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Found 2 results

  1. Zerobricks

    Leopard 4x4

    After a few month break it's time to get back to Lego and Eurobricks, and why not do it in style I give you the leopard 4x4: The model is a combination of the following ideas and concepts: Quite some time ago I came up with double torque tube suspension idea and now it was time to use it in a real model Claas tyres were an obvious choice due to their agressive profile and massive size. With the release of the 42069 set, I was finally able to build a model with a unique and striking color combination The final model took me some 12 hours to build and the features are as following: - Powered by 4 RC motors and 2 Buwizz - Double torque tube suspension - Independent dual drivelines - Dual servo steering gemoetry - Working winch - Working lights - Openable doors - Openable hood - Openable and removable rear cover Specs: - Width: 24 cm - Height: 24 cm - Weight: 1600 grams - Final gear ratio: 1:5 from outermost RC motor output - Total power: ~60 watts Now onto the photos: The rear trunk can be opened: There is barely enough room left for seats in the interior. Notice the different springs used to potimise suspension. The before mentioned springs give the model excellent flex: There are two servo motors used in order to keep the steering system as stiff and strong as possible: Under the hood there is a hidden winch, which is strong enough to lift the car: And the final, most important photo. Notice how the left and right side wheel drive axles use different colored joiners and bushes: And finally there is a video of the model in action: Safe to say the combiantion of the four RC motors and two Buwizzes with a low gear combiantion of 1:5 results in a model with impressive performance. As seen in the video Leopard can wheelspin all 4 wheels when accelerating on flat surface, which is a first for any of my Lego offroaders. Dual servo motors provide massive steering power and rigidity and allow the wheels to be steered into obstacles with ease. Only downside to the model is it's slightly high center of gravity cause by all the added panels and detailing. P.S. It feels good to be back
  2. I got this idea yesterday and decided to build it. Its an improvmement of a classical torque tube suspension, but now it uses 2 torque tubes to form two half axles which are connected to each other via a turntable: To keep the half-axles from bending away there's a lower linkage made out of 5L suspension arms and some beams: So what's the difference btween this and classical single torque tube? Lets start with advantages: - No need for links or panhrads to keep the axle in place - Now each axle can have an independent drive, which cancel each other's torque therebye elimenating torque flex - Or you can use one ball joint for drive an dother for steering - Can carry much more torque And there are also some disadvantages: - Less flexible, maximum angle this setup can bend to is some 30 degrees - Steering is a bit more complicated, since the axles pivot in the center, you need some ball joints and links - Takes more space But you can even expand the concept to use three torque tubes. Now the side ones can carry power while the center one supports the steering system: This is just a concept for now, but I might try it in a realy model just to see how well it will work. What do you guys think? If possible try to build one your own and give me some feedback.