Written by Anthony N. Avallone A guide to preflight inspection of model helicopters As seen in the March 2011 issue of Model Aviation.Today’s model helicopters are sophisticated machines that combine complicated mechanical and electronic systems, allowing pilots of all abilities to enjoy this unique form of flight. These models are incredibly reliable when you consider the factors to which they are exposed, including high-G loads from 3D maneuvers, rotor-head speeds exceeding 2,000 rpm, and, in the case of nitro-powered versions, significant vibration. Because of their…