User talk:2A02:1810:C20:D800:2CB9:DF5F:3031:F08D

Recent edits to Polar curve (aerodynamics)
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Polar curve (aerodynamics), but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you! Materialscientist (talk) 21:52, 24 August 2019 (UTC)