As a long-time LEGO® enthusiast and content creator at solcat.net, I’ve always been captivated by the intricate world of LEGO® Technic. The LEGO® Technic Cat® D11 Bulldozer (#42131) has been on my radar since I first glimpsed it at a local LEGO® store. After further admiration at LEGO® Land in San Diego, I finally decided to invest in this impressive set. Having previously favored the LEGO® Technic Crane (#42009), the appeal of a remote-controlled Cat Bulldozer capable of navigating my LEGO® landscapes was simply irresistible.
This isn’t just any LEGO® set; the Cat® D11 Bulldozer is a substantial undertaking. Comprising 3,854 pieces and weighing in at 6kg, this model commands attention with its dimensions: 26cm in height, 37cm in width, and 57cm in length. Instead of my usual “binge building” approach, I savored this project over several weeks. This paced approach not only enhanced the building experience but also proved kinder to my back.
Immersive Control with the LEGO® Technic CONTROL+ App
The true magic of this cat bulldozer lies in its remote control capabilities, powered by the LEGO® Technic CONTROL+ Mobile App. Using the iOS version, I was immediately impressed by the app’s intuitive design and functionality. It offers a range of tools, including calibration options and two distinct control interfaces for maneuvering the bulldozer. My children are equally enthralled, exploring every feature from adjusting the ladder to precisely leveling the blade for optimal bulldozing action.
For someone with a programming background, like myself, the platform’s extensibility is a significant draw. I was curious about the potential for custom coding – specifically, using Python to control the cat bulldozer. My research led me to this insightful post on the PyBricks website. This resource confirmed the possibilities I envisioned, highlighting the remarkable advancements LEGO® and the open-source community have made in expanding the platform’s capabilities.
Overcoming a Minor Setback: A Gear Adjustment
After meticulously assembling the cat bulldozer, the next step involved connecting to it via the LEGO® Technic CONTROL+ Mobile App and initiating calibration. While connection was seamless, the initial calibration process encountered a snag. Upon closer inspection, I identified a seemingly upside-down yellow, slidable cog.
Initially, the prospect of disassembling part of the build to rectify this felt daunting. Specific teardown instructions for such intricate issues are not readily available online. However, without much hesitation, I began carefully disassembling the structure in manageable sections.
This “surgical” procedure allowed me to access and correct the gear placement. Following the adjustment, I meticulously reassembled the components, hoping that this was the only unforeseen assembly hiccup. Fortunately, my efforts were rewarded with a successful calibration!
Commanding the Bulldozer: Control Schemes and Final Thoughts
The app offers a default control scheme, and I particularly enjoy the joystick interface (I plan to upload a video showcasing this). It provides a truly immersive and hands-on feel when operating the cat bulldozer.
In conclusion, the LEGO® Technic Cat® D11 Bulldozer is more than just a LEGO® set; it’s an engaging and complex building experience that culminates in a fully functional, app-controlled model. While I encountered a minor gear issue during assembly, the overall experience, from the build process to the remote control functionality and the potential for programming extensions, makes this set a highly recommended addition for LEGO® Technic enthusiasts, especially those fascinated by construction vehicles and the power of a cat bulldozer. Stay tuned for upcoming video uploads showcasing the cat bulldozer in action!
