lmdesigner42

Thanks for the positive comments! Originality was definitely what I was going for. I'm glad you like the colour scheme, all-white would be a bit bland.

Aircraft Simulator Truck Functions: Remote-controlled drive and steering Remote-controlled aircraft pitch and roll with 2-way joystick Opening doors, tilting cab, storage compartment Various details such as seats, steering wheel, wipers, fuel tank, fire extinguisher, spare tire, etc. Video: Discussion topic:

The truck is all finished, added some more details around the cab and rear, such as a sunvisor, mirrors, spare tire, and mudflaps. I went with a red and white colour scheme for the miniature plane. It turned out smaller than anticipated, below minifigure scale. The cockpit has a suggestion of an interior, but it's too small to fit a minifig, even with no legs. On the plus side, the small size means there's plenty of room for swooshing on the back of the truck. All the pictures are available on Bricksafe: https://www.bricksafe.com/pages/lmdesigner42/aircraft-simulator-truck Edit: Functions video now available:

The pictured plane was just to demo the functions, the final one will be more detailed. I've added some more details on the side of the chassis, and the cab is almost finished. The colour scheme is a white base and orange top separated by a dark blue stripe. The doors also open and the cab tilts for access to the Power Functions.

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.