lmdesigner42

Here's my 2 cents on some of the new sets. The pictures have a "confidential-preliminary" stamp on them, so they may not be final. 42117 - Looks like the 42002 B-model with a different colour scheme. I think the landing gear has some gears connecting it to the prop. 42120 - The hovercraft looks interesting, like an orange 42002 42122 - Decent Jeep, like the colour, really hope for suspension and/or 4x4 but don't expect it. 42124 - Independent front suspension, good; light blue and magenta colour scheme, not so good. I wonder if the rear axle will have swing suspension, or a better gear ratio than the rally car

Very interesting! Putting the detailed curvy bodywork on a model that size is one thing, squeezing a 5+R gearbox into the same chassis is another!

Do we know if the leaked images are of the final sets, or just prelims? Because if they're prelims, some of the details like colours and tires could change by release time.

Very nice mod, clearly this Batmobile is not just for show. Must have been a lot of work with all the parts in the interior.

I tried this out yesterday with the 8z-16z mesh using two 12z gears to connect the 8z gear to axle #1, and that is exactly what happens. It feels really weird having axle #2 seemingly locked in place with no support. With respect to N=3, I think another factor is that axle #2 is rotating in the opposite direction to the differential casing (if input is 1, diff output is 1/3, axle 2 is x, (x+1)/2 = 1/3, x = -1/3). If you wiggle axle #2 back and forth, it's possible to get the casing to rotate.

Nice work @2GodBDGlory, I'm very impressed it could stall an XL. I finally got around to adding some bracing and did a practical test of the transmission. It could stall 2x L motors geared down 3:1 in all 4 gears. Also capable of powering a large model with proper gearing.

Very nice gearbox! It's impressive that it doesn't skip or grind under load despite containing all the small bevel gears. By the way, that's an interesting way to install an L-motor in the CAD model part of your video.

Does that leave room for a new part that is half axle and half 4-tooth gear? Think of the possibilities of a 1 stud wide bevel gear... The backlash on a 4-tooth gear would be pretty bad though.

I don't have much experience with videos, but I'll see what I can do. PDF's are nice, but in this case I think the design is simple enough that they aren't needed. Thanks! I recently got some PU motors, so that may be worth a try depending on what kind of MOC the gearbox goes in.

Hi everyone. This is an efficient 4-speed gearbox design I came up with a while ago using the wave selector and new(ish) 20-tooth clutch gears. It is efficient since only 8 gears and 3 rotating shafts are required, which is near the minimum possible. The shafts in the image are as follows: Yellow - output Red - input Orange - shifter Black - extra, free-spinning All of the shafts go straight through the gearbox. The compact design is possible by meshing 16-tooth and 20-tooth clutch gears, which gives different ratios at each of the 4 clutch points. Unfortunately, the two shafts with driving rings need to be connected by another gear mesh (in this case 12:24) which results in out of order shifting with the wave selector. Gear 1 (1st) – 12:16 + 12:24 = 8/3 = 2.67:1 Gear 2 (3rd) – 12:20 = 5/3 = 1.67:1 Gear 3 (2nd) – 16:20 + 12:24 = 5/2 = 2.5:1 Gear 4 (4th) – 16:16 = 1:1 The shifting order issue could be corrected by using a mechanism shifting one driving ring back and forth and then the other, but that would take more space than the wave selector. The offset of one driving ring by one stud is handled by a sliding 16-tooth gear linking the lower driving ring with another 3 studs higher, putting it in the proper position to mesh with the wave selector. The extra free spinning shaft (black) is used to hold the third driving ring. The transmission fits into a small 9x7x6 box (not including the stepper) which can be easily connected to a chassis represented by the 5x7 frames. The below picture shows how small the core part of the gearbox is. In conclusion, the advantages of this gearbox include small size, few moving parts, and different ratios, while out-of-order shifting is a disadvantage. Comments and questions are welcome

Another great video on differentials! The O/I ratio makes me think of transfer functions lol.

Using large one-piece moulds for the mixing drum isn't such a bad move compared to previous sets. 42100 and 42030 only had one of the large bucket pieces, while 42112 has 2 large drum halves. Also, since it's much cheaper, the sales volume is likely higher. Therefore even if the drum mould is never used in another set, at least 3 times as many will probably be made as compared to the large bucket pieces.

Very nice looking cement truck! It's the same size as 42112, but has twice the pieces and more functions. Great backdrop too, it's very industrial and Technic-y.

I'm wondering what the driving performance of the Volvo will be like. 42070 was pretty fast for its size, and that was with a PF XL motor connected almost directly to the center diff, only going through a few 16 tooth gears. The Volvo will have the drive motor going through a gearbox with a large number of gears and shafts. It's also presumably heavier with ~200 more pieces, an extra motor, and whatever load is placed in the dump box. Consequently, I can't see it being faster than 42070 unless the PU XL motor puts out more power than the PF one.

How strong and compatible with Lego are the custom parts you're printing? It can be hard with 3D printing to match Lego tolerances. Just look at the quality of the parts produced by some clone brands...

Great model! Looks very stylish and performs well too. How did you do the front headlights?

