JoKo

Hey, nice little one! That's a serious first car MOC I like the see-through design and of course I like the first engine design with working valvetrain even more! Nice use of the new piston pieces, have you considered using them for the final design? The piston would have a more authentic motion instead of behaving like they are valves or pushrods. Thanks for your kind word about the Fiat btw!

Once or twice a year, There is a pinned topic "Contest Index" where you can find all the Technic Contest history

Very nice design! At least as good as official models at this scale. Thanks for the instructions!

Hi everyone! I'm proud to show you this MOC. The Fiat s76 was a prototype race car built in 1910. It is famous for it's huge 28'000cc engine. I made a detailed model of the 4 cyl. DOHC engine with functional camshafts (2) and valves (16). The camshafts are driven by a timing chain and gears. Every valve has proper timing of course. The fake engine can be operated by hand crank at the front with one-way mechanism. The car is far from being a scale model, I meant it as a fun toy but I think the original car is still recognizable. It is remote controlled by Control+ hub, with fake engine drive and car drive by separate motors. Car features: Leaf spring suspension (flex axles) Detailed cockpit with leather seat, wooden steering wheel, ignition timing lever, brake lever... and driver (experienced, yet still reckless!) Fake final chain drive (XL motor and differential in rear axle) Display 1910 Fiat logo HUGE fake engine! Fake engine features: Hand crank and Control+ motor (can't run backwards) Full functional valvetrain with flex axle valve spring Intake manifold with giant carburetor Exhaust manifold with fire Cooling pump, hoses and radiator, oil lines I hope you'll like it !

Thank you, I appreciate! The driver is obviously inspired by my TC27 entry. The main concept was "a realistic complicated engine in a car" and this oversize engine allowed me to deal with the scale problem, it is pretty big nonetheless. I don't have instruction skills but I'd like to make a studio model and maybe video instructions for the engine to explain how to get valve timing right. But right now I have a new auto-lock diff crawler on the shelf waiting for photo/video.

Hi everyone! I haven't posted for a while and I have a lot of new MOCs to share but first I have to show you my project for TC27 ! It's a RC go-kart with a Power Function IR receiver V2, two PF L motors and PF servo. I wanted to build a good drift chassis with no differential, no suspension but I still wanted something steerable when not drifting so I angled the front axle with nb3 axle connectors to have some caster angle. When turning right, it "lowers" the right front wheel and thanks to a rigid frame it lifts (or unload) the right rear tire. Just like in kart racing. The idea with kart was also to build an animated driver using the battery box as torso, articulated arms connected to the steering wheel and animated head to look into corners. He's name is Ken Brick and he's wearing his meanest race face!

@Appie & @Alex Ilea Thanks! I wanted to try "something new". It was really fun design the kart with dynamic driving in mind. I always had a soft spot for Lego creations like automatons or animatronics. I think there is some kind of poetry in the use of mechanical engineering to make somethin "alive".

Hi You all know I like fake engines with more than just pistons and cylinders. This is my version of the Napier Lion. The Napier Lion is a british 12-cylinder, 'broad arrow' configuration aircraft engine built by D. Napier & Son from 1917 until the 1930s. A number of advanced features made it the most powerful engine of its day and kept it in production long after other contemporary designs had been superseded. It is particularly well known for its use in a number of racing designs, for aircraft, boats and cars The challenges were to build the three cylinder rows geometry and the triple rods crankshaft. I had to use quite long connecting rods to keeps the cylinder rows far enough from each other. The engine features double overhead camshafts driven by axles and bevel gears. This kinda hides all the pistons, I should maybe have used transparents cylinders for this one... Since just camshafts wasn't enough I added a propeller with a variable pitch mechanism using a substractor again (I have a weird soft spot for thoses) The knob low on the right side changes the blades angle between 0° and 90°.

I hope it doesn't bother the moderators, but I appreciate nice comments, even about an "old" MOC. Thanks If you like detailed fake engines I will soon show a new one, with a whole car around. Stay tuned!

OK thanks!

OK thanks for checking Let's hope it works for most! Not a good time to be invisible!

Yeah I felt weird about this at first but got used to this voting system. If you want to make it 100% fair and prevent any strategic voting or abstention the only way is to forbid participants to vote and it would change a bit the contest spirit. Like this different people can play it more or less competitive as they like and at the end of the day that's the main goal. This system has one more point: it pushes the hardcore-competitive guy to abstention, which is far better than strategic vote

Sorry I can't edit in a closed topic the pictures are visible on my browser (PC and smartphone) and I used the same method as usual. Are the pictures not visible for you all? Edit: I sized them to 1024x768, rules said 1024x1024 max is there a size limit to 1024x748?

Sorry I rushed a bit to post my entry and video but I'll reveal the head mechanism. It uses a lever, pulleys and a loop of string. With just a bit of slack to compensate for geometric approximation. That's not a simple thing to replicate, requires a bit of tuning. Not easy to make instructions, not a solution that TLG would use. But I could not find another solution with that lack of ground clearance.

Drift Kart and Driver RC Kart: Steering with exaggerated Ackermann geometry and 22° caster angle (PF servo) Rear wheels drive with two PF M motors geared up and no differential IR receiver disguised as a two-stroke liquid-cooled engine Driver: Uses battery box as body Articulated arms for steering and counter-steering Articulated head looking into corners /!\ No toggle joint piece has been harmed during final model assembly

@Mikdun @steph77 @1980SomethingSpaceGuy @Thirdwigg Thanks guys! Happy if it makes you smile! I'll show it in the final photos and video. That was the hardest system to pack in that small kart and i had to be creative on this one! The servo motor is obviously the gas tank or... whatever your fantasy is! The toggle joint mistreating infamy is no more. Was just an experiment. Sorry for the triggering picture but that's WIP

A few month ago I started my first attempt to build a lego clock, not a great success. No doubt that I will put it back on the workbench soon! Thank you for sharing your knowledge!

Wanna see it in action?

As fast as it can be! more video soon! About the unorthodox assembly... That's inside my Lego misstreatment tolerance zone but still not a good idea. it isn't a solution to any problem and kinda ugly. It's already gone.

Of course he will show his driving skill in the entry video!

That's very nice and compact! I will for sure try to use it for a next self locking differential vehicle.

This video was just to illustrate the mechanism in topics about my trial truck MOCs. (https://youtu.be/BRvybPfbMoo and https://youtu.be/sowGB9vvKBg) It is my original idea. I was inspired while playing with differentials, combining two of them like this "subtract" the two wheels speed. The James Watt centrifugal controller was the second inspiration. Very simplified and crude but the idea of "something happens when it turns too quickly" is still there. It is indeed reliable on flat ground at least but will lock when tilted, which I consider more useful than a problem in use. I don't think this can be useful in real life, sounds like a transmission crusher to me. Maybe with a centrifugal clutch instead of violently locking the main differential... Back to the topic. I also hope that @MP LEGO Technic creations will show us his tractor at work!

Beautiful! So nice to see my system in such a perfect MOC. You can see the same system in action in this video: https://youtu.be/rR2us0vD4M8

Quickly after the Batcycl release I wanted to build a hot-rod with these wheels and headlights. Triggered by @1980SomethingSpaceGuy's Cafe Racer I bought two batcycle, built one and started playing withe the pieces from the other. I tried for a while to build a motorcycle engine but was not happy with what I did. So I tore appart the batcycle and build a 8 cylindres engine. It was too big to fit at the front of a hot-rod so I made a rear-engine race car. 1960 was an era when rear engine was the way to go in F1, disc brakes also but skinny tires were still there and wings not yet. I kept the headlights from the hot-rod idea because I liked them. The engine has a unusual configuration. the cylindre blocs are offset by 2 studs to allow the pistons to do boxer-things. the front left piston do boxer action with the front right piston. And so on... If you know me you know that the new blue 12 teeth gear chain-compatible is a game changer for the valvetrain lover that I am. I couldn't help giving this engine a pair of overhead camshafts. Two cams per cylindre, dark gray for intake, black for exhaust. The main challenge was the lack of dedicated car pieces for suspension and steering. That's why there are no working suspension, decorative only. And the small number of pieces according to the car scale was a pain also...Because of 2xB model restrictions I had to be creative withe the structure. Some slightly preloaded assemblis may hurt the feelings of sensitive people like Pythagoras or Studio. I used 84% of the pieces (by weight) Features: - 8 Cylindres Boxer engine with basic valvetrain - 2 Chain-driven camshafts with 2 cams per cylindre - Ackermann (kinda) steering with ball-joint links - A cute smile! Ready to Race!

No offense but maybe claiming total fairness as participant is a bit ostentatious. Strategic voting is not great, sure, but I respect that people enjoy the thrill of a contest different ways. As long as rules are followed we should let people play as they like. There is no need for shaming, drama or controversies, it spoils the fun of this contest. Which-hunting is no more fun than strategic voting itself... Maybe the voting period is just too long... kids are getting nervous!