firefabric

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  1. firefabric

    [MOC] Jeep CJ-7 Renegade

    Finished another MOC, the Jeep CJ-7 Renegade. This build is on the smaller side, at least compared to the previous post (Sierra Railway Locomotive), but it was an interesting build nevertheless. Since it was inspired by a scene in Back to the Future, I'm posting this in the Licensed forum as it could theoretically be a "movie car". A well-informed Back to the Future fan can probably tell which scene I'm talking about: It's done in the 8-wide format, however being a smaller car in size, I felt like the chassis should be a bit smaller so I did some experiments to make it 7-wide. I wanted to use the larger and wider front wheel arches to match the real car, but since those are wider than the rear wheel arches (1 stud), I needed to make the chassis 6-wide in the front. I tried a few different ways, but the only thing that really worked was to build the front and and back of the chassis as separate parts and join them with a half-stud offset. Another detail to note is that the front grille and lights attachment is built upside down, mainly due to medium blue parts availability. But as it happens sometimes, I feel like it turned out better having those constraints. Other than that, the structure is fairly normal and built using mainly plates. No large chassis pieces were used, I do try those out at least once in a build, but so far there has always been some limitation or issue and haven't been able to use them. As usual, I also created instructions, if you are interested there's more information about that on Rebrickable: https://rebrickable.com/mocs/MOC-135181/firefabric/jeep-cj-7/ Thanks!
  2. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thank you, I'm happy to hear that! Yes I also like how it turned out, because initially when I started I had no idea if I would be able to realize what I had in mind (especially in real bricks so that it would actually function properly). And I have to say I'm also surprised how well it has been received, thank you again for all the support, it's much appreciated!
  3. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thank you! Thank you! Thanks, happy to hear you like it!
  4. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thank you for the compliment! This is indeed my first train, but I have to say I've been following the train builds here (and elsewhere) with interest for quite some time and the ideas have been brewing up in the meantime. I also seem to enjoy doing things in an incremental way, there was quite a lot of testing and trying different setups until I even got to a level where the locomotive would actually be kind enough to move properly...
  5. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thank you! Thanks, much appreciated! I tried to include all the details which kind of stand out on the real locomotive to give it a similar overall look, but also left out many smaller details to keep it simpler. The lights were more or less the only solution I could think of, but in the end it actually turned out looking quite nice. Thanks! Looking at your signature image, I need to mention the Sierra Locomotive is actually currently sitting on the shelf next to the 7740 with its extra sleeper and postal wagons!
  6. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thanks again for the kind words! I have to say I'm quite surprised I actually got it working at all, I had some ideas but wasn't sure if they would be any good in reality. Needless to say there was also quite a few different versions of the mechanisms and test setups to figure out why things that seemed obvious didn't actually work... And wow I didn't notice it's on the front page now, thanks for the heads up! And of course thank you to the Eurobricks moderators for the acknowledgement!
  7. Really nicely done! It's an unusual subject but that's a good thing, it doesn't have to be a supercar to look cool. Very clean build and looks pleasing, excellent work!
  8. firefabric

