User talk:145.116.178.57

October 2019
Hello, I'm Epistulae ad Familiares. I wanted to let you know that one or more of your recent contributions to Drag equation have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the help desk. Thanks. Epistulae ad Familiares (talk) 08:02, 1 October 2019 (UTC)