50Instructables258,690Views307CommentsMy basement in Oklahoma, USJoined February 1st, 2017
Formerly the owner of a company that designed software for avionics (EFIS, FMS, etc.) and video games (Tetris, Robocop, Predator, Michael Jordan in Flight, and a number of others), I'm now retired and finally have the time to design, print, assemble, test and publish 3D models for my kids, grandkids and, hopefully, you and yours to enjoy. See all of my videos here: https://www.youtube.com/user/popzct0214/videos.
- gzumwalt commented ongzumwalt'sinstructable Balloon Powered Single Cylinder Air Engine Open Chassis3 months ago
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