This is the follow on article by Chuck Markos that shows how simple modifications of the Double Whammy like a cambered airfoil and a balsa prop make it a very good beginners PennyPlane model capable of flights over 5 minutes in a local gym. This article explains how to build a model that will help transition the beginner into the ranks of indoor rubber duration flying by way of the PennyPlane event.
Build one for the next AMA contest and enter it in the AMA PennyPlane event!