Imanol BB

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About Imanol BB

  • Birthday 05/22/1999

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  1. Imanol BB

    [MOC] Tatra 813 Trial Truck

    Hello, here is a topic about the use of third party tires which are compatible with standard Lego wheels, there are lots of different sizes, shapes and prices: In the case of this model you should look for 1.9" tires that fit the 56mm wheels that this model uses, i'm not sure if it could also work with the 43.2mm wheels and 1.55" tires, some research might give an answer to this; third party tires really give an amazing result in both driving performance and appearance, i hope you can find the one best suited for you and also see some pictures if you get them in the Tatra, good luck.
  2. Imanol BB

    Efferman's Custom Parts

    I am very sad to hear that, those designs of you are really impressive and have a lot of potential, have you ever considering getting your own 3D printer and making the parts by your own?, the printer may cost a lot at first, but it could be more efficient and cheaper for you in the long way, you could directly print, test and sell your parts faster and easier, and all profit would be only for you, it would be really cool
  3. Lego pumps have a check valve placed at their bottom part, since they compress a gas and not a liquid the check valve has to be as close as possible to the piston to avoid the air being compressed inside and not being pumped to the outlet. Maybe there was some kind of leakage in the hoses which caused the problem, and actually when you pump the pumps at different times is much more efficient and smoother than pumping them simultaneously, since you are dividing the power along side the cycle, it's much better to make 50% of the work first and then the other 50% right after that than doing 100% at once, you can use an smaller motor, a more compact arrangement and even run them faster.
  4. Imanol BB

    Limited Slip Differential

    Something i would really like to see is a lunchbox or lock-right differential locker, they work like ratchets which drive the wheels, when going straight both wheels turn together like a normal axle, when cornering the outer wheel has a "free-wheeling" motion and it is able to turn faster than the inner one, in this case all the power goes to the inner wheel so this type of locker can affect the handling of the vehicle in some cases, but that's worth when using it for off-roading, when a wheel loses traction the locker engages and both wheels turn together like a normal locked differential, and it still lets the vehicle steer without the tires rubbing or the axle winding like a fully locked differential.
  5. Imanol BB

    Beamless Chassis Design?

    i'm agree with this, some time ago i made an studded chassis using some brick beams and plates to hold them together, it was 9 studs wide, 50 studs long and about 6 plates tall, the shock absorbers were placed about 35-40 studs apart and the chassis came up to be very strong and robust, and even more compact than a chassis made only of technic beams, and depending of how it is built it can still give a lot of torsional flexibility or stiffness, depending of the need
  6. Hello, i would like to give some information in this topic, one thing we should take into account besides torque (or force) and RPM ( or speed) is power, power is the product of force and speed multiplied, we could say this is the maximum speed at which a maximum force can be applied, there are also limiting factors like peak speed and peak force, one way to imagine this whole thing is like a person is pulling a rope to lift an object, if the object is too heavy and the person can't lift it, it means it's beyond the peak force of the person, and if the object is too light, the person may have plenty of strength and will be able to lift it without a problem, but there will be a point in which he won't be able to lift it faster, even with the object being so light, the body of the person can't produce enough speed and this would be the peak speed, so the peaks are also important, this is why power is so crucial, force and speed can change drastically, but as long as they change proportionally inverted to each other the power will be the same, gears, levers and pulleys are examples of this, you can sacrifice speed in order to get more force or sacrifice force to get more speed, this is why power can mean a lot more than only speed or only force, you can get a very big force or very high speed with a fixed power, but this power is what determines how much of both you can achieve at the same time, the maximum or peak power would be the point in which you are using all of your force and all of your speed and can't increase any of the two even when you are not at their peaks, in the previous example , it would be the point where you are lifting the heaviest object at the maximum speed you can, that's your peak power. Now we know power is important, let's focus on the question, what happens if we add a second motor? if we assume that the second motor has the same speed and force (and hence the same power) of the first motor, and if it's coupled to that one directly without any change in the speed, then we should have twice the power, right?, not necessarily because that will be determined by the whole system, if the first motor was running with no stress but at its peak speed, this means it wasn't producing its maximum power, and if we add the second motor and there is still no stress or force produced, then the speed will be basically the same, the maximum speed the motor design allows but the power hasn't doubled, and you can stack an infinite quantity, of motors in the same manner and they won't increase the speed, however, once we start to make the motors apply a force, and if we achieve the peak power, then at this point adding more motors will increase the power proportionally, so, asking your question, if you add a more motors they will increase the power as long as they are running within their peak torques and speeds, if you have a car with 1 motor going uphill and its producing both peak power and peak torque, adding a second motor should theoretically double the speed, i hope this results useful, i will keep reading about this matter to make sure it is all correct and to give a better explanation if possible.
  7. Imanol BB

