Fs2004 Addons: [upd]

FS2004 shipped with historical aircraft (Wright Flyer, Spirit of St. Louis), but add-ons like the MAAM-SIM Douglas DC-3 took it to another level. The DC-3 simulation was so robust it was used in transition training. It forced the pilot to manage fuel burn, prop pitch, and mixture in a way modern sims often automate.

While many commercial developers have moved on, several repositories still host thousands of files: Frequently Asked Questions - Rikoooo Flight Simulation fs2004 addons

Performance considerations