I hope this side view doesn't show the actuators at full extension, since the tilt angle of the box seems a little smaller than real life.

Very nice tow truck A-model! Now 42108 is worth buying - for the parts at least.

Despite the small stylistic inaccuracies, the bodywork definitely seems to be improved over the Chiron, as it really pops with the lime colour, low-slung profile, angles, and unusual lights compared to the Chiron's more refined and understated appearance. Unfortunately, the extreme similarity with the drivetrain is disappointing. However, the Lambo also gets a +1 for the more visible gearbox, mechanical doors, and internally activated wing. Is this enough to justify the $90 (Canadian) price increase? For me, probably not seeing as I already have the Chiron. Another point to consider is the relative lack of new pieces. As far as we know, the Lambo has new rims, wheel arches, and the panels and rotor blades also present in the Osprey. In contrast, in 2018 the Chiron debuted the wave selectors, 20-tooth clutch gears, yellow extension rings, brake disk hubs - all of which are reused on the Lambo - and its own unique rims. Please correct me if I missed anything.

Just my two cents on likely functions for the Sian: Transmission similar to the Chiron yet different, such as a 7+R transmission without the DNR selector. Maybe some new components but keeping the same inefficient design philosophy. Obligatory flappy paddles with a third design different from the Porsche and Chiron One additional mechanical feature such as an extending wing, fancy doors, or adjustable suspension About the suspension, I doubt we'll see accurate or well-working suspension for the following reasons: Limited part selection. Real-life vehicles use highly irregular and custom-shaped parts to achieve correct geometry and fit the parts together. Space constraints. The space available for suspension parts is usually very tight, and Lego parts come in fixed sizes that are often too large for the scale, increasing the difficulty. This ties in with reason 1. Also, in order for the large 81.6 x 44 wheels to have a reasonable steering angle, the front suspension arms need to be narrow, further constraining the space. Stiffness. Lego springs come in only a few shapes and stiffnesses, so the mounting point is usually moved outward to increase stiffness, which is difficult given the limited space. Pushrods can solve part of this problem, but they add slack and the links tend to bend and shift instead of compressing the springs. MOCer's have come up with many ingenious suspension solutions, but that doesn't negate the basic problem. That said it would be nice to be proved wrong when the Sian is officially released. I think the exterior design does a good job representing the looks of the original, especially in lime, but it just doesn't scream iconic to me the way the Porsche and Chiron did. Maybe that's because I'm not a Lamborghini fan though.

Progress update: I redesigned the axles to use 6L links, and added soft 6.5L springs. The spring mounts only have 1 degree of freedom, but there is enough play in the frictionless mounting pins to allow the axles to rock side to side easily. The wheelbase is also 4 studs shorter, giving a better appearance, but this required replacing the rack and pinion steering with a set of 9L links. The engine also shrank from a V8 to a V6 to give better placement for the spring mounts. Significant progress has been made on the bodywork now, just need to finish the front end. The steering was a little challenging to fit, a half-stud offset on the shaft was needed for proper geometry and range of motion. And it's done! Nice, clean (IMO) red and black bodywork with a few system parts for details. A V8 is still possible, but the V6 fits better in the hood space. Functional 4-wheel steering: Articulating live-axle suspension: Total height about 15.5 studs: This "small car" is ready for the contest!

58. Mini-Monster Truck Features include: AWD with oversize V6 fake engine 4-wheel HOG steering Full live axle suspension Overall size is 25 x 15 x 15.5 (L x W x H) More pictures and info are in the WIP topic: https://www.eurobricks.com/forum/index.php?/forums/topic/177721-tc18-mini-monster-truck/&tab=comments#comment-3240868

Hello everyone, this is the entry I'm working on for the small car contest. It started with an idea for a narrow steered and driven axle, around which I'm developing a small monster truck-style model. Features planned at the moment include: AWD Four wheel steer Suspension Oversize V8 fake engine My first design for the suspension didn't work, as the springs (removed in above picture) in the extended position stressed the CV joints too much. The wheelbase was also too long for the form factor I wanted, so I definitely need to redo the suspension. The tires are 20x30, part number 6581 which according to Bricklink have an outer diameter of 49.6 mm so they fit for the contest. They're basically the same size as the 49.5 mm tires, but they fit the axles better and in my opinion look better for a monster truck. Another picture showing the axle width: Feedback and comments are welcome.

A locking differential could be done with the new differential introduced in 42109, since it can be locked with a driving ring on one side. On a slightly different topic, those head and tail lights look rather challenging to model .

Has anyone else noticed the large number of licensed sets for 2020? I count 7/14, plus the Land Rover if you go by set number. That is a significant increase as 2019 only had 4/14 and 2018 3/14. Will the number of licensed sets keep rising, or are we going to hit a licensing limit at some point? 42101 - generic 42102 - Claas 42103 - generic 42104 - generic 42105 - generic 42106 - generic 42107 - Ducati 42108 - generic 42109 - Top Gear 42110 - Land Rover 42111 - Dodge and F&F 42112 - generic 42113 - Bell 42114 - Volvo 42115 - Lamborghini