Jeroen Ottens

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    The Netherlands
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  1. This is shaping up to something good I feel. Loads of functions in an elegant styled package.
  2. Jeroen Ottens

    KTM concept buggy with BuWizz

    Great looking model. I really like the clean lines and crisp colourblocking you achieved And great performance as well.
  3. Jeroen Ottens

    [WIP] Liebherr LTM11200 crane

    Hi, The instructions are done! They are available on my website (and will soon be available via Rebrickable as well). I'll do a longer write-up later, but here is a bit of text on the functions: The model has 8 motors equally divided between the carrier and the superstructure. In the carrier one motor is used for switching, whereas the other three are used to drive different functions depending on the position of that switch. It has two positions. In position 1 the three motors are used for driving, steering and switching the steeringmode (you can steer normally, or you can crabsteer). In position 2 the three motors are used to expand the outriggers, elongate the outriggers and finally extend the outrigger feet. In the superstructure a similar setup is used, only this time there are four positions for the switch. Which gives 12 different functions that can be remotely controlled. Of these 12 functions 8 are located in the superstructure itself: Rotating the superstructure * Raising/lowering the counterweight Raising/lowering the hook Raising/lowering the boom via the cylinders Raising/lowering the boom via the rope-and-pulley system Raising/lowering the arm of the operator cabin Rotating the arm of the operator cabin Tilting the operator cabin And 4 functions are routed onto the boom: Extending the 4 section boom * Spreading the stabilizer arms Tilting the stabilizer arms * Raising/lowering the supporting legs (needed in case the boom has to be transported separately from the rest of the crane) This model was always intended to push the edge of the possibilities with LEGO Technic. And unfortunately that edge pushed back. The model is incredibly complex (as an example: it uses over 300 gears) and doing all that in plastic proved to be too difficult for some functions. The functions with an asterisk require manual assistance when operating. And believe me, even though lifting the boom is possible by combining the cylinders and the rope-pulley system, it is really scary to see how much force is going through all that plastic. Nevertheless, I feel that this model does not meet my quality standards. I therefor decided that I will offer instructions at 50% of the intended price, which means you can buy the instructions for 37.50 euros instead of 75 euros. You will be able to pay full price for the instructions if you want to encourage me to keep pushing the Technic boundaries. The partslist can be found here. I have done my best to make sure it is right, but with 7692 parts it is easy to make a mistake... Like I said, I will do a longer writeup later (and include photos and a video of the total model). Leg godt, Jeroen
  4. Jeroen Ottens

    [Review|Rant|Mod|MOC|WIP] 42083 revisited

    I am still following this thread with quite some interest. And even though I like the fact that you've added ride-height adjustment, I don't particularly like your solution. It looks like the force of the suspension is carried by a tooth of the 24 crown wheel when the suspension is in the lowest position. I know it is possible to make an adjustable rideheight mechanism that works like a knee (or like an aircraft landinggear), because I recently did so in a 1:10 scale car. That is, you can design a mechanism that locks itself in place, thereby leading the forces into structure directly instead of via the axles of the switching mechanism. In my case I used a crankshaft element to get a one stud displacement of the attachment point of the spring. If the spring is angled upwards enough it will always push the crankshaft against the surface below it. There will be no torsional load on the axle anymore. The disadvantage is of course that this form-locked position only exists at the extremes. In between you will still have a torsional load on the axle. Here is an attempt to draw with ASCII's to explain the idea (front view): Position 1: high, Position 2: low \ \ \ \ \ \ ___O-+_____ ____+-O_____ The slashes represent the spring, the +-O is the crankshaft with the + as the pivot point, the ___ is the surface below the crankshaft to prevent it from turning further. Anyway, feel free to ignore this, it is your build
  5. Jeroen Ottens

    [WIP] Liebherr LTM11200 crane

    @legolijntje is helping me out on the instructions, he is much better at that than I am.
  6. Jeroen Ottens

    [WIP] Liebherr LTM11200 crane

    We are finishing the instructions as we speak. It is only the front cover that is missing. The whole book is now 1173 pages (excluding the front cover). So bear with me for just a few more days and then it will be available.
  7. Jeroen Ottens

    [WIP] Miura concept [FKA Codename Silvestros]

