This is a gauge for correctly setting up the reflex (upward default position of the elevons) on the FliteTest Mini Arrow aircraft. This printed part provides a more durable tool than the foamboard version that comes with the kit.

For more information on the FT Mini Arrow, review the build video here: http://flitetest.com/articles/ft-mighty-mini-arrow-build

Thanks to the FliteTest team for designing such an amazing aircraft.