hobbyhorse Posted July 31, 2019 Author Share Posted July 31, 2019 This week it's cab sheeting time. The lower cab consists of three sections, two sides and the back. The back section was made in one piece, and using the hand shaper to groove the fold lines, this ensured two crisp bends. The sides used the bottom fixings as a template for the bends. The top rails on the full size loco used a slightly rounded top, so once soldered on the top was rounded with files. I've not rounded off the rails on one loco as the tall cab will rest onto it. One tricky job was machining a notch into some 2mm nickel silver rod, these form the vertical hand rails that allow the side sheets to fit into, on the prototype we use tubes. And lastly was fitting the angle around the bottom of the cab footplate. Next job is the two chimneys which are both different. Simon 2 4 Link to post Share on other sites More sharing options...
hobbyhorse Posted August 8, 2019 Author Share Posted August 8, 2019 This week I've been working on the chimneys, it's one of the things I really enjoy making. Using various jigs and tools speeds up producing them. The shorter chimney was the easiest one to make because I've got the works drawings, but the taller one just relies on some notes and a few photos. The reason for the taller chimney was because of a visit we made to the Linton & Barnstable line, shortly after finishing the restoration. The weather at the line was extremely wet and windy, so the decision to fit an enclosed cab and tall chimney was taken. We used the original base but cut off the tapered top, replacing it with a tube which came from a lamp post, and fitting a top which one of us had. 1 6 Link to post Share on other sites More sharing options...
hobbyhorse Posted August 18, 2019 Author Share Posted August 18, 2019 Concentrating this week on the smokebox door, it's fixings and some of the smaller details around the smokebox. Also soldered the chimney bases to the smokebox. Just got to make the darts which will hold the doors on. 1 4 Link to post Share on other sites More sharing options...
hobbyhorse Posted August 22, 2019 Author Share Posted August 22, 2019 I've been putting off making the safety valves for a while, but bit the bullet this week. After deliberating which way to make them, I decided to follow the prototype exactly which meant some quite small parts, especially the buckle at the pivoting end of the valve. In the end I made the actual valve drop into the housing, this gives the correct shape to the valve tops. The rest of the part are straightforward machined parts, except the springs which took the longest to make. The cover plates have also been made, but not fitted yet as I need to make the handrail knobs that hold it down, which is the next job. Lastly the couplings have been fitted to the front plates. Simon 1 5 Link to post Share on other sites More sharing options...
hobbyhorse Posted September 28, 2019 Author Share Posted September 28, 2019 Back on the build after a short holiday. Lots of bits manufactured for the brakes and boiler expansion plates. I'm still pondering how to make the handrail knobs for the safety valve cover plates, but I've got an idea so just need to make some form tools. Simon 2 3 Link to post Share on other sites More sharing options...
hobbyhorse Posted October 1, 2019 Author Share Posted October 1, 2019 Putting the various brake and expansion plates onto the models was fairly quick, what took a bit of time was making 50 dummy bolts for detailing the chassis. That's it for a while as I'm going to be doing some work on my ON30 layout. Simon 2 5 Link to post Share on other sites More sharing options...
Scale7JB Posted October 1, 2019 Share Posted October 1, 2019 Gosh, they're good, Simon ! JB. 1 Link to post Share on other sites More sharing options...
hobbyhorse Posted January 11, 2020 Author Share Posted January 11, 2020 I've been putting off starting the crosshead as I wasn't sure of the the best way to accurately make them. After a lot of thought and a day on the drawing board a plan evolved. The top section that fits around the slide bar was made on the mill with the slot for the slide bar and a small raised section that fits in side the bottom section. The bottom section used the mill for the basic sizes and then profile milled for the shape, lastly it was slotted to accept the con rod. This was soldered together accurately with only a small amount of filling to align with the piston rod. The con rod was was profile milled on both faces and after some filling was fitted with the lubricator. The small end of the con rod is held in place in the crosshead with the small hex fitting, and the large end with a representation of the cotter fitting. Simon 4 2 Link to post Share on other sites More sharing options...
hobbyhorse Posted January 23, 2020 Author Share Posted January 23, 2020 Spent sometime this week on he cab extension, some tricky folding required to match the lower cab. 4 1 Link to post Share on other sites More sharing options...
hobbyhorse Posted January 23, 2020 Author Share Posted January 23, 2020 Some more on making the cab. 3 Link to post Share on other sites More sharing options...
Scale7JB Posted January 23, 2020 Share Posted January 23, 2020 Magnificent! Cant wait to have the space to and tools to try something similar. JB. Link to post Share on other sites More sharing options...
hobbyhorse Posted April 22, 2020 Author Share Posted April 22, 2020 The next stage in the construction is to complete all the bits inside the frames, so starting with the valve gear and valve chests. Completing these entailed quite a bit of work over several months, but very enjoyable when done in stages especially when machining the very small dummy bolts and nuts. That's another job ticked off, texted the springs. Simon 1 4 Link to post Share on other sites More sharing options...
hobbyhorse Posted May 18, 2020 Author Share Posted May 18, 2020 After doing some stuff on the ON30 layout it's back to Darent, with the springs. Normally I not the greatest fan of making springs, as it was part of the day job a while ago, but these I have enjoyed. Started by making the assembly jig and new anvil for the rivet punch to enable the brass angle to be riveted. All 8 springs are the same, the only difference is in the angle brackets. That's another job ticked off for the bits inside the frames, next the derail protection bars. Simon 3 Link to post Share on other sites More sharing options...
hobbyhorse Posted January 9, 2021 Author Share Posted January 9, 2021 I've been scratching my head for a while about making the hand rail stanchions, luckily Darent doesn't have many only for the safety valves. So after sourcing some brass balls of the correct diameter, the fun started. First a jig was made to hold the ball and the rod, the balls needed drilling twice, once to get the hole for the rod and then again when the rod was soldered on. Before drilling the balls needed softening as those supplied were in hard condition, the blow torch sorted that out. A small washer was turned and the end of the bars threaded, then attached to the models. I did have some wastage drilling the balls but its easy with the jig to redo so more. Next will be the cylinder front covers and derailing bars. Simon 3 3 Link to post Share on other sites More sharing options...
hobbyhorse Posted February 20, 2021 Author Share Posted February 20, 2021 I’ve been putting off doing the reversers as it has required quite a bit of effort with the parts required for them. First on the list was to do a drawing to produce the patterns for the links, arms, bases and handles, then cut these on the pantograph. With these most of the bits have been silver soldered, as this provides invisible joints once cleaned up and stronger. Not fitted them yet as I’m doing everything that’s required inside the frames to be completed, then stripe down the frames and fit them everything in one go, anyway thats another bit ticked off the list. Simon 3 3 Link to post Share on other sites More sharing options...
hobbyhorse Posted August 28, 2021 Author Share Posted August 28, 2021 It's been a while but I've been thinking about how to manufacture the clack valves. Other than the hand wheels which took the longest to make everything else was straight forward. Next on the list is the injectors. Simon 1 4 Link to post Share on other sites More sharing options...
hobbyhorse Posted October 21, 2021 Author Share Posted October 21, 2021 Good Bye, Simon 3 Link to post Share on other sites More sharing options...
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