lmdesigner42

Yes, the kitty was a surprise guest. It's a challenge when your cats want to play with your Lego too :). If I have time, I'd like to make several minifig-scale aircraft/simulator pods that can be swapped out. Some progress on the body work, the colour scheme is going to be orange and white.

There are so many possible design ideas for this contest, it was hard to think of one that hadn’t been done before. I eventually settled on an RC truck with an aircraft simulator on the back. I remember seeing a similar MOC somewhere before, except that designer decided to use multiple small pneumatic cylinders to move the simulator. Instead, I decided to use 4 small linear actuators, driven in pairs by 2 PF M motors which were controlled by a remote with a custom 2-way joystick. The short video shows how it works. It’s very simple, moving the joystick back and forth tilts the ‘aircraft’ back and forth, and the same for side-to-side. The two directions can be mixed to some extent, although the overall travel is limited due to the small size of the linkage. It took a bit of trial and error to get the spacing between the actuators right, I ended up using 3/4 pins and this piece (https://www.bricklink.com/v2/catalog/catalogitem.page?P=48723&idColor=85#T=C&C=85). The simulator is also modular, in the sense that it would be very easy to swap out a plane for a fake helicopter or traditional simulator box. The truck chassis is very simple, the rear axles are directly connected to an L motor. Steering is done with a servo and a small sliding linkage, similar to 42093. For the rest of the truck, I’m thinking of doing a cabover design, with some brighter colours.

That's too bad. I think the locking feature on your transfer case might work for 4 Hi though since the ratio is 1:1. Designing complicated transfer cases is fun, but it's hard to get the different gear combinations to work as desired. Real transfer cases let you cycle through the different modes by rotating a single input or moving a single lever, but Lego's options for changeover catches make that difficult to copy.

That's a pretty compact mechanism, looks well-braced too. Does the transfer case spin okay in the Diff locked 4WD Lo position? It looks to me like in this position the rear output has a 1:1 ratio (same as 2WD), while the differential casing has a 3:1 ratio. I think that when the the differential is properly locked the casing and output should spin at the same speed.

I'm really liking this set, besides the fact that it's a P1. Way more curvy panels compared to 42056 and 42083, as well as new mechanical elements for the suspension and gearbox. I don't like the price tag though...

The real P1 has rear-wheel drive, which suggests that 42172 could reuse a lot of the suspension design from the Daytona, as it effectively incorporated the large shock absorbers and had similar size rims.

Nice to have another pic of the P1! Am I the only one getting Chiron vibes from the rear 3/4 view? The Chiron also had a curvy rear fender with solid red taillights and adjustable spoiler: https://www.lego.com/cdn/cs/set/assets/blt7fa3b10249c0c359/42083_alt3.jpg?format=webply&fit=bounds&quality=70&width=1200&height=1200&dpr=1.5 Hopefully the functions are a match for the quality of the exterior, although adjustable suspension may be too much to hope for.

This set is a nice successor to 42074 and 42105 in terms of size, functions, licensing, etc. I remember the visual size of 42105 being impressive for the low parts count, 42174 should look even bigger with the huge sails. The box will need to be pretty big to avoid bending them though. I think this will be the first set to have the small pneumatic pump driven by a hand crank instead of a motor. I'm guessing this is due to the small volume of the small pneumatic cylinders. If the large hand pump was used, they would extend quickly in a single pump, rather than slowly and smoothly like the real hydraulics.

Interesting idea for a GWP. The differential could be used for inline gear reduction by fixing one output.

Beautiful model, you have a real gift for perfecting Technic 4x4s. Would love to build it.

Great model! You fit so many functions and details into a small size, even down to the engine fan. I'm very impressed by the front axle - suspension, steering, and tilting, all on a single axis.

Based on one of the lifestyle pictures from Racing Brick's video, I think the Lunar Rover could have the newer black hubs with the large CV joint from 42160. Using this hub would make the part more common, and likely hold the large wheels of the Rover in place better.

Nice to finally get some official images of this set. 2274 pieces does seem like quite a few for the number and complexity of the functions, considering e.g. 42128 or 42069. On the back of the box pic where the cab is tilted, there appears to be a 12:16 gear connection for the steering. Is that the first time for an official Technic set?

Very nice model! I'm impressed how compact the axles are despite including the planetary hubs. Using steering links to hold the lower ball joint of the hubs is pretty clever. How do the dimensions compare to 10220? Your 4x4 version looks slightly smaller to me.

Interesting how pictures of the internals/motors for this set have leaked before the set itself. An integrated hub like this may be a step backwards in some respects compared to the usual modular hub and external motor system, but the multiple LEDs on the hub are something new. Hopefully the associated fiber-optics are better than the previous ones and will expand the lighting options for MOCs.

If the rumors about the upcoming Lego Technic 1:8 McLaren are correct, then CaDa has beaten them to the punch with releasing the Assassin XR this year.

Great model! Especially the nice long-travel suspension and curvy bodywork. This is what 42077 dreamt of being.

Yet another example of your ability to create incredibly complex and dense builds. Planning and routing the pneumatic system alone would be a masters-level challenge. Sariel made a similar-size JCB backhoe a while back, but it needed an external control and supply unit for the pneumatics, while you managed to make it mostly onboard. Great job with this model! I'm sure it will inspire others in the future.

I'm impressed by all the features they packed into this small model! Reminds me a bit of a modern take on 8048. I think the 8066 B-model had a bit of tilt-to-steer going on too, but only on the front axle. Also, I just realized from looking at these images that the coiling on the soft spring was updated this year.

What a great model! Lots of innovative features and functions for the small size. It definitely adds something when you build a model of something you own in real life.

Apologies if this has already been answered before, but is it possible to connect more than one CaDa remote/hub pair in a single model for 8 RC functions? Or is there interference between the radio channels?

That's a pretty neat gearbox concept, similar to real-life planetaries and it seems very robust. Would there be any advantage to using a traditional transmission driving ring to switch between a 1:1 ratio and going through the planetary hub?

I don't use studio much, but I made a quick model of the front suspension and added it to the Bricksafe folder. Here's a direct link. Maybe other software are better, but in my limited experience it is hard to properly connect parts and assemblies in studio at the unusual angles that are often used in MOCs.

Yeah, the windshield is a little awkward, and the smaller scale emphasizes that. The doors can sit flush if they are pushed in all way and pop past another piece, I didn't notice that when I took the pictures. You've got a really good eye for detail! Photographing black is always difficult, and it doesn't help that my main light source is a window on the side. I'll try to lighten the pictures a bit though. Thanks for the photo advice. I combined the two comparison images you mentioned for the entry post. I know it's hard to see details in smaller images, but I felt like a combination strip showing the overall similarity was less overwhelming than 6 full-size images comparing the same two models from different angles.

Name: Mini Extreme Cruiser Features: independent front suspension rear swing axle with shock absorber HOG steering Working drivetrain with differential and fake V4 engine Opening doors, hood, and trunk Detailed front and rear facias Original model: Mini Extreme Cruiser: Video: Discussion topic: