User talk:197.37.243.55

August 2022
Hello, I'm BilCat. Your recent edit(s) to the page North American X-15 appear to have added incorrect information, so they have been reverted for now. If you believe the information was correct, please cite a reliable source or discuss your change on the article's talk page. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. The speed of sound varies depending the on altitude, temperature, etc, per WP:MACH. BilCat (talk) 17:52, 26 August 2022 (UTC)