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Everything posted by Didumos69
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Technic 2017 Set Discussion
Didumos69 replied to CM4Sci's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
42070 bends severely under it's own weight. Would bother me a lot. Smells like something that could be improved . -
Technic 2017 Set Discussion
Didumos69 replied to CM4Sci's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
That's thrilling, but I think this belongs in the Technic 2017 Set Discussion. -
Hahaha, sorry, I have been so much focused on the suspension of this vehicle's that I can hardly imagine anyone posting a comment that is not about the suspension. My bad. Edit: I can confirm the gear layout corresponds with the one in Paul's Vampire, albeit a little less compact. The Vampire gearbox is also known as Paul's AWD transmission.
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This looks indeed better, now it no longer slides I suppose. I couldn't get this out of my head, so I made something I would regard as the non-steered equivalent of your front module. It uses more parts of course, but it's form-locked and does not use ball-joints, LXF-file can be found here. The way I installed the suspension assemblies required a little stressing of parts (see images in the spoiler, there's also a short video), but the whole module can be build legally, i.e. without stressing parts. Btw, it was very rewarding to build this, because now I got to really feel how the extensive lever arm operates .
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I didn't want to disturb @Erik Leppen's topic with this side-discussion any further, so I moved to this thread. I tend to see this differently. Translating the shock along the parallel wishbones does not affect the way the compression of the shock relates to the vertical movement of the wheels. It would always compress the same, unless the suspension arms would bend of course, but then I would no longer consider the suspension arms as parallel.
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I like the similarity with the front module too, but I think you could also obtain similarity with fixed links. This will give a lot of unnecessary slack in the rear wheels. If I'm not mistaken the steering links are secured to the chassis using perpendicular axle pin connectors, but these can easily slide off the axles they are attached to, they are only friction-locked and not form-locked to speak with @Jeroen Ottens' terms. If you could find a way to secure these links better or even give them a little tightness by offsetting the connection at the chassis-side with half a stud lengthwise, I think it would make a much better rear module. (The steering links can handle such offset easily, because of the slack they have.)
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Thanks! I wasn't to serious about this one, I just wanted something with steering and suspension to tow. But it turns out more fun than I thought it would.
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Indeed. I tried to reason what @Erik Leppen's 'arm' means for my rugged supercar suspension and came to the conclusion that my setup (left in the image below) behaves as if the spring was positioned as in the right half of the image below. I actually translated the springs along the suspension arms away from the wheel. The red parts indicate the 'arm'-length. EDIT: I corrected the image.
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When you update the steering setup, please also take into account that slanted steering rods make your steering very sensitive to bumps. See this video.
- 22 replies
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- 8-speed
- transmission
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Haha, I can't believe you actually built it . It has one big flaw: Suspension and steering interfere heavily, as you can see in the video, but it seems like fun nevertheless. Thanks!
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I'm still waiting for the final parts to arrive. In the meantime I designed myself an ugly vehicle to tow. It has four-wheel steering and articulated suspension . EDIT: Btw, what's wrong with the second image (apart from some wheels not touching the ground properly)?
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I think what Erik means, is that the complete compression of the shocks translates into 1 stud vertical travel of the wheels, which is quite direct (the shocks themselves also travel 1 stud), but I agree that if the whole model is going to weigh around 2kg it might not be enough. As a reference: For my rugged supercar (1.9kg) I used double hard shocks to gain 2 studs travel for all wheels. For the front this turned out sufficient, but in the back I had to add torsion bars to avoid too much compression under the vehicles own weight.
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The Technic Confessional
Didumos69 replied to Didumos69's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
These are indeed great sins! I just recalled I did this to secure a pin properly. I never applied it in any MOC though .- 121 replies
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- technic
- confessional
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BusterHaus Builds
Didumos69 replied to BusterHaus's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Very nice! I will build it and check the rigidity . -
The Technic Confessional
Didumos69 replied to Didumos69's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I have to confess, I steel parts from my kids too. I once removed the small bevel gears from the diff of my son's 42037, because I needed them. Sadly enough he found out the pistons no longer moved and made me fix it right away.- 121 replies
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- technic
- confessional
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Makes me curious! Now that I've got that set, I hereby volunteer for test-driving your instructions . Btw, I'll get back to your message about instructions soon. Thanks! About the color vomit. It's always a matter of taste of course, but I get your point. With this being a 40th anniv. tribute, I decided to use colors for axles and pins etc, that are most common at the present times, so people with relatively new sets - and with the part - need only add relatively few extra parts.
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Thanks! I also checked the parts of the 42061 Telehandler, but this can really not be regarded as a 42061 C-model: It has only 9 parts in common out of 141. That could be stretched a little to about 15 by changing colors, but that's it. Sorry @Andy D. I did buy the Telehandler for this project, but mainly for the two new that I needed.
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Thanks! Haha, that's nice indeed! I even tend to think about the orientation of the two thin holes in the bushings body ! I studied parts availability a little and I think I will do a blue cabin and a red tow and outriggers in the final model:
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[MOC] Citroën DS
Didumos69 replied to Anto's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nice start! I'm a little concerned about the max steering angle though. The Citroen DS had a quite narrow turning circle despite its length, but the LEGO CV-joints will only allow for slightly more than 0.5 studs movement in the steering pivots. Like this: I can confirm this. Btw, normal position = normal driving position. When parked, the suspension pressure drops and the car defaults to the lowest position.- 33 replies
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- citroën ds
- pneumatic suspension
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