According to Wikipedia, the now ubiquitous airbag can be traced back to a 1941 patent on the use of air bladders for protection during collisions. Nowadays, cars in many parts of the world are required

The FrSky D4R-II Receiver is a compact and inexpensive option for small quadcopters. While nowadays I've moved over to smaller FrSky receivers, this post is still useful so here it is. Normally, I configure

Updated Parts Catalog In the last couple years I've been testing parts from various manufacturers, at different price points. Let's just say that I've been slightly disappointed by some name brands as