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Here is my recent MOC of the Corvette C7, and I'd like to share some details about it. It took me over three months to design, and here's the result. The model can be fully motorized by adding PF parts to the static version, making it easy to swap motors when needed elsewhere. I've included a 4-speed gearbox in the MOC, which works with remote control. Initially, I thought the driving ring part wouldn't be strong enough for motorization, but it proved to be reliable. During testing, the driving ring part neither slipped nor was damaged. Interestingly, I started with two XL motors due to the MOC's weight, but they caused issues. The high torque twisted the axle combining the input from both motors. Switching to two L motors, despite their lower torque, resulted in better performance due to their quicker rotation speed. The differential 65414 effectively converts rotation speed to torque. The paddle shifters are based on the idea from Rotating Paddles - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums, with some modifications. The entire gearbox is at the rear of the car, requiring an upright axle for input. To achieve this, I had to use a blue sliding gear to change the output direction. The following picture is for height adjustment, rotating the black 20T gear moves the two pins where the shock absorbers are attached. The front wheel mechanism is similar but more compact. I encountered issues when motorizing the height adjustment, as the medium motor didn't provide enough torque. Down-gearing increased torque but damaged the universal joints along the long axle connecting the front and back. To prevent parts from cracking, I added a 24T gear with a clutch (60c01) to both the front and back. Since I wanted the roof to be removable, the windshield needed to stand independently without roof support. The trapezoidal shape of the windshield was designed with all four sides as integers to build it with beams as below. The top is 18, the bottom is 22, and both sides are 8. Locks on both bottom corners ensure stability when mounted on the car. I used the same geometry for the back trunk cover, extending the sides twice. Here are some pictures of the MOC: Here is a demonstration video: Instructions are available at https://rebrickable.com/mocs/MOC-188766/Lego__Bee/18-chevrolet-corvette-c7, and your comments are appreciated. Thanks!
