Hi, everyone, With the help of a friend I developed a free web application to design rocket engine. This application uses the same calculation model as Richard Nakka's SRM Excel file. Would any of you be motivated to test it and give me feedback? What is missing, improvements, ... The application is almost finished (preview below). We have planned to publish it at the end of April. If you're interested, send me a private message and I will send you the link to the application (not install required). Thank you for your help.