This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Polar Curve . fr Vitesse optimale de plan pour un aronef en Optimal gliding speed for an aircraft own work by original uploader Jmcc en Jmcc Original upload log page en PolarCurve Jmcc bytes no Author is the uploader User Jsmcc Lift and drag curves
Page 2023 Free-images.com. All images are Public Domain