    Hmm, finding the balance between clean lines and boring design... I'll see what I can do. The A-pillars are still in development. Maybe I will add some blue accents to it (a continuous flexaxle along the roofline?), let's see. I really would like to have a single-direction-curved panel that fits to the curve of the larger panels. The 3x4x5 panels do have that curve, but they are 3 deep and not available in dark azure... The top part of the hood sits flush on the V10 engine, so I can't lower it unfortunately. The axles are shown in my first post, they haven't changed (yet). The good thing of using pulleywheels is that they work with both rims. The pulleywheels have a good grip on the CV-joint, so so far I've had no issue with them falling of.
  8. Jeroen Ottens

    Grum's Shed

    It's taking shape. But I guess the 'technical part' is nearly done now (just the engine is missing)? It is just bodywork from here on? Does this MOD also have the separate self-supported bodywork?
  9. Jeroen Ottens

    [Review|Rant|Mod|MOC|WIP] 42083 revisited

    Interesting read. It addresses the emotions I felt while building this model very eloquently. It is telling I guess that you are already the second person to step up and improve the structure of this model. I am very interested to see what you can come up with. The Chiron feels so overdesigned, you should be able to shave off a lot of parts (and weight).
  10. Jeroen Ottens

    [WIP] Miura concept [FKA Codename Silvestros]

    Thanks, yes it is Can you elaborate? What gap do you mean?
  11. Jeroen Ottens

    [WIP] Miura concept [FKA Codename Silvestros]

    I think the rake is a bit too much, so I'll tune that down a bit, which will make the need for an even groundclearance also less. Nevertheless I will have a look whether I can do something about that. It will not be easy though, because the black parts are an integral part of the structure of the bodywork. That whole shell is really stiff (even the A-pillars add significant stiffness to the structure through a little pre-tension trick). Thanks. I agree the rake is a bit too much. This was a quick prop-up for the idea, I'll still have to redesign the axles, so I will have some work to tweak it to get the right angles. The rearaxle was very easy to widen, I just added extra pullywheels to move the wheel outside Obviously I will have to redesign the axle to get a proper solution. I'll make small sketchup of the doorhinge. It is a very compact solution (I used something similar in my Mercedes-AMG GT R doors) The higher roof was not bad I agree, but since I try to replicate Marco's sketches I am confined to his drawings and there in fact even the current roof is one stud too high. So I will do one more iteration with an even lower roof... Both ends were dropped, but because of the added rake the rear does look a bit higher compared to the front than before. The front overhang is about one wheel extra, again pretty close to the sketches. Thanks, I have the same feeling. Also it literally feels better with each iteration. You can't see it from the photos, but on the inside of the bodywork for each iteration better bracing is added to make that sheel completely self-supporting. I must say that I really like the flexibility that having a separate bodywork gives me in optimizing the design. I'll definitely will do that again for a next 1:8 scale project (for a 1:10 scale I think it will take too much space).
  12. Jeroen Ottens

    [WIP] Miura concept [FKA Codename Silvestros]

    So, it was back to the drawingboard again. Battling a throat infection didn't help, but here is the next version. I lowered the roof, made the doorhinge with a 4-link mechanism so it can now sit flush in the bodywork, I also removed the angle and gave the car some rake instead. I spend a lot of time on the hood as well. It is getting better, the flow is definitely improved compared to earlier versions, but I am not sold on my central 'column' solution. The rear has gotten a facelift as well. It doesn't show on the photos that well, but it is stupendeously wide, which is enhanced with all the horizontal lines in the design. Still, I like it as it is now. And a final shot to show the total: Comments, critique and questions are appreciated. Jeroen
  13. Jeroen Ottens

    [MOC]Lego Suzuki Jimny Sierra

    Nice clean model. It is difficult to judge it's scale, which is a compliment.
  14. Jeroen Ottens

    [WIP] Miura concept [FKA Codename Silvestros]

    Hi, The third incarnation of the bodywork. I followed @Didumos69 advice and have moved the A-pillar 2 studs back and elongated it with 2 studs, which makes the roof a lot shorter. Furthermore I cleaned up the area near the doorhinge (it is a bit colourvomitious ATM, especially the black 3x7 panel should be dark azure) @Meatman: this nicely fills the gap behind the fender I think. Finally I widened the body with 2 studs, so the wheels are now too far inside: I also made a first bonnet that is somewhat acceptable I think. It still lacks flow though, so more work to be done in that area. In all other areas the panels really start to flow well into each other, I actually caught myself stroking the bodywork because it feels so smooth Comments and advice is appreciated as usual.
  15. Jeroen Ottens

    [MOC] Volvo EC750E

    That is a good looking excavator. Looking forward to the video. The photos are a bit dark, some editing wouldn't hurt