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Imanol

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  1. Imanol
    The powercar has a gearing mechanism connected to a standard PU train motor, I tested it with the gearing engaged and disengaged and the results were similar. Part of the problem might be due to the bogie connection to the frame being handled by the motor so it´s not very sturdy. The gearing on the powercar is 1:1. Thank you very much. I think is a somewhat obscure model due to only being 20 of them built and being retired quite early, I´m quite familiar with it as I lived close to one of the last ones that still survives with this livery. I still need to finish the livery angles with stickers to make it look perfect. The angles were quite complex, specially the way the rear surfaces are attached but I think it ended up quite good. I´m missing the cab side angles but it was almost impossible to do it without compromising the rest of the design.
  2. Imanol
    The gearing is the same as the final render that I posted here, to summarize it, it has a 1:1.67 gearing ratio and the model weights closer to 500g (with the battery). I also tried pulling one of the power cars and at some point it was able to pull it but I think the resistance from the motor inside of it was too much and the shunter was struggling. I´m planning at some point to make a test car and add some type of weights to make it resemble the load of one of my passenger car designs and test how it works with it. Something I noticed is that there is no real speed difference between a light movement (without load) and pulling all of the Talgo Cars, the only difference is when trying to start moving.
  3. Imanol
    Thanks, thankfully this project has been very smooth Thanks, it's one of my favourite schemes. It was applied to a lot of trains by Renfe in the mid 80s, at some point I want to do something bigger but the LEGO pieces in those colors are still very limited/expensive Thanks, I was also very surprised, but the cars have metal axles and less wheels than a conventional train so that might help
  4. Imanol
    I´m very happy to announce that the locomotive is finished. It has been a very quick project but I enjoyed it quite a lot. It´s already equipped with the Circuit Cubes motors and I have checked that it moves fine. As always there were some problems with the design but thanks to all my previous mistakes I have the knowledge (and the parts) to solve them. I´m very impressed with the Circuit Cubes motor, I feel that is great for powering a shunting locomotive as they are not very fast but can pull quite a bit of load. It was quite a challenge building it in this scheme but I have to say that I love how good it looks. This is one of the main liveries that Renfe used during the 80s and was applied to mostly passenger equipment and in this case to the locomotive that was used to shunt around the passenger train cars inside the depots. I want to say thank you to you because at first I didn´t realize what was the issue you were pointing at, but then, while the designing the instructions I discovered that to remove the battery or motor I would have to remove the entire hood and cab. I redesigned it to make it possible to just remove the entire side of the hood without needing to touch the cab, only the front windshield needs to be removed. Right now, the only thing left to finish is to print the stickers (and finish designing them) and maybe in the future I will add lights to it. Here are some pictures and a video of it pulling some load: And here is the video, I´m really surprised it was able to pull all of the Talgo cars without much struggle, the only problem is caused by the guiding system of the end cars which requires them to be pulled and pushed at the same time: For now this is all I have, I might also think of building a small MOW wagon to pull around as it fits more than a full modern passenger train. Thanks, for the help Imanol
  5. Imanol
    Thanks, it was very crucial for me to make it work on R40 as right now I don´t have any room for a bigger curve radius. I imagine part of the reason that this train works is because is one stud thinner than yours so every single dimension has been scaled down. Even then, I feel this train is much more comfortable working on bigger curve radius, the overhangs when traversing a curve are quite noticeable. It was for sure not the correct choice for a first project but it gave me two important things, a lot of knowledge and a bin full of spare parts. The Rodal was entirely designed by @Hod Carrier, I just implemented it, but I´m amazed at well it works. I hope that will happen at some point, I think it will look impressive on a full size circuit. For now, I´m thinking of going to some events but only in Spain. Thanks, I need to share the merit with @Hod Carrier which was the one responsible for all of the running mechanism of the cars. With what he has shown me, I´m now able to work on other projects
  6. Imanol
    Since I thought about that I knew it was too easy to be true, and I have found why. The only place to put a gear that could engage the middle axle is the same place occupied by the 1x5 liftarm. And is not possible to add a bevel gear on that axle as it will collide with the 20 tooth gear on top. With this in mind I think I´m going to start working on a final design of the structure and preparing the instructions (I had several bad experiences with S-130 and floating sections).
