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Showing results for tags 'dual'.
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finally finished a prototype! I was really on and off about entering, i tried about three different ideas before settling on this one. The name coincides with the guns mounted on both ends. Hog (both ends [more later]) Dual guns (hence the name) Dual seats (one each way) Symmetrical body Active bumpers (for battering rams) Lightweight body The steering is the wacky function of the build, so if you need to u-turn, the drivers swap controls. the rear seat operates both guns, and front operates throttle and steering (rear hog steers correctly to not obscure in the driver's view). The bumpers are still WIP, they are going to be wider to be like battering rams, or protect wheels. The car is driven by a powerful set of torque vectoring motors. Notice the bumper movement? -
I started working on this model many weeks ago in Lego Digital Designer first. The whole concept started with the quarter circles from BWE, which are able to perfectly accomodate the small rotors. I was heavily inspired by the (movie) Avatar's rendition of helicopters. After a lot of tinkering in LDD, it was time to start building in real life: It was here I discovered I made a big mistake. The control stick located in the cab used to tilt the rotors was reversed! I had to go back to the drawing board and correct the control mechanism. Few days, fixes and improvements later, this is what the final model looks like: I wanted the colors to randomly switch from yellow to make it look more eye-striking. Where possible I used black 2L pins instead of the blue ones. As stated in the topic name, this is a motorized model, powered by the small LiPo battery box which is hidden in the tail, next to a single M motor: The single M motor powers a total of 3 functions: - Drive rotors (always engaged, spinning in one direction only) - Opening cargo doors and rear ramp (powered by a gearbox) - Working winch (powered by a gearbox) You can see the driveline of all the motorized functions here: The red mechanism at closest to the M motor makes sure rotors are spinning in one direction only, irrelevant of which direction M motor spins. This way changing direction of the gearbox does not change in which direction rotors spin. Gearboy in front switches between openining doors+ramp and a winch. The doors and ramp are actuated by a single actuator located right behind the cockpit: The rear of the cargo doors is connected to the ramp via bewel gears, so both open at once: I also bult a small container which can be easily lifted by the motorized winch: The container can easily fit inside the cargo bay area: You can see the finished model's video below: -
Not for LEGO purists, contains modified LEGO parts. It has been a wonderful struggle, but it paid off: a super fast, relatively stable LEGO RC Boat, driven by a brushless elektromotor and two, counterclockwise turning propellors! No torque-roll anymore, almost no porposing (thanks to the trim tabs), direct steering and great fun! To get the balance right and to get the boat planning at higher speed was a challenge. But it works! The wet area can be reduced to a minimum, at high speed the boat is almost complete on top of the water (downside: hardly any control left :(( ). Based on a 54799 LEGO Hull with a few additions: - 3D printed stuffing tube to cater for an in-board, brushless motor (10 mm tube stuffed with LEGO parts to make it waterproof) - A gearbox to convert the motor output into two counterclockwise turning axles - A 2x2 3D printed LEGO brick to make the steering arm waterproof - And al the 2.4GHz RC parts: ESC, servo, battery pack, receiver Please have a look at the video and let me know your comments.
