MyRCCar OBTS Chassis Building Instructions

thingiverse

##MyRCCar OBTS Chassis BUILDING INSTRUCTIONS ###Pre-Concepts: (any correction welcome) - **Scale**: The proportion between the real size of a thing and the size of a model or drawing of it. As you probably know, I like 1/10 scale for its simplicity in metric system. 10 meters in real size will be 1 meter in 1/10 scale. A 500mm diameter real wheel will be a 50mm wheel in 1/10 scale. - **Wheelbase**: The distance between front and rear axles. - **Caster**: The rotation of an axle (front or rear) and its suspension system over itself. They vary caster in sourced RCs in many ways, I try to rotate all the related parts certain degrees over the axle center. - **Camber**: Is the inclination of a wheel relative to its normal position. - **Toe**: The convergency or divergency of wheels in an axle. If the alignment of the wheels of an axle converge into a point in the forward direction I think they call this "Toe-In", while if they diverge they call it "Toe-Out". This "deviation" can also be measured in degrees. If you follow this instructions and the ones in the related publications you should come from this:    To build this:  The parts in this photos doesn't include the sides of the chassis, so the weight of the printed parts will be bigger. ###OBTS Chassis, what's this?¿? On-Road, Buggy, Truggy, Short-course would be 4 different types of rc cars. As this OBTS Chassis has been my first one, to try to get to the most people possible I tryed to make a configurable chassis wich would allow to build those types of cars, "more or less"... There are many differences between this types, starting from wheelbase, the wide of the car, the size of wheels, the spected speed, the height to the floor... But options are not only to build different types of rc cars, also to give more chances to build some parts of the car, as the steering system wich can be build with 3 different sizes of bearings. Something similar happens with the normal Buggy / Truggy CVDs, there are various options so you can choose the one is easier or cheaper for you to find. ###Ok, but where do I start?¿? I think an interesting start point is the type of car you want to build and its related wheelbase. - If you are thinking in building an On-road car you will need short wheelbases. I think commercial on-road cars are mostly 255mm wheelbase (the smallest one you can make with MyRCCar OBTS Chassis) for drifting or standard cars and a little more for long touring ones. Please anyone who knows about this, correct me, I didn't try the on-road build yet. If you are thinking about making this build contact me first so we comment the possible weak points or to know if it would be necessary to create or modify some parts. - If you want to get Off-Road... The Buggy and the Truggy builds are quite the same. As a Truggy would use bigger wheels, it will run faster with same motor and also the height to the floor will be bigger. For this builds I recommend a wheelbase from 270 to 290mm. Remember you can have a MyRCCar Shell, Bumper, Wing and Lights, (a little ugly ones) for the Buggy Build and the Truggy Build I "pre-made". Those are 270mm wheelbase. - There is another unexplored type for me, the Short Course Truck one. I think this cars are heavier and powerful than truggys, and also use other kind of shell, another shape. If you know something about this ones, it would be a honnor to complete this info with the ones in your comments! Now you must know wheelbase will influence the max. size of battery in length and also the length of the motor can. So for example, for a 255mm wheelbase the max. battery length will be 135mm. For a standard 270mm wheelbase it will be 150mm. Also the length of the needed central dogbones for transmission will change with wheelbase and "partial wheelbases" **New dlb's concept: Partial Wheelbase :S** The car chassis, mostly in all its structure, is divided in front and rear parts. This is needed to be able to print them in the most common printer bed size, 200x200mm. *** **Hey! I almost forget about it. I created [my Youtube channel](https://www.youtube.com/channel/UCmwl6WY2EyZcWCt5bSgKb7A) to upload all my videos about MyRCCar and some other future projects. Here you have some links for OBTS chassis related videos:** - [MyRCCar 1/10 Complete Buggy Build. A customizable 3D printed rc car](https://youtu.be/hYULmJWjP6Q) - [MyRCCar 1/10 Complete Buggy Build. Accessing the battery](https://youtu.be/sQ-pWE8tr54) - [MyRCCar 1/10 Complete Buggy Build: Wet day test](https://youtu.be/Pk_DrvNfP9g) - [MyRCCar 1/10 Truggy Build, a complete 3d printed RC car with working shell, bumper, wing and lights](https://youtu.be/p8hnDa9LPgM) - [MyRCCar 1/10 Buggy / Truggy LED Lights Holders. RC Car Light show!](https://youtu.be/eKCUAXWVkYE) - [MyRCCar 1/10 4th build testing](https://youtu.be/2wt6ya_h8J8)