If you are building the HMS
Diana 1794 which was an
Artois class frigate there is a set of high resolution contemporary drawings of the
Artois that you might want to study as you build the kit. They can be found on the WikiCommons site
https://commons.wikimedia.org/wiki/Category:Ship_plans_of_the_Royal_Museums_Greenwich Scroll to page 4 or five and they begin there and carry onto the next page. There are seven drawings.
The cannon on
HMS Diana were likely Blomefields which OcCre did not provide in the past, (hopefully that has changed) You can get a set at any scale in black printed resin. I paid about $15 for a set of 20 barrels in 1:64 including freight after sending the 3D drawing to the printer that I use in the USA. I have the Blomefield drawings in 3D available if you are interested.
If your kit is the Spanish vessel I have detailed 2D drawings of Spanish pattern guns for this era in whatever scale you need, but you would have to have them redrawn in 3D for the printer.
I tried to attach a 3D drawing here of a Blomefield but they cannot be attached.
The photo below is a large scale printed Armstrong Frederick pattern barrel on an appropriate carriage for the era. Unfortunately the George 3 badge is hard to see on the barrel, but it is there.
View attachment 448674
Allan
View attachment 448672