Don’t worry about the name, but you spelled it just right @Joaquin. Funny thing, cause my real full name - Hrishikesh - would be too hard to pronounce or remember anywhere, so I used the short version. Just call me H, that’s what I prefer too. I’m sorry about the quality of the image I sent but I made those some months ago and nearly discarded them until I heard about this project. Give me some time to send better images of the current design I have of it which has changed over time and has different iterations of.
To anwer your question, Yes solar /heat coil/ flame powered. These being at different stages as I realized there would have to be different designs using each differently or even independantly or even together at different times according to the environment they are in. The atmosphere near earth is denser, warmer, and would need greater heat difference to attain swifter motion. At higher altitude the atmosphere is cooler and free flowing, scarse and vanishes to vaccum entirely in space. In those times, an entirely solar/ heat, and internal heat contained flight is the only required drive.