BTW, I decided to model a welded replacement tanks, as many prototype engines got new tanks before the era I like to represent.
The outer shell of the tanks is made form 1.5mm styrene, which got bend to shape first, glues to the base and cut to dimension in the last step. The water tanks are hollow at the front end. Close to the cab, I added lead weights.
Another detail is the handrail running along the top edge as well as the generator. The tanks are rigged permanently wo the boiler by cross braces. The whole super-structure has to be removable in the end.
The last photo gives an impression of the finished loco once the cab is done as well. I still look for clever solutions how to make rounded side-roof-section.
Welcome back to this weeks blog,
as announced last week, I’ll focus on the boiler back-head. Since this is a large scale model, the cab interior will be well visible and needs some decoration as well.
The parts are scratch-built from styrene, brass and wires. For hand wheels, I use brass-castings. The parts for the steam manifold are made on from brass on the lathe.
The steam regulator lever with link-rod was replaced as I didn’t like the first attempt.
For now, the boiler is complete. Let’s see how much of the details will be still visible once the cab is in place. Additional interior parts like Johnson bar, hand brake and more pipework will be added together with the cab floor.
Let’s finish the boiler.
I was looking for cast brass parts to add the water feed valves, but I couldn’t get some. So I finally decided to make them scratch-built from brass. The parts are made on the lathe and I added some cast hand wheels. Looks better than the cast brass parts .
On top of the smoke box, the smokestack was still missing. This part was made from PCV round stock, shaped on the lathe as well and I added some small plastic pieces for final design.
Now the boiler is done except for the back head detail. I added the head light and some more pipes along the boiler. At the chassis, I placed the supports for the water tanks.
And to give a size comparison to my H0n30 fans, the last photo shows small Minitrains Krauss on the cab floor.
Meanwhile, I’m working on the boiler back head detail. I’ll show you the results next week.
Let’s continue with the pipework on the new loco. Below the future cab floor, I mounted two injectors and extended them with the water pipes. While body of the loco has to be removable, I made separate attachments for the water tank outlet valves.
For the cylinders, I made gland pieces to take the in and out steam pipes. I used black Delrin to make them. Bending the pipes was a mess and in case of the inlet pipes, I spend 4 attempts until I was satisfied with the result.
Also in place is the lubricator on the engineer side. As on the prototype, it’s powered by a link coming from the cross head.
Now it’s time to get the RC and electronic parts installed. Battery-Checker, voltage regulator and fuse are placed in the firebox area. The 4S Lipo battery is housed inside the boiler while the Deltang Rx66 is hidden by the white cover on top of the power unit.
So it’s time for some test runs in the garden to get familiar with the future operation side. Afterwards with loco got placed next to my other CFF steam locos on the shelf, waiting for further progress.
Let’s continue the boiler.
I added safety valves to the steam dome, made from brass, screws and nuts.
The steam outlet at the front of the dome is cast brass and bought from Bertram Heyn. I removed the lever and mounted it to the side of the dome as on the prototype I like to model. On the fireman’s side, I added another valve which will supply the water ejector with steam.
The sand dome also got finished. I added sand pipes provided by DMR Reppingen. Both domes are hold in place by screws from the inside of the boiler.
The photos above also show the location of the battery pack inside the boiler. I also started to build the boiler back-head. Therefore, I’m now able to determine the final height of the boiler and create the support for the smokebox next. This part is made from plastic sheet and brass nails as used on the frame.
Step by step, it’s starting to look like a steam locomotive. Actually, I’m working on the steam pipes to the cylinders. More on that next week.
after the short break, I’m back on the Budapest project. I made the domes for the boiler from steel. This may sound wired first, but since I need the space inside for the battery, I’ve to add weight on other places. At least, I had pieces of steel in my scrap box.
The tapered shape of the steam dome is made on the lathe. I made the dome upside down, so I can mill the saddle on the bottom of the dome while holding the piece itself on the remaining stock material.
I milled the bottom in small steps by using a coordinate table. This way, the boring head operation is much easier to handle. I added 0.6mm to the final radius for adding a sheet of brass in between. More on this later.
I used the same setting to drill holes for parts on the steam dome. Once finished, the domes are matching the boiler very well.
Last step in the process is adding pieces of 0.6mm brass sheet. The pieces got annealed and bend to match the boiler shell. After soldering pieces to the domes, I filed them to final shape.
round about 5 years ago, I placed my order for the Resita kit. Right afterwards, I started thinking on how to build matching cars and more important, which prototype model I could choose for my own Resita loco.
The Resita kit arrived in late 2017 and I immediately started the built. But I still had no garden railroad at that time. So, I decided to choose a small operation instead of the bigger networks as Viseu de Sus, Moldovita or Comandau. Finally, I remembered some film scenes of the line at Cimpul Cetatii, so my Resita became CFF 764-467. This brought some additional features, since the loco didn’t hat headlights in later years, so there was no need to model them and I really liked the look of my loco.
Meanwhile, the garden railroad line was built and after selling my Colorado-style trains, I was looking for another CFF loco. As I got a LGB HF110c (Frank S.) by accident, I rebuild her into my Krauss-loco, loosely based on the Oituz loco. I was also thinking about some additions to the Krauss loco and finally build two cars, based on Moldovita prototypes, as they used a Krauss loco as well.
Actually, I built the Budapest loco. This project was already started many month ago by collecting parts and is based on the idea to make a battery powered 0-8-0 from LGB parts. So how about additional cars? My first idea was to build several new cars to accomplish several different CFF lines with plausible and authentic rolling stock. But why so much different topics? Never mind that some of my model are already freelance?
In the end, I spend some more research on my books, made notes for potential and plausible matches to my rooster and how to get all different models united under one railroad operation. But is this really the best way? And would it satisfy me at the end?
To be continued…
with the chassis of the Budapest loco done so far, it’s time to start the boiler. This will make it easier to design the boiler rest on top of the chassis and some other details.
I decided to use a combination of PVC pipe for the boiler with domes and made from steel. This will provide some weight to the loco, but keeps space inside the boiler for batteries and electronics.
The PVC pipe started with 60mm OD and 30mm ID. It was turned to shape on the lathe. Once the outer contures were finished, the rear portion was milled out to take the LiPo battery. I used the same setup to drill the mounting holes for the domes, stack and other parts. This way they are perfect alligned and uprigt on top of the boiler.
The smokebox door was made from scrap pieces. The door itself is turned out of steel wth some styrene pieces and Ozark detail parts. Next week, I might have some progress on the steam dome.
Let’s continue construction on the Budapest project ;-)
It’s time to get the main frame assembled. The sheets for the front and back were made from ABS plastic again by using the same tools and techniques as on the side frames. I added diagonal U-profiles inside the frame to support the couplers, as it’s found on the prototype. BTW, the couplers are the only 3D-printed part on this project.
The rail guards are bent from brass and screwed in place. Now it’s time to add the motor unit and all the rods and valve gear. It took quite a while to get everything running smooth. The outside frame limits the side travel of the wheelsets and at the end, I added 0.5 shim washers to reduce the travel. Due to the limitations, the minimum radius of the chassis is 120cm (4)’ which is still less than the prototypical 150cm it would need.
Beside the changes on the valve gear excentre I showed last week, I made some changes to the link hangers as well, changing the overall look more into Stephenson valve gear. The support arc for the cross head guides are assembled with brass angles.
I also shortened the side rod from the cross head to make everything fit. Now the main chassis is done so far. Many details are still missing, but I look forward for some trial runs. But I’m getting there step by step…