Charles Lieber

THIS PROCESS is simple and requires only a method of masking areas which should not have metal removed, and a weak acid solution. The process of chemical milling also is contest proven and safe. I have been using it in my FAI speed models for several years and have not had any problems with cracked pans, although my planes have hit the ground hard several times and have been shaken apart by screaming Rossi engines with only the counterbalance from the one-blade prop attached to the engine! The process has numerous applications, most noteworthy for weight conscious fliers in FAI Speed, Team Racing, and power Free Flight where magnesium engine mounts are used frequently. AMA speed fliers also can benefit from chemical milling by correcting tail heavy airplanes that use heavy full pans.