Don Stegall

This is a very simple free app with charts for drill bits sizes in fractional inches, metric, US num

This is a simple app with charts for drill bits sizes in fractional inches, metric, US number, and U

This is a free Ad-Supported version of the paid RC Calculators app. This is a collection of calculat

This application is a collection of calculators that are convenient for modelers and R/C aircraft mo