Lipko

Once I build a projector box for my wedding.The box worked fine (it had a slot for holding mobile phone, a mechanism for sweep on the screen and an adjusable/lockable cartridge to focus, adjustable legs, etc), but I couldn't find a proper lens for it. The lens itself would have been more expensive than a full, simple projector machine... I'm a bit sorry I didn't take pictures because after adding cardboard to the box (to close all gaps for maximum performance) the thing looked like a space probe.

What's wrong with the ring part? I saw that is used for similar purposes. I don't think it's that rare.

https://www.bricklink.com/v2/catalog/catalogitem.page?P=11010#T=C But for the note, that gear isn't really designed to slide on an axle either... So you could basically use a cracked half-bushing too...

Thanks for the comments! Yup, it would be, but I didn't have proper wheels (and didn't want additional weeks of delay), though it may decrease the space for the wheels in retracted state. Maybe a minor redesign of the way the wing is mounted would be needed. I searched for many reference pictures and some of this sort of aircraft do have very small wheels. I guess these are not designed to land on grass... There are other compromises too, for instance I'm not too satisfied with the movement range of the ailerons. I think it's acceptable but I would have been happier with a differential aileron setup. I literally tried over 20 versions for the linkages but either was too flimsy, the central position was off (in central position the surfaces should point slightly downwards to preserve the wing shape) or the range was small. I had to stop somewhere...

Thanks for the comments on potential winning, but if I want to be honest to myself, the project was too ambitious for the contest. It would be stupid to blame the post office. If other contestants had spent that amount of time I did, winning wouldn't have been that sure... (I'm pretty sure I screwed up the tenses)

The model is originally designed for an Aircraft building contest, but the ordered parts didn't arrive in time. The model and filming/photographing was done with one week delay but the time I could allocate for the project was already used up so I could only edit the material another two weeks later. Anyways: This is a custom light sport two seater aircraft. It wasn't modeled after a particular type. Features Flight controls: ailerons (from cockpit and HOG) rudder with return to center (from HOG) elevator (from cockpit and HOG) flaps (from cockpit) Other: flat V4 engine propeller pitch control (from cockpit) retracting landing gears (with knob on the bottom of the plane) nose gear with drag steering manual propeller drive with ratchet (on the left side of the plane) canopy door and engine cover opens Play features and operation There are two main groups of commands: cockpit and hand-of-God. The cockpit (apart from the working dual joysticks) has the controls that are less frequently used: propeller pitch and flaps control. The HOG area has the main operational features: ailerons, rudder and elevators. The rudder has return to center, because its levers are close to the joystick and it's easy to unintentionally touch them. The color vomit in the chassis is intentional, there is also some level of function coloring inside but I didn't force it too much. I want to release the 3D file for the model but I have no idea when I will be able to work on it. You can find all pictures here and you can read about the struggle in more detail here: Video: Thanks for reading!

Congratulations to the winners! I'm a bit sorry that I missed the deadline, the model is already photographed and filmed (with 1 week delay). The laptop broke before shooting photos and I will only recieve it (hopefully) today.

Sometimes I'm shocked how fast some people can build awesome models...

Choosing the first was easy. Awesome looks, functions, style, quality, etc., and it is one of the few entries that don't have a (or some) serious flaw(s) that I wouldn't accept in my own model. 3: 10 5: 6 4: 4 10: 3 11: 2 12: 1

The package is already in the local post office!!!11 Another few days and I will recieve it ""processed""

I can't just take two days off from work, so a 2-3 days of delay of the post could mean a week delay on my side. So I will not ask for no special permission I will just focus on finishing the model. The chassis already looks pretty awesome in final colors

I can't enter because the parts have not arrived yet.

I'm not a plane builder either, that's why I joined the contest. Anyways, I enjoy your build too and took inspiration from it, for example I almost ditched flaps but since you implemented it, I didn't want to leave it that way. Also your model has landing gear steering, so I added it to mine too (and also because I realized it's sufficient to add friction to it, no need for return to center mechanism).