    8110 - Unimog - MODs and Improvements

    Hello @Blichew and welcome to Eurobricks, i also own a Unimog and like you i also think that the pneumatic system isn't that great, maybe the use of the V2 Pneumatics could improve the functions of the set, more specifically in the crane of the A-model, but because it is still pneumatically actuated, the inaccuracy and bouncing of the moving parts can still be a problem, the other options is, as you say, a mechanical system, in my opinion something like the system used in the 42054 or 8258 would be useful, the main 3 functions of the cranes of those sets are turntable rotation, main boom elevation and secondary boom elevation, these 3 functions can be powered easily by the PTOs of the Unimog, using the base platform of the 42054 and the boom assembly of the 8258 should look and work properly on the Unimog, at the moment i'm not capable of doing it because i'm pretty busy right now, but i will try to make this idea, at least in LDD, if this idea works it will definitely be a very cool MOD to make this set even better
  8. Imanol BB

    Lifting heavy loads

    The only problem with that design is the pullies resistance and how to attach them, and as far as i know they aren't that much stronger than beams or other bricks.
  9. Imanol BB

    Lifting heavy loads

    Well, i must say i'm impressed, never thought that the hook would take that much weight before breaking, really amazing experiment.
  10. Imanol BB

    Lifting heavy loads

    Of course, you can use them without any problem, i'm glad the design was a success, i hope to see it in action in the video.
  11. Hello everyone, i just saw a video of a very interesting crane similar to this set, there are some pretty cool features which might be a good source of inspiration for modifications, like the 6 wheel arrangement and the removable outriggers modules, i think it would be cool to see something like this made in Lego:
  12. Imanol BB

    [WIP] Rotary Pneumatic valve

    Hi Tommy, i must say this is a very interesting design you are making, this would make pneumatic systems much more compact, as you say, i see there are not exhaust ports, but that could be solved easily, by the way, what about using the first design of the core, but put another air path in the opposite side of the core?, i made an small sketch of this, the round black part with the green paths is the core with the opposed air paths, the blue would be the air inlet port, the yellow the outlet ports and the red would be the exhaust, which could be just a hole in the bottom part of the valve: in this case, 90 degrees of rotation change the air flow from one port to the other, and at the same one port supplied with the pressurized air, the other one has a path for the air to exit; i saw this design in an explanation of how an hydraulic system operates, and it might be helpful for you; all in all, the valve you are designing looks surprisingly good, and i hope you can achieve your goal in a near future, i'll be looking forward to more updates, thanks for sharing it with us.
  13. Imanol BB

