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LEGO stress-tests & other experiments!

Using LEGO pieces to build mechanical creations is a popular hobby, as evidenced by all the crazy and impressive contraptions featured on LEGO forums, blogs, and YouTube channels. LEGO themselves runs a very interesting series on their own YouTube channel titled Beyond the Instructions, featuring all kinds of LEGO-built machines. We talked about them here and here. If you are interested to build your own mechanical creations, it is very useful to know the limitations of LEGO as a building medium before investing time and money into a complex project. 🙂

A YouTube channel that I recently discovered focuses on testing the capabilities and limitations of LEGO Technic elements. Aptly named the Brick Experiment Channel, they test the breaking points of LEGO pulleys, gears, motors, axles, wheels, and more. At the time of this writing, there are only six videos on the channel, but they are all very educational and could be useful in your own LEGO creations.

The first experiment demonstrates how much weight can be lifted with LEGO tackles and a LEGO Power Functions M-motor, and what is the best combination of pulleys and tackles to lift the maximum amount of weight. The experiment does a similar test with different gear combinations. The third experiment combines gears and pulleys/tackles to generate the maximum possible lift with a LEGO Power Functions M-motor. All these tests are done carefully in small increments to be able to record the results, and learn from mistakes and blow-ups that happen along the way. Also, notice the effect weight has on the support beams and other parts!

Speaking of the effect of weight on LEGO parts, the fourth video shows what happens when a LEGO Power Functions M-motor with gears and pulleys tries to lift a hefty 102.2 kg (gear ratio 15:1 and tackle velocity ratio 8:1). I particularly like the slow-motion demonstration of the axles, beams, and strings at their breaking point. Lots to learn, and learn from! (By the way, only LEGO parts were used for these tests with the exception of the strings.)

The fifth experiment sacrifices a LEGO axle to see how it deforms/breaks when high torque is applied with a LEGO Power Functions M-motor. Here are the test results for reference: 1:1 (40 mNm) – ok, 3:1 (110 mNm) – ok, 5:1 (180 mNm) – slight permanent deformation, 9:1 (300 mNm) – serious permanent deformation, 15:1 (500 mNm) – even more serious permanent deformation, – (? mNm) – breaks in half.

In the sixth and final experiment (so far), a LEGO wheel is tested to see how fast it can rotate using LEGO motors and various combinations of gears. It can actually handle 2850 RPM pretty well. There are plans to redo the same test without a tire on the wheel, and with some lubrication, which may allow higher RPM. You can watch all the videos in the player below.

While there are only six videos on the channel at the time of this writing, they are enthusiastic to continue with future projects. They are also open to suggestions, so if you would like to see some other tests, leave them a comment on their YouTube channel, and subscribe to get updates. Experiments like these are particularly helpful if you are working on large LEGO models that need to handle weight and/or have moving components. If you like to play with mechanical models, some of the larger LEGO Technic sets include parts and mechanisms that are great for experimentation and learning. A couple of currently available examples are the #42055 LEGO Technic Bucket Wheel Excavator, and the #42070 LEGO Technic 6×6 All Terrain Tow Truck. You can find them at the LEGO Technic section of the Online LEGO Shop.

What do you think? How do you like these demonstration videos? What other experiments would you like to see? Have you ever tested the capacity of your own LEGO parts or models? Feel free to share and discuss in the comment section below! 😉

And you might also like to check out the following related posts:

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LEGO Ideas Voltron set available now!

Just a quick reminder that the #21311 LEGO Ideas Voltron set is now available for LEGO VIP members. Below, I have included the official description of the set, as well as the designer-video, and more. Enjoy! 🙂

The #21311 LEGO Ideas Voltron was originally designed and submitted to the LEGO Ideas platform by Leandro Tayag (a.k.a len_d69), a software architect from the Philippines. You can learn more about the model here: LEGO Ideas Voltron Set Announcement. Once the project was approved, LEGO designers Niek van Slagmaat and Mark Tranter turned it into an official LEGO set. They share some very interesting details and insights about working on this project, and being a LEGO designer in general.

To learn more about the #21311 LEGO Ideas Voltron set from a LEGO fan’s perspective, Chris from the Brothers-Brick shares an informative and detailed video-review of the building experience, some of the building techniques, play-features, and how the lions are transformed and connected.

Here is the official description of the set: Let’s go Voltron force in LEGO style! It’s time to defend the universe so get ready to form the #21311 LEGO Ideas Voltron, the biggest buildable LEGO mech ever! Activate interlocks! Dynotherms connected! Infracells up! Megathrusters are go! This awesome set features buildable and highly posable black, blue, yellow, red, and green lions with specially designed, extra-strong joints to combine them all and create the Voltron super robot, plus a huge sword and shield that attach firmly to Voltron’s hands. Form feet and legs with the blue and yellow lions. Form arms with the red and green lions. And form torso and head with the mighty black lion. Then grab the super robot’s huge sword and shield and form Voltron to defend the universe! Ideal for display or to recreate thrilling action from the original 1980s animated Voltron TV series and the modern DreamWorks Voltron: Legendary Defender series. Voltron measures over 15” (40cm) high, 5” (14cm) long and 8” (21cm) wide. Black lion measures over 6” (17cm) high, 8” (22cm) long and 5” (15cm) wide. Yellow and blue lions each measure over 3” (8cm) high, 8” (21cm) long and 3” (8cm) wide. Green and red lions each measure over 3” (8cm) high, 7” (18cm) long and 1” (5cm) wide. Voltron’s sword measures 11” (29cm) long. Voltron’s shield measures 6” (16cm) in diameter. 2,321 pieces. Price: $179.99 – BUY HERE

The #21311 LEGO Ideas Voltron is a fantastic looking set. Even if you are not a fan of the Voltron: Defender of the Universe television series, learning how to build giant robots like this can be really fun and educational. The lions transforming and connecting to make up the robot is especially well done. There are some limitations, especially in the movement of the giant robot, but it’s good to see that the model is sturdy and won’t fall over easily. I wish there were minifig riders for each of the lions, but other than that, I think any Voltron fan and/or giant mech fan would be happy with this set.

What do you think? How do you like the the #21311 LEGO Ideas Voltron set? Are you planning to get it? Feel free to share your thoughts and discuss in the comment section below! 😉

And you might also like to check out the following related posts:

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