  7. Imanol
    I still have doubts about that, for now I will add extra gears to the order in case I really need to do it. Thanks for clearing that for me, I was just thinking about how it could be done for a real life mechanism so I didn´t have any real expectations about it working. For now I might start working on a final design as I don´t think the current one has any major concerns
  8. Imanol
    It´s available through ldraw, then you would need to install it in Studio. I used Part Designer and I needed to modify the .dat files (is just text) to correct the path to the different dependencies and then add the connections. They are very useful and they don´t break the stability feature in Studio as many other custom parts do
  9. Imanol
    I already thought of doing that but for what I´ve seen in my other train, a small misalignment of the gear can create a lot of trouble so I will leave as a last option in case the train is underpowered. I have also thought of maybe using some type of o-ring that could slide over a normal bushing but I don´t have any idea if the friction would be enough or if it will just slip forever
  10. Imanol
    If I´m honest I don´t understand the need for blind wheels in this case (correct me if I´m wrong). I have already done a prototype of the wheel setup and I have confirmed that they work fine with a middle swivel axle. The only reason would be if that could allow for more traction but I don´t think it has any friction. At the same time, this train weighs like 0,5 kg so is on the heavier side and having a third full axle might help distributing the weight. The only issue I would love to solve is finding a way to power the middle swivel axle but at this point I think is almost impossible. Imanol
  11. Imanol
    Yeah, the closest is size 5 so I see there is no option. The main problem with bigger wheels is that the support brics won't fit in the middle so I don't think is a good idea as it's going to require a full redesign.
  12. Imanol
    I will just remove one of the walls, either the one that is attached to or the other one. I have a similar setup on my other train as is not a big issue, in fact it will be much easier to remove it. I might need to look at it. The 1st and 2nd axles are secured by liftarms so is not going to be a problem. Regarding the axle distance I don´t really now what to do as I want this train to work the same backwards and forwards so I don´t know if I want to take any chances, the main issue might be moving the motor forward as the battery is already attached only partially due to the front modified grill bricks. I´m aware of the strange axle size on the circuit cube, I have the Studio model with the same axle distance as the real one and it looks fine, in any case, I will look at it thoroughly. At this point I have conflicting ideas as if what @Shiva has mentioned about Blind Drivers of that size works I might want to keep the 5L axle and add another gear to power it. About filing axles, I have already made several 3.5L axles from 8L ones so I have experience on cutting and sanding. For now I will continue working on the design and hopefully getting it closer to a definite desing. Imanol
  13. Imanol started following Renfe 309 Shunting Locomotive powered with Circuit Cubes [WIP] [MOC]
  14. Imanol
    Okay, I´ve been working on the new design and fortunately it was very easy to implement into the previous frame. I was worried that moving the motor backwards would require to make room on the cab for the battery but I was able to just move it to the front: I was also able to found the correct ldraw file for the Bluetooth Battery although it really doesn´t matter. The biggest challenge with this design is making it able to attach to a odd number chassis but I think this solution is strong enough and allows me to keep the same attaching points: Lastly, this design contains a gear ratio of 1:1.67 (from 20 tooth to 12 tooth) which I think is more acceptable: I also overdid the connection for the 20 tooth gear using the 39793 technic connector as this was a big problem on my other train design. I would love if someone is able to spot any problems with the design to please tell me, although I think that this time I did my work. This is all I have for now. Imanol
  15. Imanol
    I thought of that but apparently no one builds them for that size as they are usually used on Steam Locomotives which use bigger size wheels. After thinking carefully I decided to broad my search to include three axle bogies on locomotives and I found some promising leads. There is one design that can be easily adapted onto mine and that the only compromise that it has is that the middle axle is unpowered. It also has a gear reduction but is much more manageable: Bogie 3 axle - with floating mid-axle. From what I´ve seen this is one of the most used solution, usually combined with a 2x2 round plate or tile that acts as a blind driver, although I will prefer keeping a real wheel on the middle axle. I also thought about going back to a more realistic axle layout, but the main problem is that it needs to have the same footprint, as in the front and rear of the locomotive there are two tanks that are 1x2 so the wheels can´t be put behind them. To be honest, the main problem with that layout is that is not technic compatible as it has a wheel offset by 1/2 technic pin so it´s going to be a pain to make a strong frame for that. For now I will try and see how difficult is to implement a 2 axle powered design and see if it might be enough. Thanks, Imanol
  16. Imanol
    I had already thought about using the correct wheel spacing of the real locomotive, but it doesn't work well with the technic frame. The Orient Express uses rods to transmit the power to the other wheels so even if the motor is only connected to one axle, the power is transmited to the other ones. There is ways of using a 1:1 gear ratio inside the frame, the main problem is getting the middle axle to swivel. In anycase, thank you very much for the ideas and the effort. Unfortunately I don't have access to Studio today so until tomorrow I can't test anything Imanol
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