    Axle Collection Thread

    Hi, thanks for your interest, i have been working on the axle for quite some time, but sadly i haven't been able to fully recreate the steering system, however this is what I've got so far, i hope it results useful to you: 4Runner IFS.lxf , it would be great to get in touch with the builder behind the model to get a proper view of the whole mechanism, maybe @rm8 could help with that. I also found the original idea, it was shared in this thread by @Paul Boratko, here is the post: @I_Igor Thank you for your interested, actually your portal hubs were an small but good inspiration at the beginning, the only thing i haven't been able to do is fully test this design in real life (), is a bit frustrating, but i have hope in them, i must also say that i love that Unimog you are building, seems really promising. By the Way, if anyone is also interested in the Humvee, i will post newer updates in my "Workshop" topic, in order to avoid filling this thread with only my posts, here is the link:
  14. Hello everyone, has been a while since i uploaded something here, so far i haven't made much progress in the previous models shown before, but since i have a bit more of free time these days i will try to continue, some small updates right now are 3 projects i am currently working on, the first is a concept 8x8x8 Truck, which should use portal and planetary axles which are directly driven by L-Motors and use Xerion Tires,for some reason i thought i had made a post about this project in another thread, but looks like i just dreamed about it , but anyway, here are 2 picture of how it looks so far: The second one is a 12:1 scale Tatra (not sure about which will be the final model), which started just as an axle, but it could become something even better, here is the post about the axle: The third project is a Humvee/Hummer H1 of the same scale of the Tatra, the challenge in this one was mainly because of the axle design, size and functionality were crucial, the story of how and why i started this project can be seen here: Another nice thing about recreating this model is that there is plenty of space to place (and hopefully hide) the PF elements, because the real Humvee has a massive tunnel going right through the chassis and body, where the transmission goes (picture for reference): After some experimenting, this is how it seems from above and from one side using basic PF elements (1 AAA Battery Box, 2 IR Receivers and 2 L-Motors for drive), it all seems to fit nicely in the chassis, and it should be possible to put a cover for even more realism: And with the use of a Buwizz, it would be even smaller and better, but it already looks promising, i hope to be giving more updates soon, i hope you like it.
  15. Imanol BB

    Axle Collection Thread

    Hello everyone, i have a possibly good addition to this topic, some time ago i saw RM8 truck trial video which included some really nice models, one of them was a Toyota 4Runner (Is the white one at the beginning of the video) and something that caught my eyes was the front independent suspension, it was pretty compact and it still was fully functional, after some reverse engineering i was able to replicate most of the design, is a mix between a solid axle and independent wishbones which enabled a such compact and still functional design (I think i first saw this idea from Crowkillers in this same thread): So, i made a similar version, i also made some small modifications to meet some ideas i had, and this all started because i wanted to make a mid-size Humvee with fully functional suspension, i was mad because i wasn't able to achieve an enough compact, functional and realistic design, the lack of parts made it almost an impossible task, but looking at this new axle, some inspiration finally made the trick. The first prototypes for the Humvee axles were like this: Yes, they are pretty ugly, and don't even have portal hubs for gear reduction (Which means that using larger tires would cause a lot of stress), i had 2 options at the moment, using the "rare" black steering arms of the upper image for better overall clearance, or use the newer hubs of the lower image but sacrificing clearance, both options were really inefficient, unrealistic, without portal hubs and too wide, and both warranted a lot of drive train stress and not enough clearance, i was very unhappy with this. This is were the new axle helped, at first it was thought for a mid-size pick-up/SUV, with about 2-2.5 studs of clearance under the differential using the 62mm tires and is about 19 studs wide from one tire edge to the other, i first thought that this new axle wouldn't be so compact, but for my surprise there seems to be so much space that i even stacked an M-motor for an optional winch or PTO, the whole unit (Including the servo) just sticks about 2-3 studs above the upper edge of the tires, this means that there is no need for a bulky hood to hide the PF elements; and here are some images giving an small "teaser" o how it works (BTW, the hubs used are the normal grey hubs with tow balls, in the image are black because i don't know why i painted them like that): And after some inspiration (And because i always try to add portal hubs to every single axle i design), i came up with this, a (Supposedly) fully functional independent suspended portal axle extremely similar to the Humvee ones, is about 24 studs wide from edge to edge of the tires and the clearance under the differential is 5 studs with those (Oversized) tires, but it should use smaller and possibly 3rd party ones for more realism, it should be around 22-23 studs wide and about 3-4.5 studs of clearance, but i'm happy with the result, there might not be a locking differential, but it should still perform well: I hope you like it as much as i do, i will try to give more details about it, i really hope it actually works, i say this because i haven't carried a full test of the axle because of the lack of parts in my collection , yes, it is not really wise to assume it will actually work if i haven't tested it in real life (like most of the political systems), but some faith shouldn't hurt, and if any of you is interested in this axle please let me know, i will try to upload the lxf file too very soon.