Rock Hopper

thingiverse

A 3D printed FPV capable 4WD skid-steer Rock Hopper NB. Edited 3rd Oct 2018 to offer a strengthened "alternative diff link". The enclosed files contain all the individual parts needed to build the Rock Hopper in various configurations according to personal preferences and available equipment. The version created is the one shown in the video, which sports an optional WG2 (a FeiyuTech Wearable Gimbal) mount, print-in-place head and tail lights, and print-in-place L9R receiver and 5.8GHz masts. If these components are not available, a good starting point would be the "Plain" Body/Lid combination. Many of the Body/Lid/accessories can be printed "in place" using multi-colour or even multi-materials, in which case all the files that start with "Body..." can be merged into a single printable component. Likewise, all the files that start with "Lid..." can be merged with the "Lid for masts" or "lid for no masts" file and whatever components are desired to tailor the design to specific needs. Note that although the list of files might look daunting, there are many duplicate parts included designed to be either printed separately or printed-in-place, which makes the project appear more complicated than it really is. There are only three options: 1. A plain body/lid to which separate lights/masts/whatever can be attached however desired. 2. A print-in-place Body/Lid with no provision for a receiver mast or video transmitter mast. 3. A print-in-place Body/Lid designed specifically for those masts. A bill of materials and an overview video showing how all the parts are situated and explaining their function will soon be uploaded, which should help decide what version best fits needs. The motors used are 12v 37mm diameter 120rpm gear motors similar to these: https://www.ebay.co.uk/itm/163765968928?ssPageName=STRK%3AMEBIDX%3AIT. They're widely available on amazon and ebay for about £11 ($15 each). Mine are wired up with one ESC per side (two wheels), but if better traction is desired, one ESC per wheel would give much better results. https://www.youtube.com/watch?v=cPhpl_WkieM: