A number of years ago, I bought a remote-controlled (R/C) four-wheeled robot base but didn't end up doing anything exciting with it beyond assembling it and driving it around in the dirt a little bit. Eventually, my brother and I began discussing turning it into a mobile rocket launcher - we grew up obsessed with Estes Model Rockets and still had many of them and all the necessary equipment. Once I had some time to spare, I spent some quality time with some Futaba radio equipment, SolidWorks, a LaserCAMM, and some tools, and voila - I had a remote-controlled, four-wheeled, adjustable angle model rocket launcher.
Step 1: Establish your base
Unfortunately, I don't have any information on the base I used, so the photo will have to suffice. Inside the black metal shell, you'll find 4 12V-200rpm motors controlled by 2 motor controllers with servo leads. On the top of the body there are 4 threaded screw holes which we'll use to attach our platform base.
Also in this photo you can see the following, most of which we'll discuss later:
- On/off switch, charging port, and status LED on side of body
- Drive battery packs (white)
- R/C receiver
- R/C battery pack (red)
- R/C switch (hanging off rear of body)
In any case, because I already had the mobile base built (and because it wasn't my design), I won't talk any more about it. You can decide what kind of base you want, and then move on to plan out what the electronics and the launch platform will look like!