    [MOC] Sierra Railway No. 3 Locomotive

    Thanks! Thank you! I actually wanted to print the "It's a science experiment!" line on the side of the diorama the same way they do nowadays in the official Lego diorama sets! Yes this was my first train MOC, I've been wanting to make one ever since I started building more MOCs so I've been trying to gather the knowledge and guts to try it out...
  9. Hello, I finished my latest MOC, the Sierra Railway No. 3 Locomotive a.k.a. the Central Pacific Railroad Locomotive 131 (known from Back to the Future Part III). This is my first train MOC, I've mainly stuck to making cars so far as they have been a bit easier subjects but as a long time Lego Trains fan (7740 being my all-time favorite Lego set and my prized possession) a train MOC has been high on my wanted list. I chose the Sierra Railway No. 3 Locomotive as my subject as I like steam locomotives, and in my mind the looks of the No. 3 is more or less the exact definition of a classic steam locomotive. It's also a bit smaller in size compared to later steam locomotives, so after some initial sketches and trials I felt it would be well suited to build in 8-wide scale. It was a fairly long process to complete, I had the basic knowledge of Lego trains but had to study quite a bit and learn about the pitfalls of Lego steam locomotives especially. I wanted to use the Powered Up components to motorize it, and initially I settled on the idea to take the "easy route" and have a regular train motor and battery box in the tender, as it would be the reasonable thing to do. However, after some trials I quickly realized it's not going to work, the axle spacing and the general look of the tender was not compatible with the train motor. Then I considered using the train motor as the front bogey of the locomotive, but it didn't really match that either and moreover, the battery box would not have fitted into the boiler above the front bogey to give the traction needed. All these things you more experienced train builders would have probably been able to tell me straight ahead... So I was left with the solution of installing a PU Technic L-motor and the battery box directly into the chassis of the locomotive and make the big main wheels driven. With that, I also chose to make the cab and boiler detachable from the chassis to be able to change the battery. That setup also needed quite a lot of testing with different options to figure out what kind of wheel base and configuration I can use so that the train will still be able to go through the curved Lego tracks. Turns out as you increase the wheel base, the friction starts increasing surprisingly quickly. So I settled with the configuration as seen in the pictures, which I think is the maximum to have the train still run reasonably well. It already slows down a little in the curves like this, but it's not too bad yet so I felt it was a decent compromise between looks and function. One challenge was also creating the gearbox and the connecting rods for the wheels, I experimented with many different ways with having the motor drive connected to one set of driving wheels and the liftarm connection rods driving the rest of the wheels. I suppose you already know that it didn't work at all in Lego form, seemed to be mainly caused by the fair amount of play in the liftarm pin connections. So the solution that finally worked well was to couple all three axles with gears so they rotate synchronized, and have the connection rod as a "display piece". That also enabled me to use the tehcnic axles instead of liftarms (the connections won't come off), which I felt looked better. The piston rod is still a liftarm, and it's connected to the front driving wheel instead of the middle like in the real locomotive, but that I accepted as a compromise I can make due "Lego limitations"... I wanted to use regular Lego parts at least for now for my first train build, so I wanted to keep it relatively simple. At some point of the build I realized that if I have it motorized, why not lighted as well, and there is another port in the battery hub to add the PU light. However, it had 2 lights and I only needed one above the boiler in the front, so had to figure out where to hide the other light. So out of necessity became an idea to attach the other light to the other end of the boiler to mimic the glow from the fire burning in the furnace of the boiler. That worked out quite nicely, but mostly by accident... The only problem with the light is that there doesn't seem to be a way to control it perfectly; when using the regular remote it can be switched on/off but the motor is also only on/off, which works but it's not very convenient. When using the Lego app (for the Crocodile Locomotive) the motor can be run with different speeds but there is no button for a light. So might need to look into creating some simple control app myself at some point. I experimented with different gear ratios for the Technic L-motor, but in the end I found using 1:1 ratio seemed to be optimal. It's the same ratio as used in the Crocodile Locomotive, so this one is also not very fast. But on the other hand it gives a fair amount of torque which also helps in keeping the locomotive going around the curves with minimal speed loss, and it can pull at least a few cars without major issues. I created a small video to show how it goes around the corners: https://www.youtube.com/watch?v=QSolg3vHgTQ And finally, I of course had to make a small diorama after changing the decals to the Central Pacific Railroad 131 version, it's very simple for now but maybe I'll try to make some enhancements at some point later on: It was quite a challenging project overall but I enjoyed building it quite a bit and finding out many new things about Lego trains in general. I will probably look into making some train cars for it as well at some point but no concrete plans yet. I also enjoy creating instructions for some builds I make, for this I initially thought I probably won't make them as it would be quite a lot of work due to the size and piece count (948). But in the end I decided to try it out anyway, and yes It was a fair amount of work but I had quite a lot of fun, it's a bit like pretending making a set (with much much less restrictions than real sets I presume...). You can check out the end result here. Thanks for checking out my train build!
  10. firefabric

