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Everything posted by Didumos69
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That makes perfect sense. Probably, however, the distance between shock and rotation point is one thing, but the length of the suspension arm also plays a role. The distance between the shock and the rotation point defines the relation between weight and shock compression, but a longer suspension arm may feel softer simply because it has more travel. It will require less weight (= less shock compression) to make the same absolute travel. So a light buggy may sink into its suspension under its own weight just as much as a heavy car using the same shock placement, simply by applying longer suspension arms. Great car btw
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I think the up gearing was done to protect the cv-joints and differentials. The one good thing about this model is that it follows the best practice on how to avoid slipping gears, broken joints and twisted axles in the drive train / differentials: it works with high rpm / low torque instead of low rpm / high torque. And the first thing you want to do is nullify this design pattern. Imo, the real problem behind the poor performance lies in the controllers cutting off power too soon.
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MOCs vs Official Sets
Didumos69 replied to nerdsforprez's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
If a MOC reviewer would emerge on this forum, someone who would be for MOCs what @Jim is for sets, there would be room for critisizm too. Such a reviewer would be able to relate to other MOCs and share info on building style (say something on illegal constructions if applicable), techniques and experience (say something about nearly impossible building steps if applicable) from a knowledgeable point of view and this info could be very useful for people looking for a MOC to build. I know from the MOCs I shared on rebrickable, there is quite a large group of AFOLs who like to build MOCs with the parts they own, or at most few parts to buy. In fact that is the whole essence of rebrickable. -
MOCs vs Official Sets
Didumos69 replied to nerdsforprez's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Based on what? Do you actually build MOCs? Going by what is frontpaged on this site I believe you have a sense for what is awesome, but I don't believe you have thorough knowledge of, or interest in, out of the box building experiences or building techniques shared by MOCers on this forum. I fully agree with @nerdsforprez's line of arguing in this subject. -
Very cool! With the new wheel design the tires seem to fit excellently
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42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Yeah, with the new rotary catch a much more simple 4-speed should be possible. I hope it will be nothing like the 42056 gearbox because in that gearbox everything is wrong that you can possibly do wrong. -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Live axle is better for crawling very uneven surfaces and independent suspension is better for offroad racing. Look at the buggy's race classes. In Ultra4 (4wd) live axles are most common and in class one (rwd) independent suspension is more common. Ifs, and also irs, are gaining terrain also in Ultra4 though. This has a lot to do with better parts, such as narrower differentials. And independent suspension gives better ground clearance. One more thing: Also a LEGO-built 4x4 with independent suspension can be quite capable on uneven surfaces, as long as all wheels can participate in traction, which means enough suspension travel and smooth articulation. In serious awd SUV land, the competition is more about keeping traction on a slippery surface, or while one wheel is off the ground, which means smart torque balancing etc. This is a great field of exploration too. -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
From the same site: The real model appears to have double wishbone suspension: -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
My eyes are constantly drawn towards the line of roofing tile along the flanks. It just feels so misplaced. -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I agree the axle hole is the weak link during play, but when the model stands still for months it will slowly twist the torsion axle under its own weight. I know this from experience. Only when the torsion bar is auxiliary and carries only a fraction of the weight, causing only light torsional tension, it won't twist over time. The black axles from the 1970s had a different blend and did not twist over time, but these could break fairly easily under serious torsion. -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
It looks like something like this, but I very much doubt if LEGO would add such a feature. It will twist the torsion axle over time. I hope so too. If it uses the new CV-joints from 42099, I suppose at least the rotating part of the wheel hub will be new too. So why not also the new hub with Ackermann geometry we see in 42099, hopefully without the gear reduction. -
42110 - Land Rover Defender
Didumos69 replied to 1gor's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
So vomit is an official LEGO- color now? It appears Creator-ish to me too, so I hope the engine and suspension will be interesting, it has a little too many bricks that will come off easily. I do welcome the fenders though. It appears LEGO is using less flex axles to shape the body of recent models, which is a good thing imo. -
In that case I think the new XL motor has about the same rpm as the PF XL motor. Altogether the gearing up of the motor and gearing down in the wheel hub fits exactly my theory on how to avoid slipping gears and twisted axles in the drive train / differentials: high rpm / low torque instead of low rpm / high torque.
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I think there is one in each drive train, in between the motors and the differentials, to protect the motors. Indeed, we are not used to this. I'm actually getting more and more excited about this model. The rear axles even have stabilizing links (the same hub is used, but with the ball joints aligned horizontally). I also see some triangles in the main structure . I wonder how the rotation speed of the new XL motors compares to the rotation speed of the PF medium (405rpm) and PF XL motors (220rpm). Given the 5:1 gear reduction, I suppose/hope it's closer to 405rpm than to 220rpm.
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If these new hubs really are planetary, then how are the internal gears protected against dirt? And about the new clutch part, can it engage and disengage, or is it just another friction clutch? Btw, when Markus rotates the joint connected to the hub (8:00), I don't really recognize a 5:1 reduction, but maybe that's just me.
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Thanks @kbalage for this very cool video. The stickers are awesome too!
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I think they had trouble getting significant suspension travel with independent suspension and made the front axles pendular to compensate for the poor travel. The effect will be that when this model rides on very uneven surface, as suggested by the box imagery, the chassis will tilt along with the rear axles, as if they are a solid whole, and the front axles will do all the suspension work. The images on the box only show the model with it's front axles heavily articulated and the rear axles practically horizontal. That looks cool, but when the rear axles would stand uneven and the chassis along with them, that will look quite unbalanced. They deliberately left out such images on the box of course. Personally I find this really poor design.