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Everything posted by Jeroen Ottens
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42056 - Porsche Speculation
Jeroen Ottens replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
It surely looks like a sequential gearbox. I would be very, very pleasantly surprised if it is more than a 4 speed sequential transmission. That has been shown multiple times already by several of us. Given the fact that the orange levers that connect to the linkage are not at 90 degree angles in all photos keeps my hopes up... -
You are absolutely right with most points, but still the Claes does work... And they have minimal space to work with... I am really, really curious what solution they came up with I am not sure why you would need telescoping axles. If you have one axle that can slide backwards and forward you only need one gear on the axle and N gears in a row above it so that it can move in N positions but still engage with one of the gears on top (basically a linear gearbox with just one gear-ratio for every position).
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If I would have to design it...? Hmmm... Start with normal three beam steering setup on the rear axle (no gearrack!). Do the same for the front axle, but here add a steering beam on both sides. Put a catching mechanism (two bionicle teeth with a gap in between or something like that) on each steering beam (both sides). Now make a slider that can move forwards and backwards and has a couple of levers (just 2L beam with crosshole) sticking out that can engage in the bionicle teeth and can rotate around it's own axle. By rotating it will push the catching mechanism left and right and steer the wheels. By sliding it it can engage in the front (front side) --> front wheel steering, the front (front side) & rear --> 4 wheel steering and the front (rear side) and rear --> crab steering. The rotation angle of the slider is small enough that it will always catch the lever within the bionicle teeth, no matter the angle. I'm pretty sure it is not like this though, because the lever on the backside is moving side-to-side to switch modes and it is difficult to transfer than side-to-side motion to a front-to-back sliding motion... Rotation is not too difficult on the other hand, that is just some gears sliding past each other. Just my 2 cts
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It most certainly is more complex than that. The biggest issue with having multiple steering modes is to make sure the phase of the front & rear wheels stay intact. Your setup will only work if you switch mode when all wheels are at 0 degrees at the time of switching. If you switch from front-wheel steering to 4 wheel steering while the front wheels are still angled it will start to jam up pretty quickly. In the demonstration video you can actually see the guy switching while the wheels were not in neutral position. That is some really clever mechanics inside... My bet is on a linkage system, but I haven't figured out yet what kind of linkage...
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42056 - Porsche Speculation
Jeroen Ottens replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Yeah I thought the same thing... Electric motors and batteries are heavy... That is one assumption I had going out of the window. The other one (about the doorhandles) is also debunked already , they are strictly ornamental -
42053 - Volvo EW160E
Jeroen Ottens replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Maybe the power functions addition is only the lights? That is the one thing shown on the backside of the box... -
42056 - Porsche Speculation
Jeroen Ottens replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I'd hope for silver. Quite some panels are available in silver (on that GOTG ship), as well as some beams, so not too many extra parts are needed in that colour. All black is just too boring. I suspect it has functional doorhandles as well -
42056 - Porsche Speculation
Jeroen Ottens replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Awesome looking model... But at this scale and with these special fender pieces that feels a bit like cheating. Less of a challenge so to say. Very, very happy with the new rims, finally a proper offset... Very curious for the mechanism near the steering wheel, in the video you can see some red clutch catcherovers in the structure in front of the steering wheel. So most likely there is indeed some kind of flappy pedal sequential gearbox on board. The center catchover could be to switch between 2WD, 4WD and 4WD with locked center differential, but I have no idea whether this car IRL has this feature. RC or not RC, that is the question... I have a hard time believing that Lego would put both a sequential gearbox and an RC function in one model. The efficiency losses in the geartrain are just too big to have both in and still have a decent performance. I'd go out on a limb and guess that the pricetag is high because of the Porsche license... The low ride height could be because the model is bolted down. It most likely looks better with the springs fully compressed, so why not use the bolt to bring the model as low as possible. -
Very promising start indeed! Nice proportions and it has some wonderful curves in it. Nice doors at the front as well. The floating rearaxles are similar to the one that Crowkiller showed a couple of months ago, right? Why did you decide to stack the 3 XL motors? Do you need the space beside them? I can imagine that if you could put them side by side you get a lot of room for the watercannon (and then I would opt for the high reach extendable cannon, just because is it is more complex ). You say you put the batterybox in the rear, but where? There seems to be little space for it. The only thing I am not sold on is the colourscheme. The black is too dark, Dark bluish gray on the outside would make it look more refined I think (of course you do have to find solution for those panels... Really looking forward to the next update.
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- Rosenbauer
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Very interesting project and very challenging I'm sure. How do you balance the head on top? Is it rolling on the sphere?
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Autogyro Model
Jeroen Ottens replied to John Daniels's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Well shaped, cool helicopter. A lot of features for the size of the packages and a very smooth, flowing exterior design Next challenge of course is to have an actual swashplate in there -
Cool shape and coloring... And crammed full with PF without losing the sleek looks: impressive! When I saw the first pics I wondered how it would look with wheels, but I agree with you, they clash badly. You probably have to redesign the whole bodywork to make it flow around the wheels. Still worth a try I would say...
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[MOC] Simple Supercar
Jeroen Ottens replied to Lipko's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Wow! There are some stunning lines in this beauty. I love the curve of the rear fenders and the slope of the windshield. An almost perfectly closed interior, with all these curves is also quite a feat. Finally I really like the spring-assisted opening of the rear. What I don't like are the bonnet (too many little elements, it misses the sleek, large surface beauty of the rear, allthough I really like the shape of the curved flexaxles) and the black part below the doors (also too many small elements, having fewer, larger elements would make the side look cleaner I think). Too bad you couldn't incorporate a mechanism for the doors as well, but seeing the density of the build I don't think anyone could. Still, it looks stunning -
Wow that is some mean looking beast. I love the smooth mechanical transformations of the outer shell, that's just brilliant, I second the request for internal pictures
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I toyed with the idea and it works reasonable well. It has a tendency to twist when only one wheel is connected to one wishbone. By adding a solidaxle between the two wishbones you can get independent suspension without the wheels tilting sideways, but the structure becomes bulky quickly. In one of the Chima sets it was used by TLG...
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Is it right to refuse to sell a MOC?
Jeroen Ottens replied to Sariel's topic in General LEGO Discussion
This guys logic reminds of this somehow: It's OK if you disagree with me... I can't force you to be right -
[TC9] Motor Grader/Dump Truck
Jeroen Ottens replied to D3K's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
It's really compact, but the cab is quite low now... -
[MOC] Mini Roadster
Jeroen Ottens replied to Skandinavc FH's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Gorgeous Could be a competition: Microbuild <20 pieces with at least one technic funcion... -
[WIP] Saab 900
Jeroen Ottens replied to DavSod's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Instantly recognizable as a SAAB. Do you plan to keep the wireframe or are you going to fill the bodywork?