Sure, I will make proper photos and video and also LDD file.

Okay, the parts won't arrive in time, probably only on Monday or Tuesday. The crazy B plan is too crazy and it's not worth it just to be able to join the contest. I will finish the model next week though and only apply changes that I would have done if the parts arrived in time. Good luck for the contestants and I hope I won't forget to vote again...

OFF: This will be very close. I'm waiting for an order that's going to be shipped by the Hungarian Post. I trust them so much that I started another order that ships with a more reliable way but doesn't have the most important parts... Hopefully one of them will arrive on Friday the latest or I won't finish in time for filming and photo making. If the original order won't arrive in time, I will have to buy a set to along with the other order. The original order will eventually arrive, meaning that I will have quite some many unnecessary parts. Hopefully I can re-sell the unnecessary lot so I will only loose shipping costs ON: There are still minor things to solve. This was the toughest development I had so far with a Lego model.

So it's not a failure, you just have to change some concepts. That's perfectly normal design process (at least for me)

That's true but I think M_Longer meant that the scale is too ambitious. Meaning investing a lot of time and a lot of money (for example 18 power puller wheels) on something that's more likely to fail causing frustration and burn-out. Only a very few and experienced builders are able to make such big and good quality models. For the others, like me, "normal" scale models are the way to go.That doesn't mean playing safe. I build mainly cars, yet I'm building an aircraft at the moment for a contes, built a backhoe for another one. Just like in programming: everybody wants to make the next "WoW killer hockey MMPORG" or the next "compress anything to 2 bytes then recover it perfecty" or "simulation from atomic level to galaxy level" program, but these are bound to fail. You get the idea

I'm on the opposite side as the other posters. I buy sets for parts and while I do enjoy building the sets, I don't want to spend too much time with them. I don't think that means I don't learn anything from them, I can see the small solutions and building trends just fine during fast building. I don't care too much the bigger picture, because usually the models I build are unique to me, so I have to "invent" most things anyway. How parts can be connected, what (new) parts exist and what their properties are (something I can't imagine how you learn without building sets), how parts can be used in funky but "legal" ways are something I can learn from building sets. Maybe it's like this because I'm a machine designer by profession, so I know basic solutions and how to approach mechanical problems. There are few ingenious solutions in sets (for example the steering in the Xerion) which I would adapt, but usually such thing can't be adapted as is. And the principles of such a solution are pretty obvious once you start to play with the model (and yes, I do play and try things during the build, I'm not just racing with time)