    [MOC] McDonnell Douglas F-4J Phantom II

    Really nice! The shape seems to be very accurate which should be quite difficult to achieve in Lego. I have always considered aircraft to be the most difficult subjects to model in Lego, and the official aircraft sets in the past have been great examples of that difficulty... But recently I have seen some really great aircraft MOCs and this definitely is one of those.
  11. firefabric

    [MOC] 1948 Chevrolet Pickup Truck

    Thanks! There is a surprisingly good selection of parts in Sand Green, and it has that vintage color feel. Of course it was also the closest color to the one seen in BTTF... I tried to create some round shapes to get the look and feel of a vintage car, but of course with Lego it's always a choice which way things are rounded, as the parts are more or less curved in only one direction. But on the other hand, that also keeps it looking distinctly "Lego".
  12. I finished another project which was actually mostly completed already last year, but came back to it now and put some finishing touches and created the instructions. Making the instructions takes some extra time but I find it a good way to make a build more "complete", when you need to go through everything with a critical eye and try to remove most questionable structures from the build (hacks, poor choices and "it'll do" type of things). This one is the classic Chevrolet 3100 Pickup Truck, from 1948. I like the design of cars and trucks from that time period the most, and the Chevy pickup is one of my favorites. The build is done mostly with basic system parts like my other cars (no SC baseplate etc) and built with real bricks. It can be done in different colors as well, but I chose the color to match the one seen in Back to the Future (1955 skateboard chase scene), because of course. I'm not completely sure which subtheme to post this is in, but I think the licenced subforum is ok as this would fall under Chevrolet and with some imagination, Back to the Future. More pictures and information on rebrickable: https://rebrickable.com/mocs/MOC-121506/firefabric/1948-chevrolet-3100-pickup-truck/
  13. This is very impressive to say the least. I'm not too familiar with the Lego train gauges etc (yet) but for one, this shows how much of a difference a relatively small size increase from the standard (?) 8-wide scale makes. And when the detail level is taken all the way to 11 (studs), it looks pretty much like the scale model trains. I suppose this can still be considered as minifig scale as I understand it's anywhere between 1/30-1/40 depending on which way you look at the minifig... Is the track some standard model train track? Looks like it's about 7-8 studs wide, and seems to fit the Lego dimensions?
  14. True, and even if there were newer parts, the color selection was quite limited. It's still not comprehensive, but they seem to be releasing parts nowadays in a bigger selection of colors than before. It happened a few times during a build recently that while I was thinking of ways to work around a missing color of a specific part, I saw that the wanted color suddenly became available in a new set. And of course sometimes if you are lucky, the missing part workaround might lead into an even better solution... For me the biggest inspiration was the introduction of 8-wide SC cars, they have just a bit more possibilities in detail and part usage than the previous 6-wide format, yet still remaining minifig scale (or close enough at least).
  15. firefabric

    Cessna 172P

    This is not significant but interesting nonetheless to look at the details... I think for me the main reason for this resembling C152 more is because of the windshied/engine cover (hood) area is proportioned exactly like in a C152. C152 is a significantly smaller aircraft than C172, so the proportional height/size and the rake of the windshield matches the C152 exactly. In a C172 the windshield looks smaller and the hood bigger in proportion. Also the top of the hood in this one is straight from the side view (like in C152) and C172 has a bit of a sloped down hood. And a C152 almost never has wheel pants (covers) whereas C172 almost always does. All that aside, this is the best GA/Cessna model I have seen, I have actually considered making something like this myself every now and then, but wrote the idea off thinking it will never work with Lego... Well done.