Two rare parts drop off completed expeditions. Engine Parts come off wreckage the fleet strips on the way home; Plasma Cannons come off whatever the pirates left behind, at roughly half the Engine Part rate. Both are salvage, and salvage pays better at night.
Every completed expedition rolls the table, inside the US session — 09:30 to 16:00 ET — as well as outside it. What changes after the bell is the rate: After-Hours Raids run against the same table multiplied by 3, so a session-only fleet assembles the same parts on the same recipe and takes about 3 times as many flights to do it. The faster route is not free. Raids carry a higher pirate failure rate and a floor under it, so the parts are paid for in ships that do not come back.
The parts craft one thing. 8 Engine Parts and 4 Plasma Cannons combine into a Launchpad Ticket, and a Wall Street Dreadnought is specified to carry a guaranteed ticket on a fixed cadence of its own flights without crafting anything. Under the planned long.xyz integration those tickets become front-of-line access to IDOs of tokenized stocks. That integration is intended, not built and not agreed, and the rates below are design assumptions rather than measured drop data.