Meteorologists do those graphs. What do you expect. Having set through more than one lecture by NOAA person for certification as a weather watch person as a firefighter. They love graphs and photos of clouds. Sooooo many photos of clouds…
Still, they are easy enough to read once you get used to them.
As a retired toolmaker, I see your trebuchet and raise you the artillery piece I made for myself - a small Coehorn mortar of about 50mm/2" bore.
I’ve known 2 toolmakers that have built their own full scale full functional Gatling guns from scratch also.