This airfoil was designed in the late 1970s specifically for RC competition gliders competing in F3B and F3F. This airfoil and new molded glider building techniques dominated these categories for years. The RG15 is a very low drag airfoil with a wide speed range and consistent attributes. Small or large, light or heavy, this airfoil's flight characteristics remain relatively the same. This airfoil likes moderate lift and rewards with speed, acceleration, and quick response. It can travel across the sky looking for lift without losing too much altitude... and is a very capable for Dynamic Soaring with recorders over 250 mph.

Many of my favorite slope models use this airfoil from 1-meter up to 3-meter wingspans. The Destiny, Blade, Mach Dart, and the Banana are just a couple.... very fun models and the inspiration for this project's start.

This is a fantastic slope airfoil... but it does have its quirks. It has a sharp stall curve and a low moment, need to get the CG in the right place or it can be difficult and disastrous. Nose heavy is good for maiden flights, and washout was added to the wing design to help with the stall characteristics. When set right the airfoil pays off with spectacular performance and maneuverability.