Sorry for not keeping the project updated but lots of work went into the project and I still don’t have an own computer. Anyhoo, wall of text: The project finally is in the finish-line, all functions work okay and the look is also coming along nicely. Changes: Connecting the front gear with the main gears required redesign of the whole middle part of the chassis which was hard enough to design for the first iteration, but in the end, the final solution fits very nicely into the chassis. Just like the whole model was designed around the landing gear mechanism. After so mush struggling with the whole thing in the first iteration of the chassis, I was lucky in the second iteration because despite of the slightly different linkages for the main and front gears, the range of operating was the same and also the mechanism could be perfectly synchronized. So front and main gears snap into deployed position in the same time resulting in a very stable stance. Another change is flaps, which was a last minute addition (I gave up on it early during development) after I realized that pretty much all airplanes have it. I struggled with it for hours and I could only come up with a very flimsy solution first (mounting on only one side of a flap), so I almost gave up on it again. Then I realized that actually flaps are longer than ailerons in real airplanes meaning that the proportions of the wings was very off, but also meaning that I could mount both sides of a flap, resulting in a very stable solution. I managed to make a linkage so it can be operated from the cockpit. The kinematics is not perfectly realistic but it’s a decent compromise between simplicity and authenticity. General challenges during the whole development: The fuselage towards the tail was one of the toughest part of the design. It has to be relatively thin, stiff but also has to contain two linkages to the rudder and elevators. I decided to solve it with an “off-system” truss because no Pythagorean triangles fit the shape without being in way of the linkages. Also a 4-stud high straight chassis seemed to be too thick, especially because some linkages have to go below the lower beam, plus it has to be reinforced which would increase the weight, etc. But this off-system choice introduced other issues. I don’t know how many iteration went into the design because apart from the aforementioned requirements, there are two very important ones which I failed to realize in earlier iterations: the tail plane has to be parallel with the pulling vector/centreline (I don’t know the proper term) and also the centreline of the fuselage should lie on the centreline of the whole plane which is the same as the axis of the propeller. In the recent (ant probably final) version I had to sacrifice a bit of the cleanness of the linkages I already had. This also introduced slight rubbing between the two linkages, so I still have to add some kind of return-to-center at least to the rudder. I selected the rudder because it’s more obvious than the elevator if it’s off-center, and also the elevator is more likely to be played with than the rudder. Another thing that made the whole development very hard was that the wings point slightly upwards. This is a necessary design choice because this kind of aircraft have this feature. I hope that this model choice sets my entry apart from the others with the more “straight angle” models. Don’t get me wrong, all entries are awesome, I just fell in love with the shape of modern light aircrafts. The bodywork: This, again, was very challenging but I think I’m on the right track, and the biggest ”innovation” in it is the color stripe slightly above the centreline. As it divides the general appearance into “up” and “down” half, it effectively hides panel flow errors and gaps. Black color also hides panel flow errors which is especially important at the back of the canopy door with the hand-of-God joystick. The model started as a four seater but there’s only enough space for two seats. I could squeeze four seats inside but that would be rather unproportioned so I dropped it. Or redesign the whole thing, but placing the HOG area towards the back with that much (about 4 studs minimum) would make the model very unbalanced and I won’t add a faux wheel, that’s a given. Play features and operation: There are two main groups of commands: cockpit and hand-of-God. The cockpit (apart from the working dual joysticks) has the controls that are less frequently used: propeller pitch and flaps control. The HOG area has the main operational features: ailerons, rudder and elevators. Near the area at the back of the left wing is the axle to rotate the propeller. It’s achieved through a ratcheting mechanism so it’s quite pleasant to use. The only thing I don’t like in this solution is that you are not able to swoosh around with the model while rotating the propeller and control the flight surfaces at the same time. My initial plan was to make a button-like device with ratcheting so the propeller could be operated with the hand that holds the plane but I couldn’t find a suitable spot for it (there’s not enough space in the middle of the chassis) and also pushing a button continuously would cause finger fatigue, so I dropped the whole idea. TODO: seats. I haven’t decided yet if design it studless or studded rebuild with proper colors filling up some gaps in the bodywork fixing the panelling of the tail fuselage adding some weight to the front, the model tips too easily at the main gears adding return to center wherever I can fixing a small issue with the nose gear optional: add drag steering to front wheel (as there is not that much weight on it) Bad English and here are some pictures. EDIT: These pictures were taken very quickly and from the wrong direction: all showing the older itertion of the wing. The right wing will be the final version (now with orange flaps)

We ha limited part contests before, there was no real problem about prooving it. But maybe it was back in the good ol days when everyone was honest and decent

Any gear solution to that situation will introduce slack which (apart from making the steering very sluggish) will cancel out any effect.

It's only relatively expensive. For example it costs a monthly rent here in Budapest, Hungary. Costs much more than one year of not too intensive smoking. You spend much more on a holiday in a crap apartman in a random European county. It's only expensive if you are not into Lego (or you are too into it). you feel it's expensive because it's hard to explain it to your friends who are not into Lego (but probably who spend much more on their hobbies, because most of the popular hobbies can easily be more expensive, unless you are a maniac collector). regards, Captain Obvious

I don't think you could connect the motor to the engine without needing to modify the whole gearbox. These complicated gearboxes usually work only one way smoothly.

I don't think it does too well. 66 days left ang only 628 votes. Even I managed to achieve such numbers.