How to make a lego engine ? Pneumatic engines aren’t something we use every day, but they’re compelling things to see working in practice. [Nico71] built an eye-catching example out of LEGO Technic, and it’s remarkably fully-featured.
The build relies on a single pneumatic cylinder driving a flywheel. Flow to the cylinder is determined by camshaft-controlled valves. The valves themselves are custom-built, composed of hose loops that are kinked to shut off flow. In addition to the basic operating components, the engine also features a throttle valve which uses the same kinked-hose principle.
The main control valves are installed in a housing that can be rotated relative to the engine’s frame to vary the timing of the valves relative to the flywheel’s rotation. A gear system allows fine adjustment of the timing. The throttle and timing controls are accessible on a tidy control panel complete with a idle-adjust mechanism.
Custom Lego Technic Diesel Engines Have Working Turbo, Cooling Systems
There’s an art to building intricate models using Legos. Like other miniatures and scale models, the lifelike accuracy is only limited by the artist’s imagination and skill. That’s what makes the creations in this video so incredible. They not only look realistic, but the movement is incredibly lifelike.
A video showing these Lego mills was featured on Beyond the Brick’s YouTube channel. It starts with a giant inline-six-cylinder marine engine complete with moving pistons and a rotating crankshaft. The valvetrain moves up and down like part of an actual two-stroke motor. You can almost imagine it powering a large cargo ship, making its way across the ocean with thousands of cars on board.
The turbocharged I6 isn’t the only attraction of the video. Next, a 40-wheel heavy transport tractor-trailer loads another marine engine and takes off. The whole operation is realistic, from loading and securing the cargo onto the flatbed, to individual suspension actuation of the transport’s wheels.
The final engine is a V16 diesel-powered emergency generator. It’s incredibly accurate down to the control panel that starts the generator and manages the engine’s speed.
All of these machines were created by Stefan Weinert. According to his bio on Rebrickable, he likes to create his own truck models and purely functional models like gearboxes and motors. At one time, he drove heavy trucks, which is partly why he’s enthusiastic about them.
Weinert is a purist, refusing to use 3D-printed or self-made mechanical parts. He also avoids modifying the Legos, including gluing, drilling, or filing them, to alter their shape or appearance. In addition to his YouTube videos, he sells complete instructions for his creations so that you can build your own.
Beyond the Brick was founded by Joshua Hanlon in 2011. It started as an audio-only podcast before expanding to showcase talented Lego builders and their incredible creations. The YouTube channel has over one million subscribers and showcases unique creations from engines and machinery tohistorical recreationsand even some Rube Goldberg contraptions thrown in for good measure.
World’s Smallest Working Lego V8 Sounds Like the Real Thing
Lego engines powered by compressed air are always a sight to behold, but sometimes they can be cumbersome contraptions that are too complicated for their own good. This tiny plastic eight-cylinder isn’t like that, however. The engine’s builder claims it’s the world’s smallest Lego V8, and despite it having a few 3D-printed parts, I believe him. Heck, it even sounds like the real thing.
The little engine in the video revs as high as 4,350 rpm. Its incredible Lego parts are able to stay intact at those speeds, especially considering the seeming lack of lubrication. Not everything here is OEM Lego, though. The creator mentions the crankcase is a 3D-printed part not of his own design, and the crankshaft and valves are custom, too. Interestingly, the valves that control the airflow are from tire valve cores.
This unit is likely a two-stroke. ICE-adjacent compressed air motors like these often do not have a distinct compression or intake stroke, just a combined power/intake and exhaust stroke. That doesn’t mean it’s functionally any different than a big V8, of course. And since it has a cross-plane crank, it even sounds like the real thing.
Similar Lego engines we’ve seen before use the brand’s sealed pneumatic cylinders as opposed to the actual mock engine/piston sections seen here, which are also factory Lego parts. Those motors are capable of more efficient sustained operation and are even powerful enough for use in a self-contained air-powered vehicle. So far, the engine in the video we’re seeing today is only driving a flywheel. It looks and sounds a lot more like an actual engine, though, which makes it just as cool in my book.
How to create a cool LEGO remote controlled car.
In our house we love to play with remote controlled cars. But RC cars in the kid-budget area tend to break after a few hours of use.
Not long ago we shopped a bit a Lego.com and we got some of the “motor” pieces that normally only come with some of the largest Lego Technic sets.
And very quicky, a remote controlled car in Lego Technic was put together, and it actually gave the same play ability as a normal remote controlled car, plus the entire Lego universe. And it seems unbreakable – If something “breaks” – we put it back together again, or perhaps a new car is suddenly a reality.
The center piece is the “88004 Servo motor”, a motor that gives a 180 degrees turn and can be controlled with any of the IR remotes from Lego. We had the IR Receiver (8884) from a Lego train system and we got the 8885 remote controller.
A motor and a battery box is of cause needed, the standard 8293 motor set will do fine, however, if you want more power, the new L-motor or XL-motors are great for speed and power. We use the L and XL motors that reason.
Listen To The World’s Tiniest Engine Sing Its V8 Song
Lego has previously built functioning engines, but one fan of the Danish toymaker has taken things a step further with a fully operational V8 motor built out of Lego pieces and several custom components.
Dubbed the “world’s smallest working Lego V8,” the engine features original cylinders and pistons from Lego, but they’ve been combined with a bespoke crankshaft and valves, which were designed and made by the builder. Interestingly, the valves were fashioned out of two different tire valve cores.
The crankshaft, however, is partially made of metal and even includes 3D-printed parts. Another Lego engine aficionado made the crankcase, and all these parts come together to create an incredible ode to the internal combustion engine.
Watching it run is a sight to behold, with a characteristic V8 rumble emanating from the motor. Superb sound aside, it’s incredible that this little engine operates flawlessly, even when revving at 4,350 rpm. The apparent lack of lubrication makes it all the more impressive and shows the creator put a great deal of thought into this miniature powerplant.
We’d be interested to see how much power this engine makes. Even though it uses non-Lego parts, it’s fantastic to see this built out of toy components. It would be great to see this little motor in a toy car, and we can imagine a small Ford Mustang GT whizzing around the living room with this engine pushing it along.
While this is the first time we’ve seen a working engine made from Lego parts, miniature powerplants aren’t anything new. World-class model car producer Amalgam makes some of the finest engine replicas and recently introduced a 1:4 scale replica of the F140HC engine and seven-speed gearbox found in the Ferrari Daytona SP3.
If you’re interested in putting your own miniature engine together, a company called Stirlingkit offers scale models that can be put together for some satisfying results. One of their latest models is just 17.5 cc, modeled after a Ford flathead V8.
It’s certainly an interesting way to pass the time and should prove rewarding to put together. But we have to admit, we’re seriously impressed by the Lego-based engine. Designing it and putting it together is one thing, but the fact that it works reliably is